Dual 1.25 CPU replacing a dual 1ghz

Hi!
Is there somebody who knows if I can replaced the dual 1Ghz CPU (MDD model) by a dual 1.25Ghz CPU (from an other computer that has a dead MDD computer motherboard).
Would it be a direct replacement ?
Thanks

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MDD dual 1.25 CPU DEAD- WHICH MOTHERBOARDS had COMPATIBLE CPU's?

I've just finished (after much help from Japamac, Grant Bennet and others) diagnosing what's wrong with my MDD.
*FRIED CPU.*
My Logic board is marked 820-1476-A. I found a good used dual 1.25 CPU pulled from a MDD motherboard that's labelled (the motherboard is labelled) 820-1472-A.
ANYONE know if the motherboards are compatible, i.e. if a cpu pulled from that motherboard will run on my motherboard?
If noone knows, any ideas where I could find that info?
From my research so far, some MDD motherboards with nearly similar numbers CAN interchange CPU's, others cannot.
ANY help appreciated, especially now that I've got the issue isolated.
Tom

mddthing wrote:
Have you isolated why the processors fried in the first place?
If its heat I would advise the dual 1.42GHz heatsink and using arctic silver paste...
Ah yes... the question of the millennium. What caused the first snowflake to fall...
The fans are all fine.
Here's the sequence of events:
I was experiencing a series of system corruptions & freezes forcing me to do hard shutdowns when this happened.
The only way to shut down a GUI freeze that I know of is to hard shut down (not good).
The day the full cascade happened, I'd just finished my *8th or 9th hard shutdown.*
I was trying to reboot from another partition on another disk that wasn't corrupted & repair the startup volume.
+*That's when I got a steady pitched tone upon restart. I had no idea what it meant.*+
+*After two more freezes the computer wouldn't startup at all.*+
My insurance would pay only IF I took it to a tech center, and they said "bad power supply, get another computer. It's not worth it."
I did end up get a used G5 but began to attempt a repair... I NEED a MDD for my music interface cards, circa 2000, which after my G5 purchase discovered that none of the cards work. That's my entire music interface; A MOTU 1208 with a 5 volt PCI card required to use it, and and "ADAT edit" card (same era).
The new G4 PSU (and a new power switch) got something happening, but I discovered that one of 2 seagate drives in the "front" cage was dead (only 1 year old).
Long story short, seagate sent me a new drive and, in researching the problem, I learned (*from seagate*) that their PATA barracuda drives run *really really hot.* I had TWO in the front cage, and two "pre-seagate" maxtor drives in the rear "wall cage".
*My estimation is that it WAS a heat problem, in one way or another that caused everything.*
I do music and drive the system pretty hard. There was thermal compound on the processors, but I wasn't the original owner, so I also have no idea if it was applied sufficiently, or how the computer was treated before I got it.
My concern is that the motherboard may have taken a hit as well, since when I first examined the CPU I didn't see the "black dot" I saw after attempting a startup with the new PSU. It *did start once, ran for 5 minutes and that's when I think the CPU shorted.*
Although (with the new PSU), even after that, all the fans run and the red light comes on, just no startup chime. Other than that I have no test equipment. Also running out of money.
I'm probably going to try and get a new processor I saw ($114), use only ONE drive in the front cage, get some ice goop, and hope the motherboard survived. Simply can't swing $250 for a used MDD, so I'm trying the processor swap... first.
I'm also going to find a way to install another small fan in the front cage blowing directly at the heat sink, and cross my fingers... *if I get that far*.
The fans always cycled up and down when needed, so the system WAS recognizing heat conditions.
I'm also thinking of drilling open the "cheese grater fake-holes" and setting the tower up off the floor for better air flow in general.
The heat sinks all seem to have totally different attachment methods.
Mine has 5 screws and uses a Rube Goldberg wiggy looking flange on the front.
+*I didn't know you could swap for the "copper tube" heat sink. I assumed the the 1.47 motherboard had different attachment points.*+
+*This is news to me. CAN I?*+
My sense is that something in the original "cascade failure" caused one of the 2 processors to fail. But I'm just guessing. Can't be sure until I replace it.
+*...God I love being broke...*+

G5 Dual 2.5 CPU Power PC will not boot unless I remove the Plastic Sheild.

