MBP overheating -bad-

I can't seem to find anywhere on the internet that says what a good temperature for a MBP is, but I feel like mine is ridiculously overheating. I -do- play World of Warcraft, which is the -only- game I play on this computer. I installed one of those programs that tells you how hot your computer is, and it peaked at 201 degrees Fahrenheit.
What do I do? I don't want anything to fry. It hasn't shut off or anything, and I changed the settings on that program so the fan runs a little faster in order to keep my computer cool.
I have a genius appt on Monday, but is there anything I should try to keep it cool until then? I don't have AppleCare anymore, so I'm terrified of having to replace something.

xxMagic --
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This seems to have something to do with your last post on Fan Noise:
Click Below:
http://discussions.apple.com/message.jspa?messageID=12658274#12658274
You were advised there to run the Hardware Test . . .
If you can't do that, then don't play WOW on there til after Monday.
What happens when you shut it down and wait 5 minutes or so? Does it cool down?

Similar Messages

Help + Opinions: MBP Overheating + Testing. Inconclusive.

Hey guys,
So I've been reading for the last two days about the MBP overheating and there seems to be significant descrpencies from user to user. Some users swear that their MBP never gets over 60˚C (all temperatures below will be shown in ˚C) and others swear that their normal operating temperature even while browsing the internet is 75˚C +. Nonetheless, over the last few months I've noticed that my MBP is running very hot and w/ in the last two weeks I have seen it actually shut down due to temperature at 3 times. I live 2,000km from the nearest Apple Store (China) so unfortunately, at least for a while, Genuis support is out of the question. It's become quite an issue because my a professional photographer who generally has PS3 and LR3 open at the same time, which didn't use to be a problem
I'd very much appreciate some educated and thoughtful input into this subject and see what you guys would suggest to maybe alleviate the problem
Conditions
- MBP elevated about 1 inch attached to 21 inch monitor
- About 2 months ago I upgraded to Snow Leopard - didn't notice this issue right away but the upgrade is noteworthy
- Notice constant temperatures between 65˚C and 85˚C while only browsing the internet, being the same under both testing conditions - averaging closer to 70˚C
- My fans hardly ever go below 6200rpm - annoying and bad.
- The MBP is 13 months old
- I absolutely cannot play any graphic intensive game for more than 10 minutes w/o a forced thermal shutdown... sad.
- Already reset crm(sp?)/fan controls and the PRAM - helped a little under idle conditions.
- All OpenGL support in PS3 is turned off
Test #1 - "Better Battery Life"
- I took two sets of readings on these tests: The Computer temps + Processes, both w/o load and under load
- I let the computer idle for about 5 minutes before taking any readings
- Notice the temps while having one document open in PS
- Fan on max, 6200RPM most of time, bottoms out around 4200 RPM once the CPU drops to around 59˚C
http://brianhirschy.com/mbp/mbpnhigh.jpg
Test #2 - "Higher Performance"
- I took two sets of readings on these tests: The Computer temps + Processes, both w/o load and under load
- I let the computer idle for about 5 minutes before taking any readings[/
- Notice the temps while having one document open in PS
- GPU Diode seems to be 15-20 degrees HOTTER while everything else remains the same
- Fan on max, 6200RPM all the time, no matter the temp
http://brianhirschy.com/mbp/mbphigh.jpg
Strange Conclusion
If feels as if the computer actually runs cooler and faster under the "Better Battery Life" option. I feel that the GPU Diode is actually heating the computer more than necessary esp. in non-graphic intense situations. I'm tempted to run the computer under the "Better Battery Life" vs "Higher Performance" option. Strange conclusion, I know.
General Questions
+- Aside from the issue at hand, how would it be possible to see better performance under a 'lower performance' setting - ie, better battery life.+
+- I'm finding it very difficult on the internet to see if this is w/ in the range of normal operating temps+
+- What does the 'Higher Performance' option in Sys Pref -> Power Mang. actually do? Seems to just prime the GPU+
+- Is it entirely possible that I'm just NOT going to be able to game on this rig due to overheating? Seems like that's an issue.+
+- Have other users noticed that the fans just simply don't turn off when on "Higher Performance" setting?+
Nonetheless, if you've gotten this far, I appreciate your time and thanks for reading through this. I know there are many threads on this issue, but none are conclusive and most don't provide any supporting evidence to suggest there is a heat issue. As an experienced MR forum user, I wouldn't be rehashing an old issue if there wasn't a reason for it.
Thanks again,
Brian

