Here's the Ultra-Mega-Superfreakiness; I'm all stock except for CPU, which is at 8x400 for 3.2GHz. Stable as a rock, straight 5.9's in WEI, 12+ hours in P95 "Torture Test", nice cool temps (45-50C max during test, 30-35C idle), haven't needed to touch any voltage whatsoever, as RAM is at default (400) speed since I'm using a 2.0 div in MIT.
The system POSTs at 8x400=3.2GHz without issue. When booting into Vista Ultimate x64 the "Welcome Center" details displays the correct processor, but reports that it is running at 3.6GHz, and not 3.2GHz. CoreTemp (latest) also reports 3.6GHz, as does PC Pit Stop's benchmark series. Weird, but...OK, I can live with it.
Now, along comes CPU-Z (latest). CPU-Z reports, while the other applications are running (all displaying 3.6GHz), the correct processor, but says it is running at the stock 2.4GHz, but every 30 seconds or so it will jump to 3.2GHz and then fall back to 2.4GHz after a couple of seconds.
Rebooting and verifying at POST as well as in BIOS shows 8x400=3.2GHz.
What in the world is going on?!?! POST/BIOS says one thing (3.2), Vista, Speedfan, CoreTemp, and PCPS say another (3.6), and CPU-Z says yet another (2.4).
How can this possibly be?
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Disable C1E, TM2 & EIST in BIOS. EIST may be hidden. When they're enabled, the cpu will throttle down when idle.