G5 Dual 2.5 CPU with 4 gb of memory will boot everytime if I take the plastic sheild out. I bought it from a guy who would turn it on then let it sit until the fans revved up after about 5 to ten minutes. I figured out that it would boot everytime if I removed the plastic sheild. Now I am trying to find a permanent fix for this issue.
Thanks for any assistance anyone can give.

I don't think its just a plastic shield and door - there is a contact switch that signals when these are removed and the fans rev up to a higher speed. My guess is its the higher speed of the fans that's keeping things cool during the power surge of the boot stage thats allowing it to startup.
When the doors are on and the fans are kept low there must be some hardware failure that is occurring during boot up - that seems to be prevented when speeding the fans up. And after the initial boot up power surge, things run cool enough that I can safely put the plastic shield and door back on and the computer keeps running fine (it ran OK all night).
I can think of no other logical explanation at this time.
Any other ideas?
What puzzles me, is I use this computer to do some heavy 3D graphic renders and have run it intensely for days at at time with absolutely no sign of failure during operation once its booted up. I've never had a freeze or anything like that. So when its so reliable during operation, why so fragile during boot up?

DVD R replacement with dual layer

I've read there are some problems trying to replace the super drive in a dual 2.o G5 with a Dual Layer drive.
Anyone have experience with this?
Rick

Anyone have experience with this?
Yup. I've done three.
I used the Pioneer 110A DL-Superdrive ($70 at fastmac.com).
Beforehand, download some drivers from "Patchburn" appropriate to your OS version (http://www.patchburn.de), and install them.
Then swap out the drives. Simple. Your Apple manual that came with the G5 has EXCELLENT instructions on removing/installing the optical drive.
Check the ID jumper config on the rear of the new drive to make sure it matches the old one. It's probably "drive select" which is no jumper installed, but check it anyway to be sure.
After installation, boot the Mac. Install the Patchburn drivers. Restart. Rebuild permissions (THIS IS IMPORTANT!!).
Test the drive.
Say 'Wow! That was easy."
Only problems I've had was a DOA drive that simply wouldn't read or write anything. Replaced it with a new one and all was well.
BTW - with regard to existing SL SuperDrive, due to circumstance I ended up using my new DL drive in an external FireWire box the first time I hooked it up.
It worked so well that I left it external and kept the old 105 SL-SuperDrive as the internal. Now I can burn two DVD's at one time (after duplicating my copy of Toast 7, of course).
So if you have an old, dead external hard drive in a box (or Jaz, or Syquest, or tape drive - anything with a working fan and power supply) you can buy a FireWire bridge board from Granite Digital and put your new drive (or your old one) in that external box.
Personally, I like having the two opticals.
Good luck. Let me know if you have any questions. If you need details about sourcing these components I've mentioned, please send me an e-mail and I'll send you the info.

PI 7.1 Dual stack to PI 7.4 Dual stack upgrade

Hi SAP friends,
We are planning to upgrade PI 7.1 (Dual Stack) to PI 7.4 (Dual Stack). Please suggest best way to do this:
In-place upgrade PI 7.1 to PI 7.4 (Dual Stack)
New Install PI 7.4 (Dual Stack) and migrate the contents from PI 7.1
Thanks
Vikas

Vikas
There is no hard and fast rule and it depends on a lot of factors within an organisation. Refer to the following official guide from SAP on the various factors to consider, then you would be able to come up with the best decision for your organisation.
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Satellite A200 - CPU replacing

Hi
I have an Satellite A200-130 with CoreDuo 1,86 CPU and I'm thinking about replacing it for Core2Duo 2,0 mainly for ot's little better performance and virtualization options.
Anyone done that?

Generally the CPU replacement is not very easy on the notebooks.
Its trickier as the replacement on the desktop PCs.
First of all you should check if your chipset supports the Core2Duo 2Ghz CPUs.
Usually you could find such info on the Intel page.
Secondly you have to know if the BIOS would support the new Core2Duo CPU.
This is very important because the fan table which is stored in the BIOS controls the cooling modules. If the cooling modules dont work correctly then the notebook would overheat and this could damage the notebooks hardware.
Therefore such CPU upgrades are not advisable and mostly not possible

Lenovo 3k out of warranty -is it worth getting MB or CPU replaced?

