RAM Upgrade Issues

I recently went through the motions of upgrading my mid-2007 24" iMac from 2gb to 4gb. The problem however is that my computer wont start up with both new sticks, only when one original (1gb) and one new (2gb) are present. Ive tried both bay combinations, and it will start if the 1gb is in either bay, and one 2gb vice versa- however when both bays have 2gb each, I only recieve a blank screen (though I can feel the hard drive spinning).
Is there a solution Im missing?
Thanks,
VM

There are only three possible things wrong:
Incorrect RAM (verify the specifications)
Unseated RAM (remove and reseat per Apple's instructions)
Failed RAM (yes RAM can and does fail)
If you happened to have used Kingston's Value RAM that is probablematic too on your vintage machine. Spend the money and buy higher quality RAM such as OWC (www.macsales.com) or Crucial. While most others sometimes it's not worth trying to save a buck.

Similar Messages

24" iMac (Primo 2009) strange RAM upgrade issue

I have a 24" iMac (Primo 2009) at work. I been granted a RAM upgrade by the IT department and have received 2 indentical 4 GB modules.
The 24" iMac (Primo 2009) uses 1066 MHz DDR3 modules and supports up to 8 GB RAM in 2 slots. I have purchased RAM from this source http://www.dustin.dk/product/5010642132/corsair-4gb-ddr3-1066mhz-1x4gb-so-dimm-i mac-macbook-macpro/#intcmp=searchProvider_SiteSeeker (Corsair Mac Memory so they SHOULD be fine.)
Here's the issue:
I had 2x 2GB modules. I have taken both out.
I have inserted the new 2x 4GB modules but the machine refuses to boot. It gives off 3 beeps-interval-3 beeps-interval (repeats).
I took out one of the 4GB modules from slot B. It boots.
I inserted the one I removed in slot B again so we're back at 8GB. same beeps. No boot.
I switched the 2 4GB modules from slot A+B around. Now beep-interval-beep-interval (repeats) No boot.
I inserted one 4 GB in slot 1, and one of the old 2 GB in slot 2. It boots with 6GB RAM.
I inerted only the one that won't boot when in slot B in slot A, beep-interval-beep-interval (repeats) No boot.
OK - so logical deduction tells me one of the new 4GB RAM modules is defective. No matter what configuration, booting fails with that specific module inserted, though there are different beeps. I also know tha both slots work since the machine works with 6 GB RAM (2+4).
So I called Dustin, and since we're a big customer they sent a new moduel for free. But, I have the same isssue with the new module!! What are the chances I have recived 1 working and 2 defective modules? not big right? So my iMac seems fine with the old 2GB modules and one of the new 4 GB modules, but says no to the 2 other 4GB modules.
YES - I have tried resetting PRAM and SMC to no avail. Any clue?

Switched the 2 modules around, so there's now a 2GB in slot A and a 4 GB in slot B. Still works fine
Model Name:
iMac
Model Identifier:
iMac9,1
Processor Name:
Intel Core 2 Duo
Processor Speed:
2,93 GHz
Number of Processors:
1
Total Number of Cores:
2
L2 Cache:
6 MB
Memory:
6 GB
Bus Speed:
1,07 GHz
Boot ROM Version:
IM91.008D.B08
SMC Version (system):
1.45f0

Ram upgrade issues - am i really this dumb?

I just purchased a pair of ram modules, tried installing them several times - different slots etc, but they are not recognized - I'm pretty sure they're the right type, but maybe I'm mistaken. Any help would be appreciated - I'm banging my head against the wall on this one. A ram upgrade should be a no brainer no?
Anyway the ram i bought is 2x 1gb ddr2-533 dimm 4200.
I have a G5 quad 2.5 - currently has 4x 1gig modules and 2x 256mb modules.

