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Help needed re:CPU and MB temperature

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Name: JAY
Date: August 11, 2002 at 16:25:38 Pacific
Comment:

In my system with AMD XP 1800+ and Soltek 75DRV5 MB, the CPU and system temperature runs around 52C(centigrade) idle and 61C under load(running Sandra CPU burn-in wizard under normal stress). Is the temperature too high? I do get the warning of 'too high temp for the motherboard' from Sandra, which I found gives the warning for any temperature above 50C. I am a bit worried about the warning.

Also, I am currently using a CompUSA 250W power supply and the current voltage runs at 1.76~1.77 for VCORE(1.75 setting), 4.91~4.95 for +5(5V norm), 3.31 for VCC3(3.30V norm) and 12.2 for +12(12V norm). Are these voltages fine? I initially bought a 'supposedly' 400W PS which gave way more ripple and replaced it with the 250W PS which I already had. With the 400W PS, the voltage for +5 was just 4.75V and for +12, it recorded as high as 12.8V. And the picture on my KDS LCD was very unstable, with lots of ripples. Thanks for your help.



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Response Number 1
Name: jam
Date: August 11, 2002 at 18:16:47 Pacific
Reply:

From AMD:

The operating temperature of a system or processor is highly dependent on the characteristics of the system as a whole and the combination of components that make up the system. Consequently, the "normal" operating temperature will vary from system to system, depending on each system's make-up. Some of the variables that affect the operating temperature of a system are: case size, air flow characteristics, installed components, processor speed, processor heatsink/fan solution, thermal interface material, power supply, voltage settings, workload, and ambient air temperature.

Although "normal" operating temperatures are not specified for AMD processors, there are maximum operating temperature ratings that must not be exceeded. The maximum operating temperature of a processor may be determined by the processor's Ordering Part Number (OPN). Refer to the processor's data sheet for additional information (data sheets may be downloaded from the Technical Documents page). Typically, the maximum operating temperatures for Socket A AMD Athlon™ and AMD Duron™ desktop processors are 90 degrees Celsius for processors operating up to 1GHz, and 95 degrees Celsius for processors operating above 1GHz.

Note: The maximum operating temperature specification is based on a measurement taken directly from the top center of the processor die. The temperature reported by a system's BIOS may not reflect the true temperature of the processor if the measurement is taken from an alternative location. Additionally, the reported temperature will be affected by the accuracy of the thermal probe, hardware monitor, and analog to digital signal conversion. As a result, some variance should be allowed when comparing the maximum operating temperature to the temperature reported by the system's BIOS.


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Response Number 2
Name: martin
Date: August 12, 2002 at 01:07:35 Pacific
Reply:

hi the temps you state are way to high. I did not read hte above long note but basically ensure you have one large heatsink and fan on CPU go to www.overclokers.com or the uk version www.theoverclockingstore.co.uk

example my xp1800 runs at 40 to 45 understrain but I have and this is important. Good dual fan PSU, a large intake fan at bottom front of the case with a blow hole. extractor fan just above the CPU fan as have it set to suck air off the heatsink and not blow and then extractor fans on the back of the case this removes air and replenishes with cooler air quicker.

have a look at migh system pics to give you an idea

http://homepage.ntlworld.com/magicsystems/pics/D.jpg

http://homepage.ntlworld.com/magicsystems/pics/E.jpg

any questions send me an email

martin@magic77.fsworld.co.uk


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Response Number 3
Name: AlmightySR
Date: August 12, 2002 at 09:53:20 Pacific
Reply:

anthing over 10c for me is high :-) got liquid cooled, get a radiator, get a freezer condenser :-)


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