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X99 (Xeon) CPU Throttling/Frequency Problem

post #1 of 3
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Hi guys, hope one of you can help, or point me in the right direction. I've just finished building a rig based on a Gigabyte GA-X99-SOC Force motherboard, coupled to a Xeon E5-1620 v3, and 32GB of Kingston HyperX Predator (2666) RAM. For the sake of "completeness" I'm watercooled using an EK Supreme, 2x EK CoolStream 360 radiators, a XSPC Photon 270/D5 combo and I've also got my 1070 in the loop using a Heatkiller IV full-block.

Now, the problem that I'm having appears to be one of the CPU not running at full speed, or indeed anything even approaching full speed. I'm not sure if it's something to do with Turbo or similar, but the CPU will not run at anything other than 1.2GHz (100x12), and in Windows no amount of loading up the CPU does anything other than keep the vcore at 0.7v and the frequency at 100x12. When the machine boots into the BIOS it also reports 1200MHz as the current speed (though I can see that it's set to 100x35, also tried 100x36 just to see).

Intel XTU shows that the CPU is thermally throttling (which might be a red herring, as I read that some versions of XTU have a bug that can manifest itself like this). The screenshot below shows what's happening in Windows. I've got Prime95 open and running a blend across all 4 cores and all 4 hyperthreading threads. Task manager shows the CPU at 34% load, XTU shows 100% load, and CPUz shows that it's throttled to 100x12. As you can see on both realtemp and XTU, my temps are fine, and certainly nowhere near throttled.



Oh, I've also tried flashing the BIOS to the latest (beta) which I know supports the CPU.

Thanks in advance.
Irn Bru
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel Xeon E5-1620 v3 Gigabyte GA-X99-SOC Force MSI GeForce GTX 1070 AERO 8G OC Kingston HyperX Preadator PC4-21300 
Hard DriveHard DriveCoolingOS
Samsung 960 EVO Polaris M.2 256GB Seagate Firecuda 2.5" 2TB Custom Watercooling "Hardline" Loop Windows 10 Professional 
MonitorKeyboardPowerCase
2x Samsung 24" Corsair K65 RGB XFX 750W NZXT H440 Black/Orange 
MouseMouse PadAudio
Roccat Kone XTD Icemat V2 Large (Black) Asus Xonar DGX 
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Irn Bru
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel Xeon E5-1620 v3 Gigabyte GA-X99-SOC Force MSI GeForce GTX 1070 AERO 8G OC Kingston HyperX Preadator PC4-21300 
Hard DriveHard DriveCoolingOS
Samsung 960 EVO Polaris M.2 256GB Seagate Firecuda 2.5" 2TB Custom Watercooling "Hardline" Loop Windows 10 Professional 
MonitorKeyboardPowerCase
2x Samsung 24" Corsair K65 RGB XFX 750W NZXT H440 Black/Orange 
MouseMouse PadAudio
Roccat Kone XTD Icemat V2 Large (Black) Asus Xonar DGX 
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post #2 of 3
CPU-Z showing max turbo setting is 14x!

Try running throttlestop to check / change settings.
post #3 of 3
Hello Paradigital, I have similar problem like yours. I use Xeon E5-2623 V3 on MSI X99A SLI Krait and it goes randomly stuck multiplier at 12X but sometimes it's normal after reboot, mostly error like yours (stuck at 1.2GHz all cores). Already tried C-state disabled and High power plan in windows still no luck. Is it faulty motherboard or faulty Xeon I still wonder why sadsmiley.gif
Now I try to disable SVID in BIOS.
Edited by neoroy - 9/24/17 at 1:08am
SkynetX
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Xeon E5-2623 V3 @3GHz running 3.3GHz MSI X99A SLI Krait Edition GALAXY GTX980Ti HOF LN2 GOC  Gskill Ripjaws V 4x4G DDR4 2400MHz 
Hard DriveOptical DriveCoolingOS
Seagate Barracuda HDD 1TB SATA3 SAMSUNG Bluray Combo SH-B123L Cooler Master Hyper 212X Turbo Windows 10 Pro 64bit 
MonitorKeyboardPowerCase
DELL U2713HMT Thermaltake Poseidon Z CoolerMaster Silent Pro M2 1000W Silver Acrylic Benchtable 
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Razer Death Adder Blue 3.5G Razer Goliathus Extended [Control] Creative Inspire T3030 
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SkynetX
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Xeon E5-2623 V3 @3GHz running 3.3GHz MSI X99A SLI Krait Edition GALAXY GTX980Ti HOF LN2 GOC  Gskill Ripjaws V 4x4G DDR4 2400MHz 
Hard DriveOptical DriveCoolingOS
Seagate Barracuda HDD 1TB SATA3 SAMSUNG Bluray Combo SH-B123L Cooler Master Hyper 212X Turbo Windows 10 Pro 64bit 
MonitorKeyboardPowerCase
DELL U2713HMT Thermaltake Poseidon Z CoolerMaster Silent Pro M2 1000W Silver Acrylic Benchtable 
MouseMouse PadAudio
Razer Death Adder Blue 3.5G Razer Goliathus Extended [Control] Creative Inspire T3030 
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