Hot cpu after upgrading to 1080ti

bigjimmyauk · 6 Mar 2018 at 11:56

Never used to have a problem when i had my 980ti but the 1080ti back plate is getting so hot it's causing my cpu to get up 75C before this with the 980ti i would only ever see 65 max.

I've moved the card to the lowest slot possible on the mobo but the rising heat is travelling into the noctua NH-D-14

Rather crude attempt at showing my case fan layout, Hoping someone can give me some better ideas as i don't really want to be watercooling again at the minute, as a side note the cpu fans are hitting 100%once the temp reaches 73 and the cpu throttles at 75, as a short tem solution i've dropped my overclock to 3.8

Glanza · 6 Mar 2018 at 12:04

Have you setup a fan curve on your gpu or left it at stock?

andicole0 · 6 Mar 2018 at 12:10

AIO on the cpu?
Change the airflow from out to in on the cpu. At the moment you're pushing gpu heated air from inside the case over the cpu. Put an exhaust fan at the front of the case going out as well.
Oh yes you're also pulling gpu air over the cpu with the top fans, turn them off or reverse them.
Andi.

Pocah · 6 Mar 2018 at 13:26

I suspect the difference here is the fan profile. I would get MSI Afterburner ( or whatever you prefer ) and write a more aggressive profile. Increase fan speed for the 1080ti which will lower the temperature of the air from it. I would also control the case fans so that they are linked to the GPU ~ so as the GPU ramps up so do the case fans. You may be able to do that from your motherboard or you may need some product like the Commander Pro.
Reversing the air flow is an excellent idea. Change all case inputs to outputs and all outputs to inputs. I would also suspect that if you are having CPU issues your VRM temps are off the planet! Reversing the flow will correct both problems. Could also be the copper backplate on the 1080ti, and you could perhaps mount a small fan on that ( I seem to remember it has one? ). Also I would check your fps in games, and potentially limit the framerate to the refresh rate of your monitor using something like RivaTuner. There is no point in producing heat when you don't even need the extra frames.

doyll · 6 Mar 2018 at 15:47

Maybe a little more aggressive case fan curve? Back of Primo has lots of vent area but I would try removing all PCIe back slot covers for more back of case vent area to hopefully increased front to back airflow around GPU. This often helps lower temps.

Maybe move the top exhaust to middle bottom intake too.