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Old August 20th, 2004 Top | #1
 
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Default CPU vs GPU Temps
Why is it that a CPU begins to 'burn' at about 80 degrees C, whereas my FX5600 has a GPU 'threshold' set to 134 degrees C? They are both made of the same stuff right?
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Old August 20th, 2004 Top | #2

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A valid point
Could well depend on the sensor itself I guess.

My CPU runs at half the temperature that my GPU runs at (according to statistics)
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Old August 20th, 2004 Top | #3

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I'll wait for a boffin here, but my hunch is that the actual low level architecture of the chip is different, such that a GPU is more "rugged" and can stand more heat. After all there are similar variations from Intel to AMD CPUs, albeit less marked, where an AMD will be able to run hotter before it starts to fry, I believe (or is it just that they are cranked up and run hotter anyway?)

Anyway, I await an educated opinion to (maybe) bear me out.
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Old August 20th, 2004 Top | #4
 
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Originally Posted by champ2005
Why is it that a CPU begins to 'burn' at about 80 degrees C, whereas my FX5600 has a GPU 'threshold' set to 134 degrees C? They are both made of the same stuff right?
BFG 6800 Ultra OC is factory set to 120C :confused:

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Old August 20th, 2004 Top | #5
 
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And to think I worry about my athlon reaching 50c. I'd love to know what my 9800 gpu is running at.
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Old August 20th, 2004 Top | #6
 
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Perhaps some things are best left a mystery!

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Old August 20th, 2004 Top | #7
 
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Originally Posted by Doom
And to think I worry about my athlon reaching 50c. I'd love to know what my 9800 gpu is running at.
Aberdeen ?

Me too!

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Old August 20th, 2004 Top | #8

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modern day gpu's have as many as or more trannies than a cpu

it would seem they are designed to handle a higher heat threshold than cpu's and have been doing so for a while...

/me shrugs...

am sure there are a coupla engs on these boards who can shed more light..
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Old August 20th, 2004 Top | #9

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I will ask
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Old August 21st, 2004 Top | #10
 
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Running any piece of high density silicon above 90 Deg C is an invitation for an early death. Failure rate is an exponential function of temperature and 90 C is the knee of the curve.

If the junction temperatures truly are running at 120C don't expect the GPU to last too long past the warantee expiration date. But then early failures of Nvidia GPU's is the reason I switched back to ATI products.

On the other hand I really doubt they are running the die that hot. Water boils at 100C. The solder used in electronics starts getting soft at 145C. Nobody in the business could be that stupid... Or could they?
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Old August 21st, 2004 Top | #11
 
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A few reasons I think:

1: The GPU is running less crucial information then a CPU. CPU obviously has more information running at once then a GPU, such as whatever the GPU is needing, as well as OS and other things in the background all at once.

2: Maybe the architecture of the Chip on the GPU is not as well designed as on a processor so it reaches higher temps. Thus making them utilize a different process to build the chips so that they can last longer.

I had another reason, but I can't remember.
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Old August 21st, 2004 Top | #12
 
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Originally Posted by Mubbers
Aberdeen ?

Me too!
LOL. Never noticed. I'm jist aff george street. Yersell?
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Old August 22nd, 2004 Top | #13
 
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well my gpu runs at 62 idle about 70 c when its full on so its not always at 120 c
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Old August 22nd, 2004 Top | #14
 
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Originally Posted by Doom
LOL. Never noticed. I'm jist aff george street. Yersell?
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Old August 22nd, 2004 Top | #15
 
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Well my first question would be what are you using to determin the GPU temp?
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Old August 22nd, 2004 Top | #16
 
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The nVidia drivers - in the temperature monitor section.
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Old August 22nd, 2004 Top | #17
 
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Originally Posted by champ2005
The nVidia drivers - in the temperature monitor section.
Which drivers do you have, as I am running 61.77 and there isn't a temp monitor section.:confused:
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Old August 23rd, 2004 Top | #18
 
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u probably don't have a temperature monitor on your card - only the newer/more expensive FXs etc have them
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Old August 23rd, 2004 Top | #19
 
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i wouldn't necessarily trust that. it's best to have a separate die that you yourself put on the GPU and monitor the temperature with that instead. a lot of onboard monitoring temps can be very inaccurate.

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Old August 23rd, 2004 Top | #20
 
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Originally Posted by champ2005
u probably don't have a temperature monitor on your card - only the newer/more expensive FXs etc have them
ahhh that could be! Mine is only a GeForce4 Ti 4200. Had me worried for a bit there.
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