Just getting started on this repair for my friend, so haven't priced out a MB or CPU replacement;
Is it worth (cost effective) to work toward replacing a cpu or mb if one or the other is defective?
The system is reliably turning off on its own within 10 seconds or 10 minutes; with most all accessories removed, and wether in the bios or booted into the utilities section of the hdd, the system will turn off after a short period of time -on a/c power-.
It's a Lenovo Product: 3000 N100 0768-DLU
any replies i'm very interested in. THANKS. Matt

Mark_Lenovo wrote:
narukthul,
Sorry you had a bad experience. Can you explain a bit more? It sounds like you had some service while still in warranty, that may or may not have been related to the GPU, and now you are having these symptoms.
How far outside of warranty are you?
When was your last repair that you reference and when did these symptoms occur?
Best regards,
Mark
i had my display replaced with the rubbishy refurbished parts lenovo uses to repair warrantied computers. It came back unsurprisingly worse off than when i sent it in. I believe they had attached the display cable incorrectly to the motherboard causing the display to flicker and to display a garbled picture as well. it took 3 more send ins to the lenovo depot for them to fix it and by the last time i got my computer back my warranty was expiring then less than a month later my display picture would consistently become more garbled overtime both when viewed via laptop display and external monitor.
I did not have these issues before sending my computer in for "service" The fact that external monitor display was also garbled beyond recognition indicates either damaged GPU hardware or software. Operating under the assumption that the video driver software had become corrupted I tried several different driver versions and even uninstalled and reinstalled from scratch to no avail. Given that a reinstall of the video driver was inneffective I am confident that when I sent my computer in for "service" the technicians attaching the display cable to the motherboard caused damage to the GPU over the 4 times I had to send my computer back in because of the loose display cable. Essentially I sent in a working computer for service and lenovo sent me back a paperweight.

Quicksilver 2002 1GHz DP - problems with replacement of dual processor card

About 9 months ago my QS2002 seemed to be running slower & would quit DVD player if I tried to start it in full screen; it would play broken green lines before doing so - although it seemed to be OK if I started in small view & switched to full screen once it had got going. Eye TV would randomly freeze too. Diagnostics said it had failed - the external cache was the problem. In "About this Mac" the 2MB L3 cache wasn't showing up. I spoke to a few people & they all thought it pointed to 1 of the processors failing on the daughter card so I kept an eye on eBay to try & get a replacement- which I did a few weeks ago.
I followed Sonnets instructions on how to change the processor card but on start up it only started for long enough to see that it had failed diagnostics with the same message as previously. It then had a kernel panic & refused to restart - either not progressing past the apple sign with a frozen cog or freezing if it got as far as OSX. I took out the replacement card & put the original one back. It booted without problem & was now registering the L3 cache & had passed the diagnostics test. I don't really understand why or how this was possible - did the card just need reseating?
The seller was very helpful & sent another card. - this time it had a kernel panic as it started & brought up something resembling the command page in Windows saying that there was a graphic chip error.
At this point I gave up, replaced the original card - which is still booting & passing diagnostics.
So are all replacement QS2002 1GHz DP cards not the same - any ideas why neither of these worked (the labels on them were very similar to the original)? Would I have similar problems if I tried an upgrade Sonnet or Newertech card? Did I miss something when changing the cards over & why did taking a card out and replacing it fix its external cache problem?

Hi-
So are all replacement QS2002 1GHz DP cards not the same -
There will be different production runs, as well as different assembly lines, different component suppliers, different runs of processor chips.
Otherwise, architecturally, they are all the same.
Any OEM QS daughter card of any speed can be used in any QS.
any ideas why neither of these worked (the labels on them were very similar to the original)?
Possibly they were already no good.
The DP 1GHz is an excellent processor, but failure of one processor chip or cache is not that uncommon.
Further, used parts are always a risk as to health.
Would I have similar problems if I tried an upgrade Sonnet or Newertech card?
You should not, as long as the proper firmware patches are run prior to installation.
Did I miss something when changing the cards over & why did taking a card out and replacing it fix its external cache problem?
It could very well have been the process of removing and reinstalling that solved your problem.
Reseating of the CPU daughter card is a proper troubleshooting step, and can solve problems due to connection issues within one or more of the 300 pins.......