You've posted in the Mac Pro forum. Are you asking about RAM for a G5 Quad or for a Mac Pro?
G5 Quad: 240 pin DDR2 533 MHz PC2-4200 ECC or NECC SDRAM
Mac Pro: 240 pin DDR2 667 MHz PC2-5300 ECC (FB - fully buffered) DIMM and should have an Apple approved or equivalent heat sink.
Both machines require RAM be installed in pairs. For best performance in the Mac Pro RAM should be installed in quads.
Why reward points?(Quoted from Discussions Terms of Use.)
The reward system helps to increase community participation. When a community member gives you (or another member) a reward for providing helpful advice or a solution to their question, your accumulated points will increase your status level within the community.
Members may reward you with 5 points if they deem that your reply is helpful and 10 points if you post a solution to their issue. Likewise, when you mark a reply as Helpful or Solved in your own created topic, you will be awarding the respondent with the same point values.

Early 2008 24" imac ram upgrade issues

Hi everyone. Hope you guys can help diagnose a problem I have with my imac.
It's an early 2008 24" imac with 3.06 Ghz processor and an NVIDIA Geforce 8800 GS 512 graphics card.
After buying Empire: Total War I thought it best to upgrade the 2GB RAM to 4GB, and purchased 2x2GB sticks 800 Mhz 6400 DDR2 SDRAM.
When they arrived I put them in and the system booted up normally. I could surf the net ok, but when it came to watching a video on youtube full screen, or playing a game, it would cope for 30secs-1min and then the spinning coloured wheel would show. I'd then hear noises that sound like a cd trying to eject then the system would hang. One of three things would then happen:
- it would automatically reboot showing the multi-lingual startup message that the system was not shut down properly
- a grey blank screen would appear and not change
- the grey start up screen would appear with the Apple logo and spinning circle, which would then stop spinning and not change.
If I manually rebooted I just get a black screen and can only hear the fans softly spinning.
I've tried swapping the ram sticks but get the same as above. It will boot and work normally with either one of the 2GB ram sticks installed on it's own. It will also work normally with the original 2x1GB sticks installed again.
I don't get the 3 beep warning at startup.
Any thoughts on why this might be happening? Would the graphics card be the reason for this issue?
I'm not sure if these are related but a few weeks ago I noticed that the brightness would randomly change from normal to half-brightness then back to normal. These would change every few minutes or so and isn't dependent on what programmes I have running.
I've also recently noticed that the top and back of the imac is getting quite warm to the touch and no don't leave the system running when not in use.

Hello,
Have you blown the dust out lately?
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
iStat Menus...
http://bjango.com/mac/istatmenus/
And/or iStat Pro...
http://www.islayer.com/apps/istatpro/
EDIT: you won't find iStat Pro at BDAqua's link any longer. (No longer supported by the developer, and not completely compatible with Mountain Lion, but most of its features should still be working.) It's here
https://www.apple.com/downloads/dashboard/status/istatpro.html
Do you have a link to the exact RAM you bought?
That grapics card is known to be a problem, but the brightness issue seems more like the Backlight or Inverter.

Macbook Pro 4.1 RAM Upgrade Issues

Hello Apple Community. I recently decided to upgrade the RAM on my macbook pro 4.1 (15", early 2008, 2.5 GHz). I purchased and installed 4gb of Mushkin memory (2x2GB PC2-5300 SODIMM), and the computer booted up just fine. When I go to "About this Mac", it still shows 2GB of RAM, 2x1GB. When I click on "More Info" the same holds true while specifically looking at the memory. For some reason my computer is reading each 2GB card as a 1GB card.
Any suggestions as to what may be the issue?
Thank you in advance.
PS. I've been searching forums and the web for the past 2hrs in hopes of finding an answer.

Okay, I will try this out. Previously I had done something similar to that which you suggested, which leads me to think that the RAM possibly could've been mislabeled and I was given 2GB (2x1GB RAM). I took one stick out and booted up the computer and my mac really took its time starting up. When I checked the "About this Mac" section it now said 1GB of RAM. I'll try again with both cards, but it looks like I will be sending them both back for replacements.

