I noticed almost immediately after installing the first beta of Windows 7 that it wasn’t reporting the correct speed of my processor. I’m currently running an Intel Core 2 Quad Q6600 (2.4Ghz) overclocked to 3Ghz. Oddly, Windows XP and Vista both reported the clock speed to be 3.00Ghz, but Windows 7 only reported 2.4Ghz. I made sure to verify that the overclock was still active with CPUID which confirmed that yes, the correct clock speed was 3Ghz. Several people suggested just re-running the Windows Experience Assessment, however that didn’t do anything.
I’d mostly forgotten about the issue until I installed Rainmeter, and it started showing the stock clock speed as well. On a hunch, I went in to BIOS and, sure enough, Intel EIST (aka, SpeedStep) was enabled. After I disabled it and rebooted, Windows and Rainmeter immediately started showing the correct clock speed, 3.00Ghz.
Now why didn’t I think of that sooner?
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