CPU and GTL ref configuration

Renegade227

Junior Member
Nov 19, 2008
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I have a regular Asus P5Q motherboard and am trying to get prime95 (large FFT) stable on my 4Ghz overclock (Q9650)...The last missing puzzle piece is tuning my CPU and NB GTL ref voltages...but my BIOS only has 1 option for CPU GTL ref voltage (0.62x, 0.63x, 0.65x).

I have noticed that users who are getting prime95 stable 4+GHz overclocks are using very specific GTL values for their CPU and NB...options that my P5Q does not have. Is there ANY way for me to gain access to these options whether by third party software or anything? I tried Ket's mBios 1611 and it didn't have the additional GTL options.

Any help would be fantastic. Thank you!