Question CPU clock drops under load ?

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PcForDummies127

PcForDummies127

Mar 10, 2022
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GPU is not ramping up under load and CPU drops it’s clock under load. I tried EVERY method I even bought a new NVMe SSD and installed a whole new OS on it and still the same issue.

CPU: i7-8700k
GPU: Asus GTX 1070ti
MB: MSI Z370 A-Pro
CPU Cooler: Corsair H60
Ram: 16GB DDR4
 
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PcForDummies127

PcForDummies127

Mar 10, 2022
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tennis2 said:
Assuming this is the CPU?
You hit thermal throttling at around 90C (on CPU or GPU), so if it's idling at 85C, that's your problem.
Click to expand...
I had fans going, even externally. Took the whole side cover off and still no changes. The GPU and boards cools just the CPU stays warm but once I go to game, clock starts to dip them frame shutters every once in while
 
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tennis2

tennis2

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Nov 12, 2018
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Terminology:
  • Idle Clock - typically under 2GHz. Little/no system load. (Why run your car at 5000rpm while parked?)
  • Turbo clock - Usually* a limited time burst of frequency to boost performance.
    • Turbo frequency should have a limited duration, but mobo manufactuers can set it to infinity (and they usually do by default)
    • Turbo frequency is a function of # cores loaded. For the 8700K:
      • 4.7GHz for 1 core load
      • 4.6GHz for 2 core load
      • 4.5GHz for 3 core load
      • 4.4GHz for 4 & 5 core load
      • 4.3GHz for all core load
  • Base clock - Usually* the long-term frequency under load. 3.7GHz for the 8700K. Again, because of the mobo manufacturers' tendency to set turbo duration to infinity, it's rare to see base clock on aftermarket desktops unless you're thermal throttled or have manually reverted the duration to Intel's "stock" values.
  • Thermal throttling - when a CPU/GPU reduces its operating frequency because of excessive temps to prevent damage. Depending on the severity of thermal throttling, this could be dramatically less than even the base clock. The chip will attempt to regulate/maximize frequency whilst staying as close to that ~90C limit as possible.
 
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PcForDummies127

PcForDummies127

Mar 10, 2022
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tennis2 said:
Terminology:
  • Idle Clock - typically under 2GHz. Little/no system load. (Why run your car at 5000rpm while parked?)
  • Turbo clock - Usually* a limited time burst of frequency to boost performance.
    • Turbo frequency should have a limited duration, but mobo manufactuers can set it to infinity (and they usually do by default)
    • Turbo frequency is a function of # cores loaded. For the 8700K:
      • 4.7GHz for 1 core load
      • 4.6GHz for 2 core load
      • 4.5GHz for 3 core load
      • 4.4GHz for 4 & 5 core load
      • 4.3GHz for all core load
  • Base clock - Usually* the long-term frequency under load. 3.7GHz for the 8700K. Again, because of the mobo manufacturers' tendency to set turbo duration to infinity, it's rare to see base clock on aftermarket desktops unless you're thermal throttled or have manually reverted the duration to Intel's "stock" values.
  • Thermal throttling - when a CPU/GPU reduces its operating frequency because of excessive temps to prevent damage. Depending on the severity of thermal throttling, this could be dramatically less than even the base clock.
Click to expand...
I think it’s the stock value thing. Lol I have a tendency to think I’m making things faster. Any fixes? I really don’t think it’s the CPU OR GPU thermal. I attacked the thermal options in OCCT. nothing strange
 
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Karadjgne

Karadjgne

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PcForDummies420 said:
The clock idles at 1.20ghz, usually 80-85 degrees. Thank you guess for reply going to upload photos of problem ASAP
Click to expand...
Neither cpu nor gpu should idle at anything close to that temp range. Idle Should be @ 10-15°C above room ambient, as in somewhere around the 30's - 40's.

If removing the side panel did nothing, my guess would be either the paste or pads are failing and that'll leave very little room for any load wattage before thermal throttle.
 
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PcForDummies127

PcForDummies127

Mar 10, 2022
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My
Karadjgne said:
Neither cpu nor gpu should idle at anything close to that temp range. Idle Should be @ 10-15°C above room ambient, as in somewhere around the 30's - 40's.

If removing the side panel did nothing, my guess would be either the paste or pads are failing and that'll leave very little room for any load wattage before thermal throttle.
Click to expand...
GPU is idling right now at 52deg 18% tdp
 
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PcForDummies127

PcForDummies127

Mar 10, 2022
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0
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Karadjgne said:
Neither cpu nor gpu should idle at anything close to that temp range. Idle Should be @ 10-15°C above room ambient, as in somewhere around the 30's - 40's.

If removing the side panel did nothing, my guess would be either the paste or pads are failing and that'll leave very little room for any load wattage before thermal throttle.
Click to expand...
Would you suggest changing the cooler? IBuyPower Built Pc.
 
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PcForDummies127

PcForDummies127

Mar 10, 2022
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FINALLY SOLVED: The 120mm AIO was not keeping the 8700k under control, but this noctua NH-D15 can do it with EASE. Current idle temp is 34degress, under FULL LOAD never passes 58-59. 1440p ultra settings
 
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