If feels as if the computer actually runs cooler and faster under the "Better Battery Life" option.
It does run cooler. The Better Battery Life setting invokes the lower-powered GPU, which uses less power and generates less heat. Faster? Not likely — but under many conditions and workloads it won't be any slower.
I'm tempted to run the computer under the "Better Battery Life" vs "Higher Performance" option.
Go ahead. You may find that your workflow doesn't suffer perceptibly or at all.
Three things that can cause your machine to work extra hard and generate lots of extra heat are inadequate RAM, an overly full hard drive, and a runaway process hogging CPU cycles without your knowledge. If you don't have at least 4GB of RAM, upgrade to 4, 6, or 8GB: the more the better for your purposes. If your hard drive is more than 80% full, you need a bigger one, given your photo applications' demand for scratch disk space. To make sure you don't have something running in the background that's jacking your computer's temperature up, follow the procedure described in this article:
http://support.apple.com/kb/TS1473
If you have USB external hard drives connected most or all of the time, switch to FireWire drives. USB imposes an extra processing load on your CPU that FireWire does not.
Finally, if you are running your machine in clamshell mode (with its display closed), open the display. It will cool itself more efficiently that way.

Macbook Pro Overheating Badly

My macbook pro has been overheating badly. The fans turn on and the computer heats up about five minutes after I turn it on every day. I downloaded a temperature monitor, and the CPU A Temerpature Diode reads 106˚C, the CPU Core 1 reads 103˚C and the CPU Core 2 reads 103˚C. I know this isn't normal, but I'm almost two hours away from the nearest apple store, and because of that, I'm not able to get up there anytime soon. The fans are running at full tilt, and I no longer use the laptop on my lap. The battery has also gone bad, and that may be due to the processor drawing too much power. My laptop was purchased two years ago and still has the apple warranty on it. If anyone can help, I would be greatly appreciative.
My computer is a Macbook Pro 17"
2.8 GHz Intel Core 2 Duo
4 GB 1067 MHz DDR3
Running Mac OS Snow Leopard

I am glad you got it sorted out....Stedman has told you what the process was about.....
....You might want to take a some time to learn how to use Activity Monitor.....it is an excellent program for establishing a base line for your MacBook Pro (easier to spot problems).....
http://mac.appstorm.net/how-to/os-x/making-the-most-of-activity-monitor/

MBP overheating, fan control apps not working

Hi, everyone.
I know there are tons of threads out there about MBPs overheating. I've read most of them, but I couldn't find one with my specific problem, so I'm posting.
I have a 13" unibody MBP I got in late 2009, running OSX 10.6.8. It has been reaching high temperatures (70+ degrees celsius) for about half a year. I installed smcFanControl and have been running my fan at high speed (6000+ rpm) consistently. It's noisy but it keeps my laptop cool, so I don't mind.
A couple of days ago my fan started making awful whining noises. I figured something was obstructing the blades, since my laptop does get pretty dusty in the places I use it. I'm planning to open it up and clean it out (with compressed air) once I get the time, because I figure it must be pretty dirty inside.
Now I have another problem, though. smcFanControl has stopped working: even though I set the fans to run at 6000+ rpm as usual, they are only running at at most 2000 rpm. I tried another app (Fan Control) and it doesn't work either. It's like the fan system management has stopped responding to the apps, or to the temperature of the laptop.
This means my laptop is getting frighteningly hot. It's reached 93 degrees celsius about fifteen minutes ago. Right now I'm not doing anything but typing this, I don't have any programs but Chrome and a word editor open in the background, and it's at 78.2 degrees celsius…but the fan is still running at only 811 rpm. I can't get it to go any higher with my fan control apps. I can barely feel the exhaust coming out of the back. Here's a screenshot: http://i.imgur.com/5nTBq.png
Is it possible this problem could be caused by a dusty fan, something obstructing the fan, obstructing the cooling passages in the laptop, etc? If so, will cleaning the laptop fix it? I don't know what else to do.
Thanks in advance for any advice.

