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Crossfired and unlocked TFIII 6950s with 120hz monitor Temperature Issues

post #1 of 9
Thread Starter 
Alright so I have unlocked and overclocked TFIIIs in CF that prior to me getting my BenQ 120hz monitor ran an LG IPS 60hz @ 81max GPU1. I get my BenQ and switch it to 120hz with everything else exactly the same and the temp jumps 10C max for the top card (the bottom remains about the same). Is this normal? My systems specs:

i5 2500k with 212+ OC @ 4.6
8gb Corsair Vengeance LP
ASRock Extreme4 Gen3
2x MSI Twin Frozr III PE/OC unlocked @ 1.175/900/1400
HAF 922 with Megaflow 200m side fan and Antec SpotCool pointed into the intake on GPU1

Any idea if going from 60hz to 120hz should put out this much more heat?
    
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post #2 of 9
That's correct. When you have more than 1 monitor plugged to the card, the idle 2D core/memory clocks are higher to maintain stability such as flickering.

Easy test, connect only one monitor will lower the idle temperature.

Edit: and yes from 60 to 120 hz it will be hotter as the GPU will process twice the FPS with Vsync on.
Edited by Ken1649 - 10/14/11 at 1:18am
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post #3 of 9
Well, it's doing up to twice the work it was doing on 60Hz assuming you have Vsync on so it's not surprising really.
If Vsync was off before I'd find it a little surprising as that's a big jump in temperatures if the cards aren't doing a whole lot more work.

Try rigging a fan so it's pushing fresh air in between the cards if you're worried about your temps.
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post #4 of 9
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post
That's correct. When you have more than 1 monitor plugged to the card, the idle 2D core/memory clocks are higher to maintain stability such as flickering.

Easy test, connect only one monitor will lower the idle temperature.

Edit: and yes from 60 to 120 hz it will be hotter as the GPU will process twice the FPS with Vsync on.
I do not have Vsync enabled nor dual monitors connected. Just the BenQ when these temperatures are reported. I have no idle temp issues, as according to Afterburner I am idling at the lowest clocks possible.
    
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post #5 of 9
Thread Starter 
Quote:
Originally Posted by Mike-IRL View Post
Well, it's doing up to twice the work it was doing on 60Hz assuming you have Vsync on so it's not surprising really.
If Vsync was off before I'd find it a little surprising as that's a big jump in temperatures if the cards aren't doing a whole lot more work.

Try rigging a fan so it's pushing fresh air in between the cards if you're worried about your temps.
I already mentioned I do not have Vsync enabled. I also have a Spot cool fan thats aimed right at the air intake on GPU1 as well as a 200mm Megaflow on the side panel that sits right over my vid cards
    
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Crucial m4 64gb // 2x Spinpoint F3 1x 200mm Megaflow side fan, 2x 120mm Scythe Ult... Win7 64 BenQ XL2410T// LG e2370v-bf 
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post #6 of 9
Quote:
Originally Posted by Luminosity View Post
I do not have Vsync enabled nor dual monitors connected. Just the BenQ when these temperatures are reported. I have no idle temp issues, as according to Afterburner I am idling at the lowest clocks possible.
Either way, the GPU has more work with a tru 120 Hz monitor, regardless what FPS monitoring software tells you on a 60 Hz monitor, the actua max FPS is 60.
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post #7 of 9
Quote:
Originally Posted by Luminosity View Post
I already mentioned I do not have Vsync enabled. I also have a Spot cool fan thats aimed right at the air intake on GPU1 as well as a 200mm Megaflow on the side panel that sits right over my vid cards
Actually, I don't think you had mentioned that when I posted my response.

I'll admit I missed the part about the spot cool fan because I read the body of your post and skimmed the specs at the bottom of it.

If you're really worried about your temps, you've got a few options:
1. Make a custom fan profile in afterburner, my TFII GTX470 never saw above 60C even when overclocked so the cooler shouldn't be the problem.

2. If setting the fan to spin faster doesn't help.(60% is a good number if the fans on the TFIII are like the TFII)
Take it apart, remove any dust while doing so and replace the TIM.
Check if this voids the warranty first though, I voided mine anyway so it wasn't an issue.

3. Aftermarket cooling, but on the TF III card the cooler shouldn't be an issue.

One of the first two should fix it, probably option 1.
You just go to settings in afterburner and there should be a tab for fan speeds, set it to start at the highest speed that doesn't bother you and to speed up as the card heats up.
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post #8 of 9
Thread Starter 
Quote:
Originally Posted by Mike-IRL View Post
Actually, I don't think you had mentioned that when I posted my response.

I'll admit I missed the part about the spot cool fan because I read the body of your post and skimmed the specs at the bottom of it.

If you're really worried about your temps, you've got a few options:
1. Make a custom fan profile in afterburner, my TFII GTX470 never saw above 60C even when overclocked so the cooler shouldn't be the problem.

2. If setting the fan to spin faster doesn't help.(60% is a good number if the fans on the TFIII are like the TFII)
Take it apart, remove any dust while doing so and replace the TIM.
Check if this voids the warranty first though, I voided mine anyway so it wasn't an issue.

3. Aftermarket cooling, but on the TF III card the cooler shouldn't be an issue.

One of the first two should fix it, probably option 1.
You just go to settings in afterburner and there should be a tab for fan speeds, set it to start at the highest speed that doesn't bother you and to speed up as the card heats up.
Sorry I replied to a poster before you and I mentioned Vsync was not enabled. I have custom fan profiles in Afterburner that are steeper than 45 degree gradients. I run my fans very high speed. Once it gets to 69C they're already spinning at 100%. The whole system is less than 30 days old
    
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Crucial m4 64gb // 2x Spinpoint F3 1x 200mm Megaflow side fan, 2x 120mm Scythe Ult... Win7 64 BenQ XL2410T// LG e2370v-bf 
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post #9 of 9
Thread Starter 
Ok so I seemed to have gotten results by doing two things:
Switching the GPUs around on the mobo.
I switched the 200mm Megaflow side fan to exhaust air rather than bring ambient air into the case.
I'm not sure which factor improved my temperatures more but the difference is amazing. My Cards are now 37(1) and 42(2) at idle. Under gaming load top card maxed at 67C and the bottom card was 71C. This goes against conventional wisdom that in CF, the top card will always run hotter. Definitely better than the top-heavy temperatures I saw before but also less disparity (at one point I had a 19C difference under load before i switched the GPUs around). I think given how great my cooling and airflow is, to still have the bottom card running @ 42C idle while the top is 37 means that my bottom card just runs hotter than typical TFIIIs. Either way, in this setup I can definitely manage 67/71 max rather than 91/72 max.
Edited by Luminosity - 10/14/11 at 10:27am
    
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Crucial m4 64gb // 2x Spinpoint F3 1x 200mm Megaflow side fan, 2x 120mm Scythe Ult... Win7 64 BenQ XL2410T// LG e2370v-bf 
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