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Old February 19, 2011, 09:38 AM
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Default GTX 460 Sli Overclock

I've just started to overclock my gtx 460's and just want to know if there are any ways to achieve better results. I've been testing my OC with Heaven and my final results are:

Heaven Benchmark v2.1

FPS: 66.8
Scores:1683
Min FPS: 24.7
Max FPS: 124.8
Hardware

Binary: Windows 32bit Visual C++ 1500 Release May 21 2010
Operating system: Windows 7 (build 7600) 64bit
CPU model: Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
CPU flags: 2668MHz MMX SSE SSE2 SSE3 SSSE3 SSE41 SSE42 HTT
GPU model: NVIDIA GeForce GTX 460 8.17.12.6063 768Mb

Settings

Render: direct3d11
Mode: 1680x1050 4xAA fullscreen
Shaders: high
Textures: high
Filter: trilinear
Anisotropy: 16x
Occlusion: enabled
Refraction: enabled
Volumetric: enabled
Replication: disabled
Tessellation:disabled

On both cards my overclocks are:

Voltage: Stock
Core Clock: 845 Mhz
Shader Clock: 1690 Mhz
Memory Clock: 2250 Mhz

I can't push the core clock up any higher or else heaven crashes. If I up the voltage would it be possible to take up my core clock a bit more?
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Old February 19, 2011, 10:37 AM
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Quote:
Originally Posted by gambel626 View Post
I've just started to overclock my gtx 460's and just want to know if there are any ways to achieve better results. I've been testing my OC with Heaven and my final results are:

Heaven Benchmark v2.1

FPS: 66.8
Scores:1683
Min FPS: 24.7
Max FPS: 124.8
Hardware

Binary: Windows 32bit Visual C++ 1500 Release May 21 2010
Operating system: Windows 7 (build 7600) 64bit
CPU model: Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
CPU flags: 2668MHz MMX SSE SSE2 SSE3 SSSE3 SSE41 SSE42 HTT
GPU model: NVIDIA GeForce GTX 460 8.17.12.6063 768Mb

Settings

Render: direct3d11
Mode: 1680x1050 4xAA fullscreen
Shaders: high
Textures: high
Filter: trilinear
Anisotropy: 16x
Occlusion: enabled
Refraction: enabled
Volumetric: enabled
Replication: disabled
Tessellation:disabled

On both cards my overclocks are:

Voltage: Stock
Core Clock: 845 Mhz
Shader Clock: 1690 Mhz
Memory Clock: 2250 Mhz

I can't push the core clock up any higher or else heaven crashes. If I up the voltage would it be possible to take up my core clock a bit more?
GTX 460's are very strong overclockers you might be able to bump it with some voltage but from what i hear that is a very nice overclock.
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Old February 19, 2011, 10:45 AM
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absolutely. give it an increase.
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Old February 19, 2011, 11:11 AM
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How much should I push my voltage up to? right now it's at 962mV.
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Old February 19, 2011, 11:16 AM
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well look at your temps/furmark stability. start slowly. some cores fare better,others not. so the exact answer is i dont know for your
particular samples. just take it easy, like oc'ing a cpu. you dont push a truckload of juice right away :)
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Old February 19, 2011, 12:16 PM
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My guess is that your memory o/c is holding back your core shader, as well as voltages. Still, nothing past 850 is guaranteed on a 460, at that point it just depends on the manufacturing process and perfection.

For voltages, just find as many posts online about people who over-volt their 460 and make your decision based on a variety of sample data. But be more careful about over-volting GPUs than CPUs!

Also, the SLI profile for the Unigine heaven benchmark tool isn't that great. My GTX 570 is getting better results than my SLI GTX 460 1GB got, especially for minimum fps.
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