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GTX460 Load Temp problem

Last response: in Overclocking
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December 24, 2011 5:19:03 AM

Hi All,

I recently just bought AC Twin Turbo Pro GPU cooling for my Zotac GTX460 1GB. Its winter but I want less noise when playing games. At first it doesnt fit since DVI is double stack hence I need to cut few fins to fit. It is very quiet and idle temp is very low (low 20s). When playing games (MW3) my temp is about mid 30s and when overclocked to to 815/1630/2000 it will be low 40s. I was intially very happy.

But when testing with OCCT or furmark, the temp is way higher than noisier blower. Max temp shows 85 load with default clock and keeps on increasing to 97+ before i stop it when overclock. I confirm the fan is working and i have re-installed 3 times (including re-apply TIM) to make sure the everything is fine.

I havent even start to play with Default voltage yet. With original blower I used to set to 850/1700/2000@ 1.065V.

my question:

1. I realized that GTX460 core surface is around 2/3 or 3/4 physically bigger than AC contact base, could this be the problem?

2. Other than the cooler, I dont have any VRM heatsink installed. I realized the original cooling include VRM heatsink. Considering the VRM heatsink size, could the impact be that high?

3. There is instruction to bend AC mount bracket if its not flat in AC offcial site in case it performs bad but I have checked mine and seems okay.

4. Other factor, screw too tight? TIM too much/less?

my PC Spec:
i5 750 @3.8 with CM Hyper 212
G.skill Ripjaw DD3 1600 4GB
P7P55D
Zotac GTX460 1GB with AC Twin Turbo Pro
Kingston SV100S2 64GB + 160GB WD blue HD
HanssG 28" HG281 1920 X 1200 res
no name gaming case with 2 intake in front, 2 exhaust at top and 1 exhaust at rear all 12" fans, backpanel wire management, top mount PSU etc.



Thank you for your help!
December 24, 2011 6:13:47 AM

well, yes, the contact between the cooler and the gpu must be on the entire surface of the gpu.
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December 30, 2011 5:00:18 AM

Anyone? Please help me.

I just recently re-tested and I cant get overclock like before on stock fan. I used to overclock 850/1700/2000@ 1.065V but now as soon as i set the clock and hit apply on Afterburner the PC just hang or restart. This cant be caused by the heat, can it?

Can all of these caused by lack of VRM heatsink?
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!