Whats the limit of a D5 pump?

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So, I basically want to know if anyone thinks I'm pushing I too far by adding another rad into my loop or if its going to be too much for my pump to handle.

ATM loop consists of:

D5 pump
bay res
1 x 360 radiator
2 x 240 radiator
2 x gpu blocks
1 x cpu block

I have a 140 rad sitting here that I could put into the loop but I don't know how much more the pump can push.

I know I'm not going to get any magic temperature drops by adding in the other rad but I'd like to be able to maybe lower my fan speeds slightly & keep the same temps. That's the idea anyway...
 
What temps are you currently seeing on the cpu/gpus? I doubt adding a 140 would make much difference, maybe a couple of degrees at most but after a while of having the system on playing games or w/e it'll probably reach the same peaks you get now (although it may take longer to reach that peak).

Try running your fans lower and see what you get too, I run 2x670s OC'd and an i7 3770k @ 4.4Ghz on a single 360 and 240 rad, GPU's don't budge beyond ~45C and the CPU above ~48C and that's with all fans running around 700RPM (virtually silent). (I do however have 2 D5 pumps in dual bay res, but that's for redundancy not flow, I run them on setting 1).
 
I think u really need another D5 even for your current set up...

Oh.

I'm running a [email protected] & 2 Titans with a modest OC with it for 24/7.
When benching I set the CPU to 4.9 & try my luck with the GPUs. The GPUs never really go over 44-45C with fans on full & when stress testing the CPU it tops off about 68-69C.

Is there any way of estimating flowrate?
 
dpoing 2 seprate loops will be best, 1 for gfx and one for cpu tbh

i noticed a differance on mine when i switch to 2 loops
 
Adding another pump might only improve temps by 1-2 degC to be honest, adding the 140mm rad probably won't get you a measureable decrease in temperatures given how much radiator area you've already got.
 
Everyone seriously under estimates what pumps can cope with, this setup will be fine.

Hmm you really shouldn't see a large difference between the two, one big loop is better since you can easily add redundancy and split the load amongst multiple rads.
 
Im running a single d5 with 1 420 a 280 2 gpus and a cpu without any problem I run mine at full however its not really required anything above 3 and I still get turbulence in the res

GPU's don't budge beyond ~45C and the CPU above ~48C and that's with all fans running around 700RPM (virtually silent). (I do however have 2 D5 pumps in dual bay res, but that's for redundancy not flow, I run them on setting 1).

I assume they are idle temps. I dont know any 3770k that runs 48c load even at stock and delided
 
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I am using a single d5 on speed 1 and it copes just fine. My i7 3820 is overclocked to 4.4 and idles at 25 - 33C and 41 - 48C under load. Also in the loop are asus dcii gtx 670sli, 1 360 rad and 1 240 rad.
 
my d5 pushes through a similar loop (cpu block, 2 x gpu block, 2 x 240mm radiators, bay res, aquaero 5 waterblock) with no problem at all. The only reason to add a second pump would be for redundancy
 
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