The Apple Store genius bar will clean it for free. Since you got it in late 2009, it's about that time to get your fan checked out.

MBP overheating on EVE online

Hi. I've got my MBP about one month ago and i'm completely new on apple computers. I usually use my MBP with DAW programs (like ableton live and reason) and cpu's temps about 45-50 and fans 1900-2000 rpm according to istat. but when i start eve online (using 9600 gt) cpu degree jumps to the 72 and fans rpm to 7k (also fans work a bit noisy). is it normal process or my mbp has got some bad issues ?

Yup it's normal. The intel mobile CPUs are good to go up to a bit over 100°C without any damage. If you are concerned about temps, you should look into SMC Fancontrol though 72°C seems fine to me.

Yet Another 17" MBP Overheating Saga

I've seen all the chatter on the discussion forums regarding overheating and decided I should post my experience thus far.
I purchased my MBP 17" on July 19th 2006 and fell in love instantly. It's wonderful. However, shortly thereafter, I noticed the area above the "Function keys" and the bottom of the computer getting extremely hot. Like, too hot to touch. I don't need a widget or "CoreDuoTemp" to tell me what my brain already knows; this computer is almost too hot to touch at times.
I run Photoshop CS2 on a daily basis, as well as iChat and a few other programs simultaneously. I understand that being an inch thick, with a hot processor and constructed of aluminum can equal a warm computer, but the heat from my MBP was starting to get ridiculous.
So, I call Apple Care and was told to check the Activity Monitor for any process that may have been "off to the races" with my notebook. There were none. I was asked if it made any difference if the AC power was plugged in.....there's no difference. I was then told, and I'm not making this up, that, "Heat is a subjective term." I laughed and said, ok....but when you touch something hot, how else can it be explained? If you pick up a warm coffee mug or touch a HOT stove, it doesn't take much for your brain to tell you that something is hot versus warm. I'm 31 and know the difference between a normally functioning WARM computer and an outrageously HOT notebook that makes my hands swell when I type on it. It's a no brainer. Hot = Hot. Period. It's not normal. The technician and I shared a laugh (I'm never belligerent) and I was told to make an appointment to visit a Genius in a retail store.
The following day, I meet up with a Genius and he was quickly able to get my computer hot, even in the somewhat chilly Mac Store. He opened up the terminal and he appeared to have started some sort of loop that printed out 'Y' to keep the processor busy. He also opened quite a few apps (chess, photoshop, illustrator, itunes, ichat) and was able to reproduce the problem easily. It was then that I was told that my computer would need to go away for service. It would be back in 5-7 days.
To Apple's credit, my computer arrived back in 7 days, even with the Labor Day holiday thrown in there. I was stoked. I did a happy dance. I pulled it out and lavished affection upon it and got right back to work. But as I'm sitting there working in Photoshop again (like I do every day) it starts warming up.....then, it's HOT again. I read the repair notes and see that they performed the following services:
593-0326 CBL, TEMP SNSR, RT FAN, M9
593-0358 CBL, TEMP SNSR, GPU, M9
603-8485 FAN ASSY, LT, M9
603-8486 FAN ASSY, RT, M9
I'm a little miffed that the parts were replaced, yet the machine wasn't fully tested before being sent back to me. This is not hard to reproduce. If a Genius can make my computer heat up in under 30 seconds, why are the technicians not doing the same thing? It's sloppy.
Anyway, I called Apple Care again (just a few minutes ago actually) and I was asked the same questions again. This time though, the technician suggested I try to reset the power module by powering off my notebook and then removing the battery. Once that was done, I was to hold down the Power button for 5 seconds. I reinstalled the battery and brought my machine back up. When the computer came back up, I opened Photoshop and a bunch of other apps and still my computer is hot. I was told I could take it back to a retail store (not going to happen again as it's a waste of my time) or they could arrange for a box to be sent to me again for repairs, but of course, I have to get back on hold for 30 minutes before I can initiate that course of action again.
A friend had mentioned to me that Photoshop is still not quite "tuned" to the new Intel chipsets and that it could make excess heat for my notebook, but I'm able to recreate this issue without Photoshop running. Chess usually does the trick nicely. The 'sjeng' process makes the processor work pretty hard and my machine starts getting nice and warm.
But, to wit, my computer will be going back to Apple AGAIN in the next few days. I wish there were clear answers to this problem. I asked the technician I spoke with if they've received many calls regarding this problem and he mentioned they haven't, which I find odd.
Update: Called Apple Care again just now to setup my second round of repairs, get a box, etc. The first technician asked that I speak with a product specialist, so I waited for a bit and then he came on. I was asked a bunch of similar questions and then he set my computer up for service again. I'm just waiting for a box to arrive, it should be here tomorrow.
I'll update when I get my MBP again.
I miss it already.
MBP 17" Mac OS X (10.4.7)

