I have an Asus K8N mobo with an AMD Athlon 64 3200+. At the std setting in the BIOS (Award ver 1004) the CPU runs at 2.21 GHz. After running for a month or so, I decided to overclock the CPU. I set it to 1%. This gave a reading of 2.2 GHz in Windows (XP w/SP2), 2.2GHz in Cool & Quiet, 2.224 GHz under CPUID, 2.222 GHz in PC Diag Pro, and 2.22 GHz in SiSoft Sandra 2005.3.10.50.
One week later, I added a fan to the side of the case across from the CPU and overclocked to 3%. This time, under Windows, it showed 2.27 GHz, PCDiag 2.266 GHz, SiSoft 2.27 GHz, CPUID 2.268 GHz. Now is where it gets wierd.
5 Days later, I set it to 5% and Windows showed speed at 2.31 GHz. PcDiag this time read the CPU at 1049 MHz.
I then waited 2 more weeks and set the overclock to 10%. This time Windows showed 2.42 GHz, PCDIAg 1100 MHz, PCMark 04 100 MHz. CPU temp was 38 and board temp was 37.
The following day, I set it back to 3% and Win showed 2.27 GHz, PcDiag 1029 MHz, CPUID 1031 MHz, Cool & Quiet 1000 MHz. After another 3 weeks, I set it back to 10% and WQin showed 2.42 GHz, PcDiag 1100 MHZ, PCMark 04 at 100 MHz.
After 2 days this time, they system hung up trying to open IE. I then set it back to 5% and Win showed 2.31 Ghz, PCDiag 1049 MHz, PCMark 1024 MHz, Cool & Quiet 1000 MHz, SiSoft 1050 MHz, and CPUID at 1054 MHz.
I've changed settings around 3 more times and even set to Std again. The same thing occurs. Windows shows CPU speed at twicw what the other various programs show.
Can anyone explain why this is happening?