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Windows 7: W7 Can't Stop CPU Throttling


06 May 2009   #1

Windows 7 RC 1 7100//Win XPx32 SP3
 
 
W7 Can't Stop CPU Throttling

Not sure which forums to start posting this at so I will start here and move my way around. So here goes: I seem to be unable to stop Windows 7 RC1 7100 from auto Throttling my CPU. CPUID reports that the multiplier is fluctuation anywhere from x21 down to 8x dropping my corespeed from 3519 down to 1300mhz. vCore remains stable at 1.304v.

I know this is purely a Windows 7//Vista problem as when I boot back over to Win XP x32 SP3 I get no fluctuations what so ever. I have tried going into the "Power Management" options in Control Panel and chossing the high performance profile and even making my own custom profile and manually setting the CPU to 100%. Temps are all nominal(~36-39C idle).

EIST, C-State, Overspeed Protection and TurboMode are all disabled in bios. And other 'power managment' in the Advanced BiOS(ACPI is Enabled but i dont think that is a problem) features and all Power Management Features are turned off.

Mobo is a MSI x58 Platinum SLI

I've did some googling and came across somethign that mentioned this registry directory:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager]

Two entries caught my eye: ProcessorContrl and ProtectionMode

I was tempted to tinker with some settings but I figure I'd come here before i shoot myself in the foot. Any help would be appreciated as this auto throttling is quite annoying.

Edit: C1E is also disabled in the BIOS.


My System SpecsSystem Spec
.

06 May 2009   #2

 

Seems like you've covered all your bases - not sure where else to go with this as I am still on a 780i mobo - I have the Core i7 965 EE CPU, just have to save up for he Classified, some 2000 MHz RAM (to the tune of 12 GB) and I'll be rockin'....

Detailed System specs (look under your user name, near the bottom of any of your posts, to the left) will help us out a bit in troubleshooting for ya....

FWIW - the only times I saw CPU throttling active on my Q6600 was when I enabled C1E and / or The Thermal protection was enabled, but ISTR that power management not being set to *both* S1 and S3 played some havoc with my system as well....
My System SpecsSystem Spec
06 May 2009   #3

Windows 7 RC 1 7100//Win XPx32 SP3
 
 

Sure I'll post the system specs here in a sec. If you need the dxdiag leme know.
http://www.overclock.net/intel-cpus/...ml#post5942596

• Processor model: Intel Core i7 920
• CPU clock speed: 3.52GHz
• Hyperthreading: On
• CPU Bclk speed: 168Hz
• CPU multiplier setting: 21x
• CPU core model: Bloomfield
• CPU batch/stepping: 3838A, C0
• CPU voltage: 1.288V
• Motherboard model: X58 MSI Platinum SLI
• Cooling: COOLER MASTER Hyper N 520 RR-920-N520-GP 92mm Sleeve CPU Cooler
• RAM size/model: 6GB OCZ Gold DDR3-1600(OCZ3G1600LV6GK)
• RAM speed: DDR3-1336
• SuperPI result (1M): 11.750s

C1E, EIST, C-State, SpreadSPec, Overspeed Protection: Disabled
DRAM timings 8-9-9-19 1.5v ~1333mhz
CPU: +.06v
QPI: +.13v
CPU PLL: Auto
Mem Ratio to Uncore: 4:8


Edit here it is:
CPU
i7 920 @ 3.5ghz
Motherboard
MSI X58 Platinum SLI
BIOS: v3.4
Memory
OCZ Gold PC1600(OCZ3G1600LV6GK)

Graphics Card

eVGA 260 GTX SSC

Sound Card

X-Fi Extreme Music

Power Supply
Antec TP-650 650W Continuous power ATX12V V2.3

Case
Lian Li

CPU cooling
COOLER MASTER Hyper N 520 RR-920-N520-GP 92mm
OS
Windows XP SP3 32bit//Windows 7 RC1
My System SpecsSystem Spec
.


06 May 2009   #4

 

Hmmm - I wonder....