Ram Upgrade Issues: Mid 2009 Macbook Pro 2.53GHz

I recently upgraded my Macbook Pro RAM from the native 4G (2x2G modules) to 8Gb (2x4G modules). Restarting didn't seem to create any issues, everythig was zipping along, and all appeared well. A few minutes into basic navigating the screen dimmed and I was prompted to restart?! I restarted and all seemed well again. BUT, when I opened my browser (didn't matter which one) it would prompt me sixty seconds later that the application "crashed" and I needed to restart it (I-photo, I-tunes, etc. - didn't matter) NEXT UP - I would get get kicked out of applications that I had to Log into (Gmail, on-line banking, etc.) Each time the screen would dim like a shade was being pulled and I would be prompted to restart?! I replaced the 2 - 2G modules and all is well again. The memory was purchased from a reputable vendor and the specs. were all matched. ****I have not had the opportunity to run any Apple Hardware tests yet - I was hoping that maybe someone else had similar issues?! Any ideas and info. are greatly appreciated!!!!!!
Currently running Lion (unhappily... - but at least the 8G made the rainbow wheel spin faster!!)
Thanks!
TL

try a PRAM reset next time you install the memory.
also make sure your system sees it. simply go to  upper left corner, about this mac. it'll tell you how much ram your computer is reading.
Contact that vendor about your issue.

8770w - 32GB RAM upgrade issues

Hi there, I just upgraded my RAM memory on my 8770w from 16GB to 32GB using corsair Vengeance CMSX16GX3M2B2133C11 and was really hard to my laptop to recognize the whole memory and when it got it. after several minutes i always get the bluescreen with different kind of errors... i already used the HP PC Hardware Diagnostics UEFI and the RAM memory is good. and i already updated the BIOS. but the same result.
Any help please?
I'll really appreciate
Thanks

Hi,
Definitely compatibility issue. Please use the following site to scan your machine. It will tell you exactly what you need and compare with RAM you bought.
http://www.crucial.com/usa/en/systemscanner
To give better result, please only use the original RAM when scan.
Regards.
BH
**Click the KUDOS thumb up on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

Intel-Based 08 Aluminum iMac(2.44 ghz) Ram upgrade issues...

I bought 4 gigs of ram from newegg (2x2gb sticks). When I put them both in, the computer just wont boot. The fan goes on, the screen remains black, and the fan stops in a few seconds. When I tried another configuration, a new ram stick (2gb) and the old one(1gb), the computer boots up perfectly and shows me that I have 3 gb of ram. Also, I tried this configuration with both sticks of 2gb ram so i think this issue is not related to the new ram. The ram I bought was:
Kingston 4GB (2 x 2GB) DDR2 800 (PC2 6400) Dual Channel Kit Memory For Apple iMac Model KTA-MB800K2/4G
I made sure that my EFI was up to date and im running 10.5.5
Thanks
Message was edited by: Meshal

Meshal wrote:
I tried all 4 ram sticks in both slots and even tried switching the ram sticks around. I did clean them though. The computer will only boot up with a new 2gb ram stick and an old 1 gb ram stick. I think its something with the computer rather than the ram sticked themselves.
Yeah I'm with Dennis on this one. It sounds like you are using the wrong memory. Symptoms are similar to what this user had: http://discussions.apple.com/message.jspa?messageID=8230546#8230546
I use Kingston in my imac and they work perfectly fine if you buy the correct ones. Been using them for years.

Ram Upgrade issues can't boot with 8 gb but can boot with 6gb?

