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i7-5820k multiplier gets stuck at 8 after resuming from system standby - Page 2

post #11 of 16
Thread Starter 
Quote:
Originally Posted by unclewebb View Post


The throttling in this situation is not thermal throttling, it is power related throttling. This bit confirms that the PP0 Power Limit is being exceeded.

You are correct. I was using that terminology as the registers indicating the throttle are the THERM_STATUS registers but a more accurate description is that the power limit was exceeded.
Quote:
@sixstringartist - Now that you have fixed your problem, is MSR 0x610 consistent before and after you come out of stand by mode?

Curiously enough, no. The power limit in 0x610 is still half of what it is supposed to be but the lower bits of 0x1B1 are all null so my multiplier is at 12. I tested under load and everything seems to be fine performance wise. It seems the changes to 0x610 are not the direct cause of the issue.
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post #12 of 16
Thread Starter 
Attaching a new log out of resume. The higher order bits of 0x601 seem odd to me.

repatched-resumed.txt 193k .txt file
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post #13 of 16
Quote:
Originally Posted by sixstringartist View Post

Curiously enough, no. The power limit in 0x610 is still half of what it is supposed to be but the lower bits of 0x1B1 are all null so my multiplier is at 12. I tested under load and everything seems to be fine performance wise.

0x610 contains your turbo power limits. A lower limit after stand by mode will result in the CPU throttling when heavily stressed. You will likely see the multiplier throttling when testing with Prime95. Use RealTemp 3.70 and see if the multiplier is stable.

My best guess is that this is a bios issue. On a properly functioning board, these limits should be exactly the same after resuming from stand by.

CPU-Z does not show the important PP0 register. You are going to have to install RW Everything or a similar tool to find out what is in that register.
Edited by unclewebb - 8/18/15 at 11:15am
post #14 of 16
Sorry to bump such an old thread, but I have recently purchased a 5820K and Asus X99-A/USB3.1 motherboard and I am running into very similar problems that you describe here. If I leave the PC to idle then when I return the CPU is locked at the 8x Multiplier (O.4GHz) and doesn't change until I reboot the PC.

What, if any, outcome did you get? Did you contact Asus about the issue? Did your BIOS get a fix?

I thought I was the only person having this issue as there is so little on the internet regarding it, but it's quiet nice to finally find someone else with a similar problem!

Thanks again
post #15 of 16
I've got the exact same mobo & issue, If I put the system into hibernate or sleep & tunr the PC back on my clock speed drops to 0.4, I've got bios update 1901 installed and it's still an issue.....
post #16 of 16
Guys *waaaaaaaaaaaaaaaaaaaaaah*

I have the same issue. Im so sorry for bumping this. please tell me one of you three got a fix?
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