One D5 pump enough?

StonedPenguin · 26 May 2020 at 00:08

Hi,

I built my rig about 2.5 years ago now, It seems to be gradually getting warmer and warmer
I recently drained the fluid and flushed with distilled water, clean the rads etc etc then filled up with Mayhems X1.
It didn't seem to change much, temps still gradually rising. This PC consists of 3x 1080ti's cryptomining 99% of the time and a bit of gaming, The GPU's tend to sit around 45-50c under full load 24/7, This used to be 35-40c.

I'm without a flow meter but my loop with a single D5 goes:

Res>Pump>GPU>GPU>GPU>240rad>420rad>CPU>480rad>480rad>

Is it worth adding another D5?

Radox-0 · 26 May 2020 at 01:41

I have a somewhat similar rig, 3 1080Ti's, CPU and multiple rads, but also loads of 90 degrees. For me a pair of D5's in serial: https://www.overclockers.co.uk/ek-w...al-d5-pwm-serial-incl.-2x-pump-wc-945-ek.html like that work together to provide double the head pressure and I do see a significant increase in flow rate vs one (I do have flow rate meters in the loop).

Temps do as a result drop nicely when flow rate increased with D5's in serial. But for myself at least in my situation, with 1 D5 the flow seems largely insufficient around 80-90 L/h which is cause of my temp issues I expect.

With that said, could possibly check your blocks for any gunk and stuff if at all possible aswell I would have thought. Possibly plastic leaching going on if its

Bugbait · 26 May 2020 at 09:55

With 3 GPUs, 3 large radiators plus a medium sized one in your loop I would agree that a second D5 certainly wouldn't hurt. I use the same EK serial D5 configuration as linked above.

tyler_jrb · 27 May 2020 at 15:29

A 2nd would be better but possibly not required, especially if it was running that fine before. Chances are as others have said likely needs a good clean out both internally and externally (radiators for dust etc). And new coolant. Possibly run a blitz kit through the system and or strip down and clean out the blocks.

A 2nd pump is always better in terms of longevity incase one fails as things tend to get very hot very quick when there isn’t any flow.