Cstick,
I went through similar issues with my MacBook Pro. The ultimate solution did not rely on Apple, but on self-service. Internally speaking, your MBP has a well-designed cooling system that places the CPU (primary heat source, on the back left), northbridge (back center), and GPU (secondary heat source, back right) parallel, along which a heatpipe assembly runs directly across those. At the ends of those heatpipes are copper heatsinks with a flat fan blowing air directly through the heatsink.
It's an excellent design, sucking heat away from the center, out to the heatsinks, and shooting it out the single, difficult-to-block vent in the back, and drawing air in from the keyboard region. Pretty crafty.
In the design of this, when you observe it, you see thermal sensors taped or glued to the bottom of the chassis and to the heatpipe itself. These temperature sensors are for fan regulation purposes. While the CPU has internal temperature measurement, the GPU from ATI I don't belive does - and naturally, neither does the Intel northbridge. To effectively measure the temperature of the system's hot components, the temperature sensors are employed. Unfortunately however, the sensor on the heatpipe that primarily controls the fans is on the far far outside, roughly halfway between the ATI GPU and the heatsink nearest to it.
If you'll imagine along with me, this means that the fans are basing their speed on measurements being taken from a location the farthest away from the primary heat source as possible, and in addition, close to a heatsink, which is cooling the heat, providing lower temperature readings. Optimally speaking, it would have been better to put the sensor in the center between the CPU and GPU, or at least on the inner section close by the GPU. This is not the case however, and is largely why the system is so very slow to queue up fan speed when the CPU hits high load.
In addition, some feel MBPs sometimes employ too much thermal paste, causing issues - I think this issue has been mostly resolved by now, and wasn't an issue on my initial unit.
Ultimately, disconnecting the thermal sensor located on the heatpipe is an affable solution, as this would kick the fans into full gear 100% of the time, resulting in temperatures of 88F idle, and ~140F under load. I'm pretty sure Apple would cry foul at that sort of chassis opening and internal tooling, so the above is mostly for your information.

At what temperature should I start worrying about my MBP overheating? Anytime I do video or most java stuff, it cranks up to about 180

15" 2007 MBP
I know these tend to run hot, but when it burns on the touch, I'm concerned something is overheating. Other than a dead battery (that I'm replacing), EVERYTHING else about the machine runs great. Should I be concerned, or just pay extra attention to providing free flow of air around the underside of machine and the fan output?
Thanks!
-Shane

You're my personal genius bar! Yes, the CPU is running hot. I have the iStat Nano widget and it lists CPU, GPU Diode, GPU Heatsink, Heatsink 1, and Heatskink 2 all listed separately but within about 10ºF of one another. Average temp hovers around 115ºF, but 180ºF is about as hot as it gets. Seems outrageous to me, but I'll take your word if that is perfectly normal for some processes.
Thanks for your help tonight!

