Temps - RTX 3080 and 5950X overclocked

davidmul87

davidmul87

davidmul87

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Hi all,

I recently built my first custom watercooled system which is also overclocked but I feel like my idle CPU temperatures (though idle is 4-5% CPU load due to things like iCue running in the background) are running a bit hot so I wondered if anyone could comment if 1) these are a bit warm and 2) any suggestions on what to do.

System:
- Ryzen 5950X overclocked to 4.6GHz on all cores using 1.285V vcore
- ASUS GeForce 3080 Strix OC with an additional 100Mhz OC applied
- Watercooling with Corsair kit for CPU / Radiators and EK waterblock for the GPU
- Running with 1x 360mm radiator (front-intake) with 3x 120mm fans and 1x 240mm rad with 2x 120mm fans (top mount - exhaust).
- Corsair 4000D Airflow

When the system is at idle the temps look as below in HWINFO:
CPU Section:
- CPU - 50c
- CPU Die - 48c
- CPU CCD1 - 44c
- CPU CCD2 - 36c

Motherboard:
- CPU Package - 50c
- CPU - 40c

The coolant temp at idle is running at around 30c and I have the fans / pump set to kick in fairly hard as the system goes above 30c.

When running Cinebench the system will sit steady at 75-80c on all the CPU measurements in HWINFO and shows 78 CPU Package in motherboard and 67 CPU in motherboard. The GPU in this situation sits down at

When running Cinebench and Furmark at the same time as a stress test - the CPU will get closer to or go slightly above 80c and the GPU hovers around 60c. The pump and fans kick in to high gear in this situation and the temps don't really go higher.

The above is all in a room that has an ambient temp of 20-22c.

Appreciate any feedback on whether this is what i can expect or if i should expect better? I'm fairly comfortable with the loaded temps - more questioning the idle and if there's anything i can do there.




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David
 
I've got a 5950x with Gigabyte Aorus Master 3090 running on a Gigabyte Aorus x570 Master mobo, with a custom watercooling loop comprising an EK D5 pump / res combo and a single 360 rad front mounted in a push/pull config.

Only the 5950x is water cooled. The 3090 is cooled with the factory fitted fan / HS combo.

When I had Ryzen Master set to Auto Overclocking mode, my idle temps were around 60C and load temps kept bouncing off the 90C limit. When I set it to Precision Boost Override mode, my idle (same as you - got iCue running) temps went down to between 35 - 45 and my load temps were around 65C.
 
Change the 240 to an intake and see if that helps. Cpu/gpu in single loop will always be up against is for keeping temp low.
 
I'll see about switching the fans around on the 240 the next time I take it apart although I would then need to show the back side of the fan as otherwise I'd need to re-run all the tubing - something I don't really fancy doing!

It was a tight fit to get custom watercooling into a 4000D but I didn't really want a bigger case at the time (a choice I'm now regretting).

I forgot to mention I also have the mobo VRMs being cooled by the loop so I guess I just need to accept it is what it is and that the 5950X doesn't really do cold idle quite so much... At least I don't need to heat my study anymore even in the winter!
 
How warm do the radiators get? I think you might be asking too much of those 30mm rads.
 
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Under sustained load it stabilised just now (Cinebench + Furmark) with CPU at 87c, GPU at 64c and coolant temp at 40c. By that point the fans are spinning at max, pump is at 4000rpm and the coolant temp is at 40-41c. Ambient temp is about 22c (need to open the windows)...

I did fear I would be at the limit of the radiator capacity of the system but I really can't fit anymore into the case. I guess I might need to revisit what case I use for what PC again. The most I could do is maybe get slightly deeper radiators but not by much honestly given the case design.
 
Try slow down the pump. I get better coolant temperature with the pump at 50% than 100%. Also, less than 50% I start to "lose" performance. If the coolant is flowing too fast, the coolant won't spend enough time in the rads, specially considering it's "only" a 360 and a 240.
 
By that logic, the water would spend more time in the waterblocks too, picking up more heat. But I'm going to try this for myself as I always tend to run my pump at 100% :)
 
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Not yet, I'm pretty happy with my temps so I'm not really worried about tweaking things. might try in a few weeks
 
redkrptonite said:
Hi Olly did you find dropping your pump speed helped with water temp?
Click to expand...
What water temps you seeing now. I have a 5950x and a 3090 in my loop and I’m now seeing water temps about 40c. My cpu idles about 40c and gpu 32c. Under load cpu 63c gpu 60c. Not sure if it bios related for me but my temps seem to have jumped by about 10c recently.
 
I'm not measuring water temps (I have the probe I just forgot to put it in and I'm not loving the through of draining the loop!). I have a 5900x and 3090 in a single loop. GPU never goes above 45c and the CPU 70c, both overclocked. What radiators are you using? I have 2 360mm 60m thick ones
 
Faster flow vs slower flow has been tested and tested. It really makes no measurable difference. "Longer in the rads" simply isn't true. The water spends the exact same time in each part of the system. The reason why temps may vary with speed is to do with turbulence in the blocks. Slower flow can allow laminate flow which reduces the heat transfer from block to water. In effect a layer of water settles over the fins and the incoming water now has less surface area inside the block to achieve heat transfer. But this is only likely with really slow flow.


The linked video by DerBauer showed that. Really slow had a huge impact on how much heat the radiator "removed" but CPU temps were much higher. Modern blocks really need high flow rate.
 
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davidmul87 said:
Under sustained load it stabilised just now (Cinebench + Furmark) with CPU at 87c, GPU at 64c and coolant temp at 40c. By that point the fans are spinning at max, pump is at 4000rpm and the coolant temp is at 40-41c. Ambient temp is about 22c (need to open the windows)...

I did fear I would be at the limit of the radiator capacity of the system but I really can't fit anymore into the case. I guess I might need to revisit what case I use for what PC again. The most I could do is maybe get slightly deeper radiators but not by much honestly given the case design.
Click to expand...
Maybe go for thicker rads.
 
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