So my macbook pro already has 4 gb of ram, but i always heavily use my electronics, so i wanted to upgrade my ram. I bought the ram, it came in the mail, but when I tried it out, I got stuck on the white boot screen. The circle spinning got stuck.
HOWEVER, when I only used one stick in conjunction with one of the 2 gb sticks, everything works just fine.
Does anyone know whats wrong?
Macbook Pro 13" (mid-2010)
2.4 ghz Core 2 Duo
4 gb ram
250 gb HDD
this is what i purchased:
Click Here

Ah okay, I only bought the mushkin brand because it was little cheaper.
btw I uploaded a video so you can see my problem
http://www.youtube.com/watch?v=HHm3HWMxt60&feature=g-upl&context=G27ac6bfAUAAAAA AAAAA

Lenovo G50-70 Laptop (59-417110) Ram Upgrade Issues

I recently purchased Lenovo G50-70 Laptop (59-417110) and it has in-built 2GB DDR3 1600MHz Samsung RAM.
I have Windows 8.1 64 bit OS installed.
I had to increase the RAM capacity to 6 GB. Hence bought Kingston 4GB 1600MHz RAM - http://www.kingston.com/dataSheets/KVR16LS11_4.pdf
After installing additional 4 GB module from Kinston, windows is restarting after seeing logon screen by showing "Windows ran into a problem notification"
Is this RAM module compatible with this lenovo model? I had researched inside lenovo support and changed maximum memory from msconfig, changed power settings, still no use.
What should I do now?

hi deljojoseph,
Welcome to Lenovo Community Forums!
Can you try removing the old module, the 2GB.
check if your system will run with just the New RAM.
After that
Try it also with just the old RAM an check.
Let me know your findings
Cheers!
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
Follow @LenovoForums on Twitter!

IMac RAM upgrade issues

I have a 2007 iMac(2.4 Ghz "20 running Snow Leopard) with 1 MB of RAM. I recently purchased 4 MB of Kingston RAM from NewEgg (2 x 2 MB). When I put both 2 MB sticks in the slots, the computer does not start up (it shows the blank screen and you can hear the hard drive whirring, but nothing else). I can only get the computer to start if I have the original 1 MB stick in the left slot and one of 2 MB sticks in the right slot. Is there anything I'm overlooking?
And yes, I did the upgrade properly.

While memory is supposed to be able to run slower than rated, I've always thought it's best to get the memory that is defined for your system. I would return it and get the 667Mhz version. Both OWC and Crucial are also respected sources for mac memory.

RAM upgrade Issue

I am using HP G42-356TU 64 bit I3 Laptop.Right now i have existing 4 Gb ram(2, 2) on each slots and according to my intel board info max ram suppoted is 8 Gb(4 4) on each slot.
When i used 4 gb ram on one slot and on another 2GB my existing OS is not loading. As per to local service Centers they said you need to load the OS again and one more thing the bios is showing the right ram ie 6 GB(4+2) ,
when I put my ram again ie 2 Gb on both slots. its working fine as previously But when ram is upgrdaed from 2 Gb to Gb on one slots my Existing os is not loading.
Any specific settings needs to be update.Please through some light here for enhancement.
This question was solved.
View Solution.

Hi Kevin,
Great! I'm glad this helped. Please let me know if it arrives and still not working.
↙-----------How do I give Kudos?| How do I mark a post as Solved? ----------------↓

Issues with sleep/wake feature after 16GB RAM upgrade in my MacBook Pro. Any thoughts?

Just installed a 16GB RAM upgrade in my MacBook Pro and now it doesn't wake up on it's own when I open the lid. I have to press the power button. It works fine with a smaller RAM upgrade.
I've tried putting in just one of the 8GB modules and the sleep/wake feature works as normal so there isn't a problem with the RAM modules that I've bought (Crucial.com). I've also put in a combination of Apple's original RAM and the new ones to make 10GB (8GB + 2GB), and the sleep/wake feature works on that too. Put both 8GB modules back in and the MacBook doesn't wake up when I open the lid, I have to press the power button to wake it up. The MacBook itself works fine, super fast and the memory is recognised on 'About This Mac', the sleep/wake issue is the only problem I'm having with the 16GB RAM.
Any thoughts on this? Has anybody else had this sleep/wake issue like this when upgrading RAM?