MBP overheating causing body warping!

I have been experiencing some problems with my 10 month old 15" Macbook Pro. I have been aware of the computer heating up for the past couple months and I just thought it was a universal problem with MBP's. Howeever in the past week I just noticed that my screen no longer closes and locks. It is warped so that the screen no longer lays flat when shut. Also if you eyeball the side that the CD drive is on you can see that there is serious warping along the body. My only guess for this is the extreme overheating. In the past week the MBP has been acting up and I have to shut it off after about 2 hours of use to cool it off. I just got back from the Apple Store Genius bar to ask their opinion and they have never seen anything like this before. They listed a bunch of repairs they could try, but the bottom line is they would need my MBP for 48hours minimum. Which is impossible as I have Midterms coming up and I use it for my small business as well. I then got in touch with customer relations and they said they would not replace the computer without going through all of the repairs recommended by the Genius Bar.
Long story short, I am just wondering if anyone out there has experienced anything like this and if anyone has any suggestions.
I'm Screwed as it stands right now

I am sorry to have to say it, but they are lying.
The Apple Store has seen this before. It has been well documented.
They will try to say the issue is cosmetic.
A warped machine that does not close, and wobbles when you type, does not have a cosmetic problem. It has a manufacturing defect.
Keep calling and complaining.
The machines started warping when Apple switched from Titanium to Aluminum enclosures.
I thought this problem had been fixed until I got my MacBook Pro less than a month ago, and discovered it was warping just a few days ago.

MBP Overheating / Pubsub Agent?

I've recently done an erase and install of 10.5 on my MBP and ever since it has been overheating frequently and the fan is spinning almost constantly. Usually I can solve this by putting it to sleep but that doesn't always solve it.
In activity monitor, it currently shows "Pubsub Agent" is using 98% of the CPU. Could that be my culprit? Anything else I can try to fix the problem?

In activity monitor, it currently shows "Pubsub Agent" is using 98% of the CPU. Could that be my culprit? Anything else I can try to fix the problem?
Yes, it can. Try 'force quitting' the process in your Activity Monitor.
http://docs.info.apple.com/article.html?artnum=306870
-Bmer
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MBP overheating when connected to ac

Hi,
My MBP is overheating when connected to the AC. When I disconnect it and the MBP is running on battery, it seems to be ok.
Running on AC: CPU around 90 C and fan running around 6000 RPM (The black bit between the keyboard and display gets too hot to touch)
On battery power: CPU around 60 and fan running around 2000 RPM.
Running Snow Leopard 10.6.8. 2.7 GHz Intel.
Any tips?

Maybe a faulty MagSafe. It could be giving your computer too much power, causing it to heat.
I'd suggest bringing it to your nearest Apple Service and let them have it checked.

"com.apple.dock.extra" & MBP Overheating

My MBP (17" Unibody, Early 2009, 2.66GHz Intel Core 2 Duo, 8 GB 1067 MHz DDR3, NVIDIA GF 9400M 256MB) has always run very hot. According to smcFanControl, it runs at 65-75 degrees celsius normally, and 95-107 degrees when I burn dvds. I've heard countless opinions about what temps are normal and no two people say the same thing. My MBP has never shutdown due to overheating, so I have to assume it's fine.
Recently I installed Lion osx and have not found any improvements or upgrades that makes me think this OS is any better than Snow Leopard. Better yet, several developers say that Mountain Lion lacks any significant improvements over Lion. One article title said it best, "Apple Better Give Mountain Lion Away for Free!" I'll be holding out on the upgrade, and may be downgrading back to Snow Leopard. Currently I'm dealing with overheating issues, and not just when I'm converting and/or burning dvds. According to Activity Monitor, something called, "com.apple.dock.extra" and also something called "Calendar agent" keep popping up. The moment I quit these processes, the temp. of my MBP drops. Then they start-up again and the temp.goes back up. I deleted both files from their appropriate locations, and saved copies of them on my external drive just in case I needed to put them back.
Anybody know how to stop these processes for good w/o harming any system files? Could I ruin my MBP by erasing those two files? This serves me right, no doubt, but I can't remember where the "com.apple.dock.extra" Unix Executable File should be located if I needed to put it back. Can someone please give me the HD/System/Library/ . . . . . .etc. location? Now my MBP overheats the same way, but now the Finder.app appears to be the culprit according to Activity Monitor. What I mean is - if I force quit Finder when my Mac get too hot, the fans slow down and the temperature of my MBP lowers to a reasonable level. When I say temperature I'm referring to the temp. displayed by smcFanControl.app. I have no idea what the difference is between: a) the temperature of the HD, b) the CPU temp, c) the temp of "Heatsink B", d) the temp of "Enclosure Bottom", or e) the temp of "Northbridge 1." I thought I might mention that.

