Simple questions rads vs flow

Richard Donaldson · 31 May 2020 at 00:46

Question:

In a stable system, of say idle temps of 20 over room temp. Which would yield a better decrease in temp : A bigger radiator with an extra fan, or a better pump with a increase flow rate.

i.e. if F(Flowrate) +R(Radsize) = D(delta over room)

would D be greater in :
(F+1) + R = D
or
F + (R+1) = D?

D1craig · 31 May 2020 at 02:43

I'd have to go for rad size over pump efficiency unless going from extremely poor pump. The usual pumps - DDC and D5 would have negligible difference. Everything I have read suggests the water loop temp equalises after so much time.

Th3D0n · 31 May 2020 at 11:15

rad size then pump speeds best way to go about it is 120mm size per item getting cooled and 240 per overclocked item also the fans have a huge impact

Richard Donaldson · 31 May 2020 at 23:49

Thanks Guys - will try fans pushing instead of pulling first but then might be time for new rad!

pastymuncher · 1 Jun 2020 at 11:39

Hi and welcome to the forums.

Depending on what radiator it is some can run much better with fans in push and pull mode. I used to have a Coolgate CG360 which was pretty poor with fans running slowly but add 3 more fans so they ran in psuh/pull and the radiator came alive and was much improved below 1000rpm.

Richard Donaldson · 1 Jun 2020 at 14:19

I'll give push push it a go - I've got a couple of extra fans (perhaps not the screws though....) Not sure there is enough clearance at the top of my case (h500p cool master) though.

pastymuncher · 1 Jun 2020 at 20:14

Make sure it's push/pull not push/push although looking at pictures I don't think you have the headroom to do it.

How long have you had the case? Apparently the original version was flawed as it had a very restrictive front panel which they have now fixed with a updated version. I only discovered that by reading Kitguru's review on the white version.

Richard Donaldson · 1 Jun 2020 at 21:20

lol good point. Push Push wouldnt be the best ... I've had it about two years but its the white one with the mesh front so not the original. Its a two fan rad, and I think I might be able to get push pull on one side, possibly both if I can find a 90 degree rgb cable..

Here is a pic :

https://1drv.ms/u/s!AnFEVhdCn8ThjPxdEkIuoYdp7o5pgw

HTML:

<image src='https://1drv.ms/u/s!AnFEVhdCn8ThjPxdEkIuoYdp7o5pgw' />

George Hudson · 2 Jun 2020 at 11:10

Hard to tell from that image, but do you have a kink in the inlet hose to your pump? Also, how about moving your radiator from the top of the case to the front and having the fans in a pull configuration drawing in cooler ambient air through the radiator?

pastymuncher · 2 Jun 2020 at 13:15

It does look like you have a massive kink there which will hurt the flowrates big time. A 90 degree fitting would be a better fix there. That rear fan would be better as a exhaust to get rid of the hot air from the gpu.

George Hudson · 2 Jun 2020 at 15:41

As pastymuncher mentioned that top rear fan should be an exhaust because at present it is pulling in the hot air expelled from the GPU. Your case is very similar to my H500M so I believe you do have room to fit your fans below the radiator in exhaust orientation as that is how I have mine fitted.

pastymuncher · 2 Jun 2020 at 19:01

His gpu will be mostly dumping it's heat into the case which is why I said to set the rear fan to exhaust so that it get's that heat out of the case. That sort of cooler on a gpu dumps very little of it's heat outside the case.