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PC Processors

soupladel
Adept II

high idle temps for 3900x and Noctua D15

As per title, I am idling at about 60-65c in windows at about 8% cpu load, I am using the Noctua d15 with both fans paired with an ASUS Crosshair VIII motherboard.

The only changes I have made in BIOS is to apply a memory frequency of 3600MHz and I also turned on DOCP.

I have also re-seated and reapplied thermal paste (Kryonaut) just in case it was a problem there and it hasn't made a difference.

if I applied high load, the temps don't actually go that high considering, they seem to hover at about 80c, would you consider this to be normal?

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5 Replies

The thermal maximum for that processor is 95*C, so yes that's normal, that's just AMD's Turbo function keeping the speeds as high as possible within the thermal envelope.

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soupladel
Adept II

Yeah, i understand about the load temps, my main concern is about the idle temps being relatively high with a bare minimum of CPU activity.

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When the temperature is lower and the activity is spiky, single threaded activity, that's when the Turbo raises the voltage and clocks to their highest levels.

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the core voltage was showing as 1.45 in BIOS so i dropped this down to 1.25 in stages and low and behold, my "idle" temps are now sitting at mid 30s with 0-1% utilisation, low 40s with light use, the per core voltage does its own thing as and when it likes, but the gaming load temps are now sitting around 50c ish

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use the power saver mode to reduce thermal loads

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