GPU seems to be benefitting most in single loop.

momo56

momo56

momo56

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So i have two d5's a swiftech double rad and a tfc triple rad in this loop:
res>pump1>pump2>cpu>mosfet 1>mosfet 2>NB SB block>gpu>double rad > triple rad.

My i7 920 @ 4ghz now hits load at around 68 degrees but when I had a triple loop it would max at around 56-57 (HT OFF)

My 4870 x2 however seems to benefit the most as in this new single loop theres only a max temp increase of 6 degrees compared to 14-18 degrees in the triple loop.

The nb /sb temps seem to have also increased by 3-4 degrees.

I dont think restriction is a major issue in the single loop as I tried adding a 3rd d5 and also a 10W ddc (so four pumps) but this had no effect on temps so I got rid of them (due to noise and space).

Just find it a bit weird that the GPU is the only thing that benefits from a single loop. I prefer single loops since I have a window and it looks much neater. Is there any way I can improve the temps of the CPU? (without the obvious adding another rad or increasing fan speed).
 
Probably because your GPU is adding the most heat to your loop, and will therefore benefit the most.
 
For most people a single loop will provide better temperatures, it's only in quite extreme situations/loop configurations that they lose to a multi loop.
 
split into 2 loops. also you need your rads after your pump.

pump/rad/block/res

you have way to much on a single loop. you would be better off with 2 mcp355 on a single loop
 
loop order is invariably unimportant aside from having the res before the pump (so it doens't run dry).

loop temperature evens out so having the rad ANYWHERE in the loop will yield the same results.

he doesn't have too much in a loop, all it means is there will be a slightly higher heat dump into the loop, thus everything will be a few degrees higher than using 2 loops (or more).

i've got 2 loops in my rig, and it's a royal pain in the arse, in fact i doubt i'm getting much of a gain compared to if i was using just a single loop. the only reason i have 2 is i have 2 different pumps, and would rather not risk screwing up the loop by getting the speeds mismatched.
 
Having rads after the pump will make no difference.

Without knowing your previous loop set up it's difficult to speculate as to why you are getting higher temps.

If your previous set up was with the CPU loop having a 120.3 rad then the rad would have had to have dissipated around ~80W of heat per fan (an oc'd i7 will put out somewhere around 220-250W).

Now since you have a 4870X2 (which puts out about 300W of heat) you have about ~520W being dissipated across 5 120mm fans, so each 120mm fan now has to dissipate ~100W, increasing the temperature delta between the water