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What causes more damage?

post #1 of 9
Thread Starter 
What over time, would cause more a GPU to have a shorter life?

Higher temps at load?

or

Higher voltage at load?

The reason I've asked is because I've recently moved my GPU down from an x16 to a x4 PCI-E slot to increase the gap between the GPU's as the top card was always about 15 degrees (c) hotter than the bottom under load.

However moving the card too the x4 slot stopped my long time overclock from working unless I increased the voltage up from it's normal 1.050v too 1.072v too make it stable again.

What's the maximum safe voltage for GTX 460 cards? If the voltage is too high and may cause problems then I'll move the cards back together, lower the voltage and put up with the increased heat.
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post #2 of 9
I would say votage, although these concepts are not mutually exclusive. Too much voltage can fry a card instantly and the thermal limit of current GPUs is very high. That said, high voltage = high temps so I don't think you can separate either unless you're doing water cooling or something like that.
post #3 of 9
Interesting. Usually those two things aren't separable.

In general, voltage shortens the card's life faster. However, such a small boost in voltage pales in comparison to 5C or greater.
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post #4 of 9
In my experience, hot GPUs die, cool ones last. And I've bought GPUs since the Voodoo 1.

Every card I've had since the FX 5700 I've used manual fan control or aftermarket cooling for that reason. The hot ones die, believe that.
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post #5 of 9
Same with HDD's or any other component in the PC.
That's why I never had to replace any HDDs.
Though my 8800GTX started giving artifacts at stock speed and 66c which is low for that chip.
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post #6 of 9
Volts kill things faster than heat, but heat still kills them.
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post #7 of 9
Thread Starter 
Thanks for the quick replies

Yeah I get that more voltage = more heat, I find that all the time in overclocking but when the cards were together during heavy load the top card would hit about 85 degrees (c) and the bottom card would just about hit 70 degrees even with a custom fan profile.

Now that there is a big gap between the cards, both cards hit about 72 degrees due to the increased voltage needed to keep my usual overclock stable.

I want to overclock these cards as much as possible but want them too last me about another 2 years.

so is 85 degrees too high?
is 1.072 too much for constant gaming on the 460?
and is 72 degrees okay for a max temp?
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post #8 of 9
In the end, everything is voltage.

Heat just accelerates damage done by voltage.

The relationship is not linear so you cannot just say which is worse without quantifying values.


http://en.wikipedia.org/wiki/Electro...hermal_effects
Edited by DuckieHo - 5/11/11 at 8:23am
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post #9 of 9
It's all relative to the card and many aspects about it, there is no proper answer.
 
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