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EVGA Classified SR-2 - The higher the BCLK, the lower the GPU-performance

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riddler0815
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2017/08/13 03:52:29 (permalink)
Hi,
 
I recently bought an EVGA Classified SR-2 with two X5650 and overlclocked them (stable) to 20x197MHz respectively 22x197MHz (including speedstep). CPU performance is great, but GPU is about 30% lower than it should be (used 3DMark Time Spy demo for measuring). It's confusing because during my overclocking attempts and testing the GPU-performance was like expected (that was around 190MHz BCLK). Around 194/195MHz BCLK the GPU-performances started to decline.
 
My question is:
Is there any divider (BCLK to PCIe frequency) that jumps in, when the BCLK is too high? And if so, how can I adjust this divider (in the BIOS)?
 
Here is my frequency configuration:

 
tia
¿RIDDLER?

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    nikkocortez
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    Re: EVGA Classified SR-2 - The higher the BCLK, the lower the GPU-performance 2017/08/13 11:19:14 (permalink)
    It may have to due with some of the settings for the chipset.  It's been a log time since I have had my SR-2 but I do remember USB and other things would be affected by higher over clocks usually due to lower voltages.  I just can't remember exactly where I found and fixed a lot of those issues.
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    riddler0815
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    Re: EVGA Classified SR-2 - The higher the BCLK, the lower the GPU-performance 2017/08/16 13:00:12 (permalink)
    You mean there could be some voltage configurations that are too low for a 197MHz BCLK?
     
     

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