Well, so far so good on 4.2Ghz (133 x 31 for 4138). Past 30m of Linpack, still got 30m to go. So what does CPU PLL control? Also, just an FYI, adding the EK NB block to the stock heatsink lowered my NB/SB temps by about 12c. I will still probably go with the Koolance FB block, but for now that will have to do.

Assuming it passes Linpack, should I raise the multi or start raising the BCLK? Any benefit to raising the BCLK?

Thanks.