1 CPU Cutting Out (Dual G5)

Well it is the strangest thing, but seems to most reliably happen when there is an automated web update of something from Adobe. Odd coincidence?? Dunno. It has happened 3 x and 2 of those were right after accepting an Adobe update.
The odd thing is that the Mac will run on 1 CPU, just notably more slowly which is generally the give away.
Is this a sign of impending CPU failure? Are there places I could get a replacement CPU if it comes to that?
My dual 2.0GHz G5 is a very early October 2003 model.

Last Summer I had a problem with my Power Mac G5 dual 2ghz. I had deleted some files and then Virex since it was consuming large amounts of cpu and the machine was still running real slow. It turns out that it wasn't the files that I had deleted but one of the cpu's had died. Techtool would crash during inspection of the machine and attempts to reinstall os x would cause the system to crash.
Anyway, it cost a little over $700 to have it repaired at apple repair! I wasn't quite prepared for that but given that it was pay for it or throw it away, I opted to pay for it. It was worth about $1100 (problem free) at PowerMax as a trade in but after the repair it wasn't worth trading. So I still have it and long for an Mac Pro.

LAPTOP Dual Graphics Card CPU scailing (with bash script)

Hey all, basically, getting Arch working with my laptop was a pain due to the lack of power options and graphics control, especially using the open source drivers. My laptop would overheat due to both the dedicated and integrated graphs cards would be running at the same time and my CPUs were running at 100%. After a long while of looking around, I finally found a solution, and being the nice guy I am, I decided to make a script to streamline the process for most people. It mounts the debugging filesystem, adds it to fstab, installs the necessary tools, loads the correct module, and also lets you change power plans, as well as check on battery, graphics card status, and cpu status. this is basically version one so i guess ill add a bit to it over time.
*** MAKE SURE KMS IS ENABLED ON YOUR KERNEL GRUB/SYSLINUX LINE EG: "radeon.modset=1"
******ERROR CHECKING:
if you have the debug fs mounted already, unmount it with umount /sys/kernel/debug
if you get an error modprobing, check what modules are supported from your cpu with ls /lib/modules/$(uname -r)/kernel/drivers/cpufreq/
with the debugging fs mounted, running cat /sys/kernel/debug/vgaswitcheroo/switch to find out what your graphic adapters are named and if needed replace the IGD and DIS with yours
you may have to modify some parts of the program, but i tried my best to make it as easy as I can
Installation:
copy it and save it as foo.sh
chmod 777 it for good measures
RUN AS ROOT
chmod 777 foo.sh
./foo.sh
#! /bin/bash
#By: Dominic dos Santos
#[email protected]
#mount -t debugfs none /sys/kernel/debug --mount debugging fs
#echo"IGD"> /sys/kernel/debug/vgaswitcheroo/switch && echo"OFF"> /sys/kernel/debug/vgaswitcheroo/switch --onboard graphics
#echo"DIS"> /sys/kernel/debug/vgaswitcheroo/switch && echo"OFF"> /sys/kernel/debug/vgaswitcheroo/switch --dedicated graphics
#cpufreq-set -c 3 -g powersave # --powersave cpu freq set
#cpufreq-set -c 3 -g performance # --performance
#cpufreq-set -c 3 -g ondemand #--...
#!!!PLEASE NOTE!!! I am using a quad core laptop, therefore I have the '-c 3' argument. Cores are as such: 0 1 2 3
#Dual core would be '-c 1', 6 core would be 5
echo "RUNNING THIS WIH X RUNNING WILL NOT MODIFY THE GRAPHICS CARD SETINGS"
#checking if debugging fs is mounted, if not, mounting.
if [ -f /sys/kernel/debug/vgaswitcheroo/switch ]; then
echo "DEBUGFS is mounted, continuing wih program"
else
read -p "Press ENTER to mount the debugging directory (REQUIRED)"