I upgraded my early 2011 MBP to 16 gigs with Crucial. My machine would not sleep properly, because when I tried to wake it, it would wake from its hibernate image file. This is the issue I've seen here in this list.
I tried all the suggestions I saw on these groups. Nothing helped. I contacted Crucial, who suggested that if their RAM was defective, they'd replace it per their warranty process. I needed some proof it was their RAM causing the problem.
I put the original 8 gigs RAM back in the machine (2 4 gig sticks), and it behaved normally. I then put one stick of Crucial RAM in, all by itself. The machine behaved normally. I put the other stick of Crucial RAM back in, and took the first one out. The machine would not properly sleep and wake from sleep. This proved that one stick was causing the problem, and the other was not.
Defective RAM!
I then requested and received an RMA from Crucial to send the defective RAM back. They paid shipping. I got new sticks of RAM about a week later. These new sticks of RAM work properly. No sleep issues.
I'm surprised and disappointed to say that this is not the first time I've received defective RAM from Crucial. I've purchased from them for years, and had GREAT service and received high quality products. The past couple years my experience has been different.
I'm still pretty steamed about this, as I spent a great deal of time trying to diagnose the problem and fix it. I don't really have that kind of time to waste. My expectation was that their RAM was high quality, and unlikely to be at fault.
Perhaps this is just a bad batch of RAM. I get that. I can forgive them once. But this has happened twice in the past three years. I'll look elsewhere for my next memory purchase.
Keep in mind that their customer ratings are generally very high. My experience is probably isolated.

Memory modules can we use for RAM upgrade of HP Pavilion dv5-1198de??

What memory modules can we use for RAM upgrade of HP Pavilion dv5-1198de??
Max RAM? Vista? Windows 7?

I can't find a dv5-1198de but I did find a dv5-1198er which should be similiar. It states up to 8 gb of ram. HERE
I would try www.Crucial.com for suggested memory ,you can use their Scanner Tool to let it detect what you have and what you can upgrade/replace with.
******Clicking the Thumbs-Up button is a way to say -Thanks!.******
**Click Accept as Solution on a Reply that solves your issue to help others**

24" iMac and 3GB RAM limit issues

I have a legitimate concern with the 24" iMac and wanted to know if anyone else thinks it's an issue. Read Apple's tech note on late model 2006 iMacs including the new 24" model.
http://developer.apple.com/documentation/HardwareDrivers/Conceptual/HWTechRAM/Articles/RAM_implementation.html#//apple_ref/doc/uid/TP40003899-DontLinkElem entID5
In order to use RAM in an interleaved fashion it states you must use matched pairs. Meaning same size and type. SO.....if the new iMacs will take a 2GB SO-DIMM then why won't it register 4GB total? You can configure your new iMac with 3GB of RAM but it won't be interleaved. On top of that 2GB SO-DIMMs are super expensive in the +$700 range. More then MacPro's FB-DIMMs.
I don't see anyone talking about this but it seems to be a legitimate concern.

That IS the point, what person paying $2000 for a computer would be willing to pay another $1500 for a 4GB RAM upgrade? I just think right now it's hurting Apple's sales of the 24". The 24" encroaches on the prosumer market and at this point in time an affordable 2GB of RAM may seem adequate now but most likely not in 6 years. Which is how long I had my Digital Audio Power Mac. So I think anyone in the prosumer market NOW, like myself, looking for a machine that will last a few years may look away from the 24" and steer toward the Mac Pros. My needs fall squarely in between the 24" iMac and Mac Pros but unfortunately my budget does not. I could live with the 24" even with the expensive cost of the 2GB SODIMMs. I would in fact wait until the prices fell. What I can't live with is the fact that the iMac will only ever be able to use an uninterleaved 3GB when the possibility of an interleaved 4GB seems to be there. I was only able to keep the Digital Audio because I squeezed every ounce of life I could out of it because of various periodic upgrades.
Reluctantly I'm going with the Mac Pro but I REALLY wanted to get the 24" iMac. Thats all.

RAM Upgrade Issues

Similar Messages

Maybe you are looking for