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4790K drops clock frequency under heavy load - Page 2

post #11 of 29
Are you noticing loss in gaming performance when the CPU speed drops? Not all scenes will require 100% processor usage, and it is not uncommon to have some or all cores on idle after everything is loaded into the GPU.
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post #12 of 29
It takes about 100ms for the processor to turbo on Haswell/Broadwell vs Skylake's 10ms or less 1ms I think.
post #13 of 29
Thread Starter 
Quote:
Originally Posted by LeadbyFaith21 View Post

Your CPU hits 75 C within 1 minute of gaming?

Yea, but doesnt go any further. stays within mid to high 70s
post #14 of 29
Thread Starter 
Y
Quote:
Originally Posted by inedenimadam View Post

Are you noticing loss in gaming performance when the CPU speed drops? Not all scenes will require 100% processor usage, and it is not uncommon to have some or all cores on idle after everything is loaded into the GPU.

Yes, I can feel stuttering...
post #15 of 29
Quote:
Originally Posted by Symbfrk2 View Post

Yea, but doesnt go any further. stays within mid to high 70s

The drops in clock speed is almost certainly thermal throttling then, your CPU shouldn't spike to the 70s within a minute of gaming. I would take off your CPU heat sink, and replace the thermal compound there to see if that helps at all, if not, I would get an aftermarket cooler for it.
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post #16 of 29
Quote:
Originally Posted by Symbfrk2 View Post

And intel's stock HSF.

That alone is more than enough.

AMD stock coolers may suck (the ones before Wraith), but Intel ones are plain junk. You will need to replace the thermal paste and preferably the cooler. A TT Fryo Silent is a cheap 165W TDP cooler with a 120mm fan, it will keep your your CPU really cool - like 50*C under load, 60*C under torture.
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post #17 of 29
Yea, unless your case has really good cooling and airflow over the hsf area the intel stock cooler can barely keep up with a 4790k without a turbo. As others have said it shouldn't jump that quick in temps. Reapply paste and also try to open the case and put a box fan blowing over the components to see if the issue still persists.

Also, make sure you don't have a setting in your bios where it thermal throttles at a lower temperature than default.
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post #18 of 29
Thread Starter 
Okay ill try replacing the cooler. Also what is north bridge frequency? That dropped to 30 MHz today, according to AIDA64 Extreme. while cores didn't drop and stayed at 4.0 GHz. What does that mean?
post #19 of 29
Quote:
your CPU shouldn't spike to the 70s within a minute of gaming.

If you apply a CPU load then the CPU will heat up to almost maximum temperature in a matter of seconds, certainly less than minutes and that is completely normal. Peak temps in the 70's and even 80's to low 90's will not cause thermal throttling.
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post #20 of 29
Quote:
Originally Posted by Cyro999 View Post

Quote:
your CPU shouldn't spike to the 70s within a minute of gaming.

If you apply a CPU load then the CPU will heat up to almost maximum temperature in a matter of seconds, certainly less than minutes and that is completely normal. Peak temps in the 70's and even 80's to low 90's will not cause thermal throttling.

^ This. There may be some residual temperature creep that happens as the case heats up over prolonged usage, but hitting 70C within seconds is perfectly normal, and well in safe range.

I swear it sounds like VRMs overheating, but that board has a decent VRM layout, the chip is not heavily overclocked, and with the panel off and decent case flow... I fail to see how its possible.

Do you experience the same throttling when you leave everything stock? I get wanting to downclock a bit to keep the temps low, but wouldnt it be easier to just set a lower turbo multiplier and keep speed step?

Edit to add: your question about the north bridge: The north bridge connects the Cores to the RAM and PCIE, it used to be its own chip on the motherboard, but its functions have been integrated into the CPU die for several generations now. We still have a southbridge that handles USB, PCI, BIOS, and some other not so bandwidth heavy functions. My guess is that it is not actually dropping that low, and its just an error in reporting.
Edited by inedenimadam - 8/10/16 at 9:06am
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