mount -t debugfs none /sys/kernel/debug #the mount fs command
echo "Add to fstab?"
read fs
if [ "$fs" == "y" ]; then
echo "debugfs /sys/kernel/debug debugfs 0 0" >> /etc/fstab #add the required line to the fstab
fi
read -p "We are now going to install the cpu drivers and load the required modules."
pacman -S cpufrequtils
echo "Do you have an [a]MD or [i]ntel cpu?" #load the [correct] module now
read input
if [ "$input" == "a" ]; then #AMD
modprobe powernow-k8
elif [ "$input" == "i" ]; then #INTEL
modprobe acpi-cpufreq
fi
echo "REMEMBER TO ADD acpi-cpufreq cpufreq_powersave cpufreq_ondemand cpufreq_performance to your rc.conf beside MODULES=( ****** FOR INTEL CARDS ONLY!"
echo "OR powernow-k8 cpufreq_powersave cpufreq_ondemand cpufreq_performance ****** FOR AMD CPU's ONLY!"
fi
#menu
echo -e "Welcome to my CPU and Videocard Power and Performance Switcherooer"
echo " 1: Powersave"
echo " 2: On Demand"
echo " 3: Performance"
echo " 4: Check Status"
echo "Please select an option"
read input
if [ "$input" = 1 ]; then
#Powersave
#Set CPU to "Powersave", set VGA to onboard and disables one not being used, ie. the dedicated
cpufreq-set -c 3 -g powersave
echo "IGD" > /sys/kernel/debug/vgaswitcheroo/switch
echo "OFF" > /sys/kernel/debug/vgaswitcheroo/switch #the "OFF" infers to cutting the power to the one that isn't selected
elif [ "$input" = 2 ]; then
#On Demand
#Set CPU to "On Demand", set VGA to onboard and disables one not being used, ie. the dedicated
cpufreq-set -c 3 -g ondemand
echo "IGD"> /sys/kernel/debug/vgaswitcheroo/switch
echo "OFF"> /sys/kernel/debug/vgaswitcheroo/switch
elif [ "$input" = 3 ]; then
#Performance
#Set CPU to "Performance", set VGA to the dedicated graphics card and disables the onboard
cpufreq-set -c 3 -g performance
echo "DIS"> /sys/kernel/debug/vgaswitcheroo/switch
echo "OFF"> /sys/kernel/debug/vgaswitcheroo/switch
elif [ "$input" = 4 ]; then # status check
echo " 1: Battery"
echo " 2: Graphics Card"
echo " 3: CPU Info"
read status
if [ "$status" = 1 ]; then #battery
acpi
read -p "Press Enter"
elif [ "$status" = 2 ]; then #battery
cat /sys/kernel/debug/vgaswitcheroo/switch
read -p "Press Enter"
elif [ "$status" = 3 ]; then #battery
cpufreq-info
read -p "Press Enter"
fi
fi
Last edited by imagoose (2012-02-15 22:51:13)

Thats great, thank you. I have an older Dell Studio XPS 13 which has NVIDIA Hybrid SLI. Its current power usage in Arch is killing me (about an hour and a half, where as i can get 3-4 hrs in win7). Right now I am doing all the work through the integrated graphics card, per my xorg.conf, but i dont think i've managed to disable the discrete card yet. When I get on the laptop I'll let you know how it goes.

Dual G5 Powermac - CPU chirp/whine after 10.4 upgrade

At home, I have a Dual G5 1.8 GHz Power Mac. At work, I use a Dual-G5 2.0 GHz power mac.
With both of these machines, after upgrading to 10.4, I can hear the machine making high-pitched noises. The Dual-1.8 GHz machine `chirps', while the Dual-2.0 Ghz machine emits a loud, steady, high-pitched `whine'.
Neither of these machines displayed this behavior when running Mac OS 10.3.x.
The only workaround I've found is to use the Processor Control Panel (Part of the CHUD developer tools) and do either of the following:
1) Turn off the second cpu via the processor control panel
2) Disable "allow nap" via the processor control panel
Both succeed in stopping the chirp/whine, but I've been using option (2). The only disadvantage is that "allow nap" is always re-enabled after a reboot. The setting doesn't stick.
The chirp/whine occurs if the Processor Control panel isn't installed.
Has anyone experienced something similar to this? Is there a better fix than the processor control panel?
Many thanks in Advance!
PowerMac G5 - Dual 1.8 GHz Mac OS X (10.4.7)

