For 700MHz – DDR3-1400MHz, I had to loosen the
primary timings to CL7-8-7-25 and increase the voltage to 2.2v (the maximum
allowed on the ASUS P5KC) in order to stabilize the SuperPi 4 Million run:


14 Kingston Hyper X KHX11000D3LLK2 DDR3 Review

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At
CL7-8-7-23 at 2.2v, the highest I could push was 720MHz – DDR3-1440MHz:

 


16 Kingston Hyper X KHX11000D3LLK2 DDR3 Review

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In order
to get into 725MHz terrain, I had to loosen the RAS Precharge from 7 to 8
(CL7-8-8-23):

 


18 Kingston Hyper X KHX11000D3LLK2 DDR3 Review

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In any
case, this only allowed me to push for 5Mhz to 730MHz at 2.2v:

 


20 Kingston Hyper X KHX11000D3LLK2 DDR3 Review

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