IP35 Pro, Q6600. I run at stock speed, but sometimes use the uGuru utility under Windows to adjust the FSB and Vcore to get 3 Ghz. It's 8+ hours Prime95 stable at that speed. But...

I'm seeing weird results when benchmarking with SiSoft Sandra. If I make the FSB and Vcore adjustments in the bios instead of using the Windows based utility, then Sandra sees the processsor as a 3.0 Ghz processor and my processor arithmetic scores are where they should be @ 55,193 ALU and 38,258 FPU. But, if I use uGuru from within Windows and use the exact same settings, Sandra sees the processor as 2.45 Ghz and the scores are 45,059 and 31,243 respectively.

Other benchmarks give me normal scores and ramp up with the processor speed when I use uGuru to overclock. CPUZ also sees the processor at the correct speed when OC'd through uGuru but Sandra doesn't. Does anyone else see this weird behavior with Sandra and using uGuru to OC from within Windows?