Hi, Steve. Welcome to the Discussions.
I have a PM G5 Dual 2.3 GHz and have no such issues after installing 10.4.7. While I've installed the Xcode tools, I elected not to install the CHUD tools.
Some ideas for you:
1. See "Power Mac G5: I hear buzzes, beeps, or humming" to see if the sound samples therein match what you're hearing.
2. Check the SMART diagnostics for the hard drives on both machines, esp. the 2x1.8 that "chirps" as some hard drives make such a noise to indicate they are failing.
3. Run the Apple Hardware Test (AHT) that came with each machine. See my "Apple Hardware Test" FAQ for comprehensive advice on using the AHT in troubleshooting.
4. Search or post on the appropriate PM G5 Discussions to see if other users have had similar experiences.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link.

Is there any way to monitor CPU temp without Dual Core Center

I hate Dual Core Center it has done nothing but lock my system up is there any alteranative to monitor CPU temp/Fan speed

Quote from: Maesus on 21-March-07, 23:34:06
I use speedfan... but for Core 2 Duo, I don't think I have to worry about the CPU temp anymore... they are really coooooooooooooll
Does anybody have an idea what the optimal temperature range for core duo cpu:s are? I used to have an Athlon XP, which was typically 65 °, now the my E6600 is running at 35-40 ° [celsius]. But where's the critical temperature where it burns?

Dual CPU's! Dual CPU's??

Lo all,
I have dual CPU system, 2x Intel Pentium III, 866 Mhz.
How do I know Arch uses both CPU's, and does the stock kernel support SMP?

Yes, the default kernel supports SMP.
You can verify that it's using both processors by,
cat /proc/cpuinfo

G5 Dual 1.8 Processor Replacement

I have a Power Mac G5 Dual 1.8 Ghz Model M9454LL/A. I have a bad dual processor and I need to replace it. I've seen videos on the processor replacement and it appears to be a simple process, however the videos never show how to remove the plactic cover that has "G5" printed on the top and bottom of the cover so that I can get to the processors. Anyone know how to remove this cover??

However, I was kinda nervous about getting a hand drill in there!!
Man, that's scary.
A bit too far, and one has aluminum shavings in their logic board.....
For future reference, and for any that might see this thread, the correct way, +the Apple way+, is to cut the head of the rivet pin off with an Xacto knife, then insert the treaded end of a cup hook into the rivet, using the cup hook and a dowel (as a handle) to pull the rivet out.

CPU scaling on dual-layer powerbook

I've been recently looking into buying a powerbook and wondered if owners of the new dual layer PB could fill me in on its new power management scheme.
I understand Apple removed user control on CPU frequency scaling in their latest model. I would like to know if the CPU still reduces its frequency when plugged into AC power. I plan to leave the computer plugged in most of the time and it would be nice if it would still clock down to reduce heat and noise.
Also, what control do you still have over power management, can you control the video hardware's power saving?

The DL Powerbooks support both divide-by-two mode, AND, for the first time, divide-by-four mode. That is, the processor will set itself to 1.67GHz, 833MHz and 417MHz as needed for the particular task at hand. There is no user control over this switching; it is automated. Previous Powerbooks with 7447 processors have simply supported divide-by-two, e.g. 1.5GHz or 750MHz, with the user having the option to choose 'highest', 'automatic', or 'reduced'. The source for this information is the developer notes on the Apple Developer Connection website.
Interestingly, I had understood only the 7448 processor from Freescale was supposed to be able to support divide-by-four, and this was the processor that many speculated would be in this revision of Powerbook -- Freescale's first 90 nanometer G4 chip. However, it was not to be and this computer once again has a 7447 G4. I don't know how Apple has implemented it on this one -- perhaps the new ASIC controller chip that was allegedly causing trouble in testing.

Dual 1.25 CPU replacing a dual 1ghz

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