D5 Pump RPM

FL630 · 5 Nov 2016 at 21:10

A quick one, what RPM are you all running on your D5's? Does it make much of a difference?

BluD · 5 Nov 2016 at 21:45

It depends on your loop, when i ran a separate loop with just the CPU and a 240 rad in, the speed made no difference at all so i just left it on setting 1.

When i ran a large loop that goes 480>res/pump>240>240>360>gpu1&gpu2>cpu> the gpus dump a bit of heat on the CPU and it tended to get a little hotter, if i turned up the pump speed slightly it went back to normal temps.

I run mine on setting 3/5 now, not sure what RPM that is cause i dont have the speed sensor hooked up.

dnic77 · 5 Nov 2016 at 21:52

I run mine at speed 1. I run 2 480mm rads and it goes through the cpu, gpu, res. Ive tried all speeds and there was no difference for me other than pump noise.

BluD · 5 Nov 2016 at 22:00

Yeah i suspect the fewer components in the loop, the less difference it will make, since it already makes very little difference i wouldnt worry about it.

FL630 · 5 Nov 2016 at 23:03

Okay so I've got a 240 and 280 slim, CPU and GPU, plus pump/res combo. I just run it at 50% PWM which equates to 1700rpm. Temps seem fine but I'd like the noise to be lower. Perhaps I'll play around.

I assume fan RPM matters more than pump for temp reduction?

BluD · 6 Nov 2016 at 00:41

Yeah way more. As long as the waters actually moving then its taking the heat to the rads and your good, the faster its moving the more equal the water temp will be around your loop.

FL630 · 6 Nov 2016 at 16:12

I see. That makes sense. At 50% PWM (1700rpm) the GPU/CPU almost always run the same temp of around 52 degrees in games, so that would suggest that this water flow is doing the job at keeping things equal.

I'm looking for as quiet as I can get and as of yet It's not quiet enough, perhaps I'll turn the pump down.