RTX 3090 Watercooled Temp

[Michael_T]

That part makes sense to me. But why is the GPU so hot? The GPU should be getting fed with cool water right? Howcome one person can get 38c with a 480mm rad and I get 61c with 3 x 360mm rad?

Component temperatures are a function of power usage, water temperature and flow rate. With enough flow rate the water shouldn't heat up much after going through the gpu block or vrm block, but the CPU temperature suggests it is. Assuming the GPU and CPU blocks are making good contact, my guess is the flow rate is not high enough.

 

[vapor matt]

Ok looking at the flow res to GPU, then to chipset, then to CPU then to vertical rad, then to bottom rad, then to top rad and back to res?

restricted airflow on bottom rad as its not far from floor, with dust filter and distance you wont get much air through that rad, and what does come through will be warm, i take it its pushing air through rad not pulling? the vertical rad fans are they pushing cool air from outside or pulling?
the top rad is obviously pushing air from case out.

Ideal it would be GPU to rad, then cpu to rad, then chipset to rad back to res. try raising your case off the floor to aid air flow through bottom rad, even an inch or 2 will make a difference.

while i was waiting for a water block for the GPU i connected both 480 rads in line for CPU to see if temps come down, answer was no.

Ideal for you would be to run 2 loops, 2 res and 2 pumps and separate gpu loop from chipset and CPU, run 2 rads on CPU/ chipset and 1 on GPU but airflow is key and should always come from outside of the case.

 

[Michael_T]

If it's not too difficult to do, as a quick test, could you remove one Rad from the loop but leave everything else the same? And are the temps the same with the case open?

Also, as matt mentions, having three rads in a row isn't ideal, if only because you will get the most cooling from the first rad, so your third rad will be doing very little to cool. To increase cooling power with multiple rads, they should really be connected in parallel.

 

[Grim5]

Thanks guys, I got some good tips, there is a few things that can be tried - firstly will be increasing pump rpm and fan rpm to see what difference that makes, if that fails can look at changing fan configuration and possibly removing some dust filters. Later on I may also order a custom front panel from ppcs and attach 3 fans to the front panel

 

[KrazeyKami]

Double post, don't know how to delete it ^^

 

[KrazeyKami]

Asus ROG Strix 3090 (non-oc variant) + AlphaCool Eiswolf 2 (modified backplate with my own active cooling, see https://forum.alphacool.com/threads/alphacool-eiswolf-2-for-3090-strix-wrong-size-of-padding.2809/ for details on my mod) / https://hardforum.com/threads/asus-...tercooled-temperatures-3dmark-scores.2017452/ for my rig.

GPU is overclocked: +175 Mhz GPU / +250 Mhz Memory / 137% TDP

Idle temperatures:
CPU Tdie: 44.5c
CPU Die avg: 35.7c
Asus Chipset: 58.5c
GPU: 25c
Hot Spot: 32c
Memory Junction (VRAM): 32c
VRM: 29c

Stresstest: 30 minutes Unigine SuperPosition @ High Textures / 3840x1600

Stress / Load (Non-OC) Peak Temperatures:
CPU Tdie: <not measured>
CPU Die avg: <not measured>
Asus Chipset: <not measured>
GPU: 56.1c
Hot Spot: 66.2c
Memory Junction (VRAM): 66c
VRM: 48c

Stress / Load (OC) Peak Temperatures:
CPU Tdie: 70.8c
CPU Die avg: 66.6c
Asus Chipset: 64.8c
GPU: 65.6c
Hot Spot: 76.3c
Memory Junction (VRAM): 72c
VRM: 53c

3DMark scores (OC):

TimeSpy: Overall: 19538 GFX: 21431 CPU: 13023 - https://www.3dmark.com/spy/26080542
TimeSpy Extreme: Overall: 10647 GFX: 11060 CPU: 8789 - https://www.3dmark.com/spy/26078840
Port Royal: GFX: 14949 - https://www.3dmark.com/pr/1430299