What do you have in the Dock? Any dynamic/animated icons (graphs, progress bars, etc.)?

MacBook Pro Randomnly started Overheating badly

Hey There,
I have a Mid 2011 Macbook Pro 15" Which i've had since Summer of 2011. I primarily use it for Music Production and DJing. Last week, my mbp started acting funny as i was watching a movie using VLC player. The screen was covered in Light green and Purple zig zaggy type lines all around, and the computer froze. So i had no choice but to do a hard shutdown (Hold the power button down). After that instance, my computer would freeze after 5 or 6 hours of use and i noticed that the fan was really loud aka working really hard. Touching the bottom of the MBP, it was really hot. That was last week. Now, when i turn on my MBP, i see the white boot up screen with the apple, but there are tons of lines going from left to right in that same light green color that i saw while watching the video. Seems to be the Graphic card was acting funny but then the spinning loading symbol came under the apple, and then the screen would turn the normal boot white color, with the apple gone, and the fan would get ridicuiously loud and then the computer would just shut down on its own. i Restarted the computer, and it booted up fine giving me an error saying "Your mbp has been shutdown cus of a problem" or something like that. After a few hours of work, the MBP just froze again. No zig zaggy lines this time, just an instant freeze. I hard powered it again but NOW, when i boot up the computer, the horizontal lines return, then the apple goes away and the fan goes crazy, and then it shuts down again. I thought maybe it's running too hot, so i stuck it in the fridge for 10 minutes... removed it.. waited for it to get back to room temp (or close to) and tried booting again but the same has been happening over and over. Im freaking out because i have a huge DJ gig next weekend, and i must have my laptop. I pray to god, non of my files were affected by this. I do have the computer backed up but its not a recent backup. Maybe a month behind...
I have a link here to a video i shot on my iphone of what it sounds like and happens.
http://videobam.com/rFhtp
After that video was shot, maybe 2 minutes after.. it just shut down on its own. I did some research online and some people are saying a MBP is designed to shut down when it gets to a certain temp. This video was shot tonight.. Tuesday morning 2:45 AM. i'm about to schedule an appointment with my local apple store, but having a computer from 2011, my apple care is gone, so i bet whatever is going to happen as far as fixing through them goes, its going to cost an arm and a leg.
PLEASE HELP ME!!

See below.
http://support.apple.com/kb/TS1473

2011 MBP Overheating with just Safari?

I'm really confused... my macbook pro didn't do this before, but for the past week it's been getting super hot when I'm just using safari.
And last night the fans had to kick in even though I only had safari and twitter open....
Is there something wrong? I understand overheating for things that require more power (like Portal 2 or World of Warcraft) but Safari??

Are you perhaps running CPU intensive things on Safari? Maybe playing some online games or watching HD videos? This could be causing a problem.
If not, I suggest you open up your Activity Monitor (found in the Utilities folder of your Applications), and see what is using up your CPU. If Safari or any application is using a large percentage, it is a software issue. If not, then it could be a hardware flaw which needs to be corrected by Apple.
Make sure you have actually closed your other Apps. Most of the time, clicking the red 'x' in the top left does not close the program, just the window.

