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Can 220v affect GPU temp?

post #1 of 14
Thread Starter 
My GTX 260's used to idle at around 54oC but now they are higher - the main one idles at around 71oC and the helper card (SLI) is at around 67oC.
These higher temps don't give much room for increase when I actually start gaming as you can imagine. They quickly climb over 100oC and then game
freezes start to happen.

I lived in the USA when I bought the cards back in '09 and they've worked just fine all along til now. Right now I live in Africa and the voltage here is 220v instead of
the American 110/115v. My Power Supply is capable of both voltages automatically, just plug it in and it senses it and makes the change accordingly.

I'm not currently in a position where I can upgrade my graphics cards, so another solution or at least a work-around would be nice!

-The cards are the EVGA Core 216 GTX 260s
-No overclock on neither CPU nor GPUs
-Windows 7 x64
-Nvidia 314.22 Drivers and HyperSLi .96
-PSU is a ThermalTake TR2 RX 750W, which has been a great PSU by the way

They don't have central AC here, but there is an AC that works pretty good in my room so the actual room temp isn't hot at all (in fact, I on ocassion have to put on a coat, cause it gets that cold from the AC). So the room temp is good, therefore, I don't know what the problem is and suspected that perhaps the 220 Volt thing could be affecting the GPU temps(?).

Before someone suspects a lack of PSU juice - I highly doubt it. 750W is actually more than enough for two GTX 260s. 1000W isn't always necessary ;-|

If you have any idea of why I could be experiencing this overheating please respond
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post #2 of 14
Line voltage isn't going to do a thing to anything after the PSU, its all downvolted from 120~240v to 12v over the internal power cables, and further downvolted to ~1v after CPU and GPU VRMs. Something else might have happened while it was being moved such as a fan not working or the heatsink becoming dislodged somehow.

Another thing is your ambient temperatures will have probably increased. nevermind~

Check fans and heatsinks, nothing else would really be wrong if your ambient temperatures are the same as they were before.
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post #3 of 14
Running 220v can actually in theory be MORE efficient.. i.e. less wasted energy / heat dump..
I highly doubt your psu has ANYTHING to do with your increased gpu temp, as mentioned by the gentleman above me, I would check your heatsinks etc, Also monitor your ambient. It plays a huge roll.
post #4 of 14
Higher line votlage won't affect temps, but dusk and TIM aging can.
 
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post #5 of 14
Thread Starter 
Does Ambient temp = room temp?

Just a moment ago, I was reading some threads about GPU overheating. Some had mentioned dust and one person said he leaves his case open.
I decided to follow his example and removed the side cover off the PC case. Lo and behold, the temps gradually began to drop (as monitored
in EVGA Precision). The temps have now dropped from the around 70oC I stated to 56 and 54oC. That's nice!

But before I removed the side cover off the tower I checked "Enable software automatic fan control" in Precision. I don't know
how much of a role that could've played.

What if I decide it's cold and turn off the AC while gaming or decide to put the side cover back on? More overheating? I'll see if I can check the
heatsinks but tbh, I've never done that before. I think some cleaning should be in order as things can get quite dusty around here. Thanks y'all.
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post #6 of 14
Just leave the side panel off. I have mine off all the time. Ambient is room temp.

Setup a custom fan profile for your cards (I use MSI afterburner because it is easier to use). I think though, that your cards are probably dusty.

http://www.amazon.com/Metro-Vacuum-ED500-500-Watt-Electric/dp/B001J4ZOAW

These things are godly. I own one and it takes all but 5 minutes to dust my machine.
 
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post #7 of 14
Yes, ambient temp is the room temp.
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post #8 of 14
Thread Starter 
The dust around here can be very fine and clinging too, I'll have to see if I can find a substitute blower of sorts to get the dust
out until I can grab one of those Metro Vacuums from Amazon. I never seriously thought dust could affect temps like that until now.
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post #9 of 14
Yeah, they can make things pretty bad, especially if the heat sink gets plugge.
 
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post #10 of 14
Thread Starter 
I was able to pull the cards out and open them up for dust removal, got rid of a nice build up in there. After doing that, they were slightly cooler,
but one thing I noticed is that the thermal paste (TIM?) is almost completely dried up on both GPU's. Could that be the reason for the overheating?

My friend who will be around town today told me he'll ask for thermal paste at a computer store but, thermal paste could be something that's unavailable here.
On the off-chance I can't grab any, I've read somewhere that toothpaste actually works. That true? biggrin.gif
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