Although the BIOS is reporting that you have C1E disabled, enable it and boot back into 7 and see if it still fluctuates - if it does hen reboot, disable, and boot back into 7 again.

Try to notice if there are differences in the frequency and / or amplitude of the fluctuations changes depending upon the setting - that will help determine if it is an independent setting or (perhaps) a native / non-native driver issue....
My System SpecsSystem Spec
06 May 2009   #5

Windows 7 RC 1 7100//Win XPx32 SP3
 
 

Yea I was thinking the same thing, might be a BIOS issue. I have a thread goign over at the OCN forums as well. I foudn a post there, which I linked in the thread there as reference, where a member had a similar issue which was resolved by a BIOS upgrade. Unfortunantly for me this BIOS update is the altest and just came out a few weeks ago so I may be SOL for a bit.

Here is the link over there, I'll resume this tomorrow morning... Gotta get up early and resume the job hunt tomorrow and it's getting late here. Thanks for your input and I'd appreciate it if you could follow up.

W7 Can't Stop CPU Throttling - Overclock.net - Overclocking.net
My System SpecsSystem Spec
06 May 2009   #6

 

OK, your last couple of posts there got me thinking....

First off, yeah, once you install Windows with ACPI enabled or disabled, you cannot simply change the setting and expect it to work without some heavy duty registry editing.

But, I know you said you've rebooted 8 times - try mu suggestion, and ***make sure you shutdown, wait 30 seconds, and let it cold boot****

I have an issue with older (pre15.23) nForce drivers and the current Windows 7 native drivers for my mobo - it goofs up my VT on resuming from sleep - and it keeps it b0rked if I perform a warm boot (reboot). But if I shutdown and restart (cold reboot) it starts to work without changing a single setting in the BIOS - hell, without even entering the BIOS.

I finally figured out that it was the away-mode driver for the nVidia chipset and NICs that was the root of the problem - and apparently the native Windows 7 drivers don't have that one little tiny driver installed....
My System SpecsSystem Spec
06 May 2009   #7

Windows 7 RC 1 7100//Win XPx32 SP3
 
 

Well the thing is I've had those settings disabled for a good 2 months(like 2+ weeks with the new bios verson). Have had plenty of cold boots with those BIOS settings in place, however, I don't think i've had a cold boot since i changed the power management options in Windows 7. Though I have booted to XP and back since then to run some tests.
My System SpecsSystem Spec
06 May 2009   #8

 

nah, since it works in XP and not in Windows 7 (I conveniently forgot this, sorry, I can be an idiot sometimes) obviously your BIOS is working.

It *has* to be a driver issue - what third party drivers did you install? Also, running any apps like SpeedFan or apps to make your system 'greener' or reduce the carbon footprint?
My System SpecsSystem Spec
07 May 2009   #9

Windows 7 RC 1 7100//Win XPx32 SP3
 
 

Quote   Quote: Originally Posted by johngalt View Post
nah, since it works in XP and not in Windows 7 (I conveniently forgot this, sorry, I can be an idiot sometimes) obviously your BIOS is working.

It *has* to be a driver issue - what third party drivers did you install? Also, running any apps like SpeedFan or apps to make your system 'greener' or reduce the carbon footprint?
None.. The only drivers I installed after I installed Windows 7 RC1 were the latest Nvidia and SoundBlaster Drivers. Also I ran prime95 and the multiplier ramped up to x21 and fluctuated between 21 and 20x. No more droppign down to as low as x6(~800mhz). Though, in XP I'm fairly confident that it did not waiver at all as I have the mult set to x21 in the BIOS with overspeed prot//turbo mode disabled.
My System SpecsSystem Spec
07 May 2009   #10

 

Of course it is ramping up - the *demand* is there on the CPU b/c of the Prime95. Kill Prime and give it up to 5 min and it will start dropping again.

That is why I wanted you to disable it and see if there was a change in the fluctuations....and then re-enable it again.

Also, when you flashed your BIOS, did you reset to defaults, then reboot and re-set all your options?
My System SpecsSystem Spec
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 W7 Can't Stop CPU Throttling




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