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#1 Dec 14 2011 at 7:48 PM Rating: Decent
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ok not sure if here is the best place for this but here goes. just today ive been having a problem where my i7 950 underclocks itself to 1.6 while in game cause my fps to drop to 20 fps my temps are not high so thats not the problem ive seem to be able to stop it from happening if i disable hyperthreading speedstep and C1E state sorry for a lot of text.

specs are
i7 950 3.2 ghz
6 gb ram
asus sabertooth X58
580 gtx

in short cpu underclocks to 1.6ghz during game turned off hyperthreading speedstep and C1E
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#2 Dec 15 2011 at 12:29 AM Rating: Excellent
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Try just disabling speedstep and see if that does the trick. Also go to your power settings under windows 7 control panel, and ensure that you have the "High performance" plan selected. it will be hidden by default, so click "Show additional plans"

Hyperthreading is your virtual cores, so turning that off loses you essentially 4 CPU cores.

C1E isan error state trigger, it shouldn't be having an effect.

Intel Speedstep is their "let your computer clock itself back when it thinks it is in Idle state" thingy, which is annoying. Kill it with fire.
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#3 Dec 15 2011 at 1:08 AM Rating: Decent
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ah well i have speedstep and hyperthreading turned off c1e state back on and it doesnt appear to happen as much, could it be related to psu problems? the other day my pc just randomly shut down for no reason not even a bsod cpu motherboard ram and gpu are fairly new psu is going on 3 yrs old
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#4 Dec 15 2011 at 1:34 AM Rating: Excellent
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It could be, If your core voltage plug fried itself partially that could be causeing intermittant faults, it could also have damaged the motherboard power capacitors which could be "misfiring" for lack of a better analogy.
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#5 Dec 15 2011 at 8:01 AM Rating: Decent
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i dont think the motherboard capacitors would get damaged as the sabertooth uses military grade parts but i could be wrong
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i7 950 3.2 ghz, 6gb Corsair XMS3 @1600 MHZ, 580 gtx, asus sabertooth X58
#6 Dec 15 2011 at 9:00 AM Rating: Excellent
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They are pretty stable, though the enclosed shroud actually causes heat issues rather than helping. It gets packed with dust and becomes an insulator. Any motherboard on the planet, including one that uses solid state capacitors, can be cooked by a faulty power supply though. SO it is a definite possibility if there are known issues there.

Asus also has an "EPU" energy module for those boards. I usually don't install the driver for it, but if it is installed, it could be doing oddd power things. Or maybe it needs to be installed to prevent odd power things.
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