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12700KF stuck at 400MHZ

BWLServers
By BWLServers
in Troubleshooting
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Posted

Brand new system, MSI Pro Z690-A Mobo. BIOS says 100mhz base clock with a CPU ratio of 4, so I'm locked at 400mhz. I've tried adjusting OC settings, resetting defaults, cleared the CMOS, updated the BIOS, nothing. Temps are in the 20s, so it's not throttling. 

Anyone have any idea what's going on here? Did I just get a bad chip?

  • CPU
    Intel Core i7-7820X @ 4.2GHz
  • Motherboard
    Asus Prime X299 Deluxe
  • RAM
    32GB G.Skill TridentZ RGB DDR4
  • GPU
    GTX 1080Ti FE
  • Case
    Phanteks Enthoo Evolv ATX
  • Storage
    500GB 960 Pro SSD, 240GB PNY SATA SSD, 3TB WD Red NAS
  • PSU
    Corsair RMx Series, RM850x
  • Display(s)
    3x 1080p Garbage
  • Cooling
    Fully Custom EK :D
  • Keyboard
    Razer BlackWidow Chroma "Clicky"
  • Mouse
    Razer Super Mega Black Mamba of Death 9000DPI
  • Sound
    Logitech Something with a broken bass adjustment knob so it's always rupturing spleens
  • Operating System
    NSA-Approved version of Windows 10 Pro

 

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Posted
1 hour ago, BWLServers said:

not throttling

It is throttling, just not thermal throttling. Run ThrottleStop 9.4.3 and open up Limit Reasons to find out the reason  why. With MSI boards it is either power limit throttling, PL1 or PL2, or it might be BD PROCHOT throttling. 

 

Are you running any MSI control software? Post some screenshots of ThrottleStop and I will show you how to solve this throttling problem. 

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  • Author

BD PROCHOT is the only one, mostly red but flickers yellow occasionally. I'm not very familiar with TS, I appreciate the help. Screenshots attached. 

Fresh install of Win11, and it's running at that speed in the BIOS as well so it doesn't seem software related. 

16483309763949175980305703219463.jpg

  • CPU
    Intel Core i7-7820X @ 4.2GHz
  • Motherboard
    Asus Prime X299 Deluxe
  • RAM
    32GB G.Skill TridentZ RGB DDR4
  • GPU
    GTX 1080Ti FE
  • Case
    Phanteks Enthoo Evolv ATX
  • Storage
    500GB 960 Pro SSD, 240GB PNY SATA SSD, 3TB WD Red NAS
  • PSU
    Corsair RMx Series, RM850x
  • Display(s)
    3x 1080p Garbage
  • Cooling
    Fully Custom EK :D
  • Keyboard
    Razer BlackWidow Chroma "Clicky"
  • Mouse
    Razer Super Mega Black Mamba of Death 9000DPI
  • Sound
    Logitech Something with a broken bass adjustment knob so it's always rupturing spleens
  • Operating System
    NSA-Approved version of Windows 10 Pro

 

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Posted

Normally I would say to clear the BD PROCHOT box on the main screen and your computer will instantly start running at full speed.

 

The problem with 12th Gen motherboards is many of them are locking this feature. ThrottleStop shows that the BD PROCHOT setting is grayed out so you cannot disable BD PROCHOT. 

 

If MSI does not fix this with a BIOS update then you will need to replace the motherboard.

 

This has been a common MSI issue for 10 years now. Frustrating that you can no longer use ThrottleStop to fix this issue.

 

Check your board for a LN2 switch. This used to be the source of these problems. If you find this switch, toggle it back and forth 101 times to clean it and make sure it is in the correct position. 

 

A sensor somewhere on your motherboard has failed. This is what is sending false throttling messages to the CPU via the BD PROCHOT signal path.

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