MBP Overheating & Fan issue--strange

So...here it goes....
Quit all my applications this afternoon and closed the lid on my 15" MBP to put the thing to sleep (around 4 pm). Placed said MBP in my computer bag and headed home. Went to get it out of the bag (7:30 pm) and found that the entire compartment was really hot and the computer was screaming hot (everywhere) & the fan was running endlessly! This is the first time anything like this has happened with this laptop.
I did update the firmware to deal with the fan well over a month ago & my OS is completely up to date...
Anyone know what could have caused this?? I'm a bit concerned that this could have led to a major meltdown or battery ignition (considering the isulation of the computer bag!)
Any insights would be welcome--

I just received my MBP C2D and as soon as you hit the power button, the fans come on and don't shut off. Its extremly loud. Sounds like a jet engine. I tried everything to stop it. I installed SMC Fan Control, Fan Control, and Core Duo Temp. The fan controls seem not to affect my fan rpm speed. Core duo temp says my core temp fall between 30C and 45C always. Every few hours (like 4-6 hours) the fan will shut off for 1 sec and then start up again and sometimes stutter on and off. Occasionally the fan will shut off for awhile after like 12 hours, until my MBP goes to sleep and then when it wakes, the fan comes on at full speed and remains on forever. I can shutdown the MBP and as soon as I hit the power button the fans come back on. I ran the apple diagnostics rom cd1 and all passed. I did notice after I entered the test that the fan speed went way down until you could barely hear it but I knew it was on. I suspect that my fans are stuck on at wide open rpm. I wonder if software may have a fault that could cause this. My MBP software is all up to date. Any tricks out there to diagnose this problem or fix it? Please help!
MacBook Pro 17 C2D Mac OS X (10.4.8) Ipod Video 5G

MBP Retina bad display on external Dell display

My MBPr LCD display is great: crisp and clear.
However, when I connect my desktop Dell display, the result is washed out and difficult to read fonts.
I've tried with both mini-DVI and mini-VGA. The mini-VGA is perhaps marginally better, but in both
cases is borderline unusable.
Any clues?
Thanks!

I've a 2011 MBA, 2008 MBP and a Dell U2410 24" 1920x1200-native setup with zero problems, until I replace the aging MBP with rMBP. Now I get the same issue as the OP.
I've searched extensively, but "blurry images, washed-out colors, smudgy text" isn't very scientific/concrete so it's not easy to have a clear-cut case. On this same issue (I believe), I've found the following threads:
https://discussions.apple.com/thread/4119545
http://forums.macrumors.com/showthread.php?p=15565120
I'm trying to document the issue as much as possible, with photos taken off the display. (I've found screen capture doesn't work). They're posted at http://goo.gl/XLdMf
Further background
The same mini-DP to DP cable is used to connect MBA, rMBP (and my previous 2008 MBP) and have been in service since I've the Dell. No issues at all, except the rMBP.
I've tried HDMI-HDMI from rMBP to Dell. Same lousy display quality.
The Dell U2410 accepts DP, HDMI, DVI and VGA inputs.
On the monitor itself, I can press a few buttons to ask for display info. In both cases, the Dell reports it is displaying in 1920x1200 @ 60Hz. (So this rules out the problem of trying to display 1920x1080 on a 1920x1200 native display).
I've done a Factory Reset on the Dell, to no avail.
When the MacBookAir4,2 (2011 MBA) is connected, a range of resolutions is available:1080p, 1080i, 720p, 480p, 1920x1200x 1600x1200, 1600x1000, 1344x1008, 1344x840, 1280x1024, 1280x960, 1280x800, 1024x768, 1024x640, 960x600, 800x600, 800x500, 720x576, 640x480
When MacBookPro10,1 (rMBP) is connected, only 3 choices present itself:1920x1200, 1600x1000, 1280x800
Comparing the 2 Colors tab photos, notice how, when the rMBP is connected, the fonts have a white shadow all around the black fonts.
Comparing the 2 Display tab photos, look at the "1920" in the selected "1920x1200" option. Notice how, when the rMBP is connected, the bottom of the "1", "9", "2", "0" are smudged together

MBP overheating -bad-

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