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Normal CPU Temps for Power Mac G5?

Hello All,

I just wanted to know, since Im very curious about my temperatures since Im really trying to avoid the Logic Board failure due to Lead-less solder. Ive installed heat sinks on my DDR-SDRAM cards (x4 1GB Apple OEM chips (they bear the Apple Logo and have " Memory Module" on the stickers) I got four of these heat sinks: http://www.newegg.com/Product/Product.aspx?Item=N82E16835110105 and they work extremely well, however I dont possess the required tools to remove the processors to apply Arctic Silver 5 Thermal Paste, and these processors have not been budged one bit since purchase date. This is a Second Generation June 2004 Power Mac G5 DP 1.8GHz. The Processors temperatures are typically around 150ºF-160ºF Im using iStat Menus. Fans arent even noticeable. Nothing makes noises at all, I was just wondering if this is normal activity and if I need to take the heat sinks off and apply AS5 paste. If temps go above 160ºF, I pull the side panel off the Power Mac as well as the air deflector and I remove the "G5 plate" from over the processors and let it vent (still running normally, Im not sleeping it or shutting down) and processor temps come down to 130-135ºF. Should I worry about logic board failure if I leave them at 160ºF (both CPU A and CPU B are always the same temp (usually within 2ºF of each other) This is my only Mac other than an over clocked eMac (900MHz from 700MHz) and a DP 1.0GHz Xserve G4. I want to keep this G5 in working order as long as possible. Thanks so much. Also, by the way I have been dusting this Power Mac out every week since day one using compressed air. There has never been anything more than the slightest amount of dust in this machine, sometimes no dust at all. This machine is well looked after. Thanks in advance.

Regards.

—Matthew—

eMac 700MHz, Power Mac G5, APEBS(802.11g), 32GB iPhone3GS, 160GB iPod, Xserve G4, Mac OS X (10.5.8), eMac:OC900MHz:1GB:500GB:AP:BT:SD:Leo PowerMacG5:Dual1.8GHz:4GB:4TB:APE:BT:SD:Leo

Posted on Feb 2, 2011 4:23 PM

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Posted on Feb 2, 2011 4:33 PM

That sure sounds like they're running too hot, here's my Teperature Monitor readings from a Quad G5 if it helps...

User uploaded file

Have you tried AHT & Thermal calibration?
7 replies

Feb 2, 2011 4:46 PM in response to BDAqua

Hello BDAqua,

Thats a G5? The window says QS (quicksilver?) 2002 (definitely Power Mac G4 era) and G4....but anyhow, yeah I thought so. I guess Ill be running it laying down and all side panels removed for some time until I can find the right tools to remove the processors, since they are hex keys....not Phillips.....I dont know why, but I guess thats because the manual is for a first generation G5 and this is a second generation G5. And yes, I tried calibrating the cooling system. No difference. =(

Regards.

—Matthew—

null

Feb 2, 2011 7:55 PM in response to Matthew Knice

if I need to take the heat sinks off and apply AS5 paste.

If you go to the trouble to disassemble, don't use AS5- it is electrically conductive (can short the CPU if improperly/excessively applied) and there are much better compounds.

Use Arctic Cooling MX-3.
It helps cool better than most all others, has zero hours curing time (compared to 200 hrs for AS5), is electrically non-conductive and non-capacitive, and has an 8 year service life, as opposed to the 3-5 year life of others.

Feb 2, 2011 8:30 PM in response to japamac

Hello, guys,

First off, I just want to mention that you two, are my favorite two intelligent individuals on this entire forum. Japamac, man, you seem to know more than Apple does about these Machines, and BDAqua, you are very helpful, and you both have recommended awesome suggestions. But aside from the glorification, Thanks again Japamac, I will try the Arctic cooling MX-3. Now, where can I get my hands on such amazing paste? And also, I need to get to my processors, but I cant because I dont have a Hex key thats like what 10 inches? Long...the heat sinks are so deep. I wish it was a phillips. I have a phillips head. But no hex wrench/key thingy majigger. Thanks again guys. =)

Regards.

—Matthew—

Feb 2, 2011 8:53 PM in response to Matthew Knice

I dont have a Hex key thats like what 10 inches? Long...the heat sinks are so deep. I wish it was a phillips

Item #1 on this page:
http://www.xlr8yourmac.com/systems/G5CoolantLeak_Repair/G5_CoolantLeak_Repairp1.html
Heck, KMart, WallMart, Ace Hardware, etc., will have similar.
I will try the Arctic cooling MX-3. Now, where can I get my hands on such amazing paste?

http://www.amazon.com/Arctic-Cooling-Performance-Non-Conductive-Compound/dp/B002 EHIJP0

Normal CPU Temps for Power Mac G5?

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