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Intel Speedstep stopped working

Vertigo

Vertigo

Vertigo

Soldato
Joined
28 Dec 2003
Posts
16,665
Ok this is weird.

Have my i7 2600K overclocked but only by changing the turbo multipliers so, when loaded, it runs at 4Ghz regardless of how many cores are in use. When not loaded, Speedstep should kick in and clock it down to 1.6Ghz (or whatever it is).

This was working fine but I've now noticed that the CPU is stuck at 4Ghz all the time, even when I'm not running anything and my processor usage shows at 0% in task manager.

Anyone know why it's not clocking down?
 
Interesting, didn't realise that option was there.

That said, I've always had it on high performance and Speedstep was working fine before so that can't be it. I tried reducing the minimum processor setting to some low values and finally 0% but it's made no difference.

Oddly, I now notice that the CPU seems to be dropping back to 3.7Ghz when idle. What on earth?!
 
Yeah using CPU-Z. Seems to be flicking between 37 and 40 multipliers.

Haven't changed anything in the BIOS to my knowledge. Not sure whether the power management setting actually affected anything or not - could have done but it should be clocking down much further than 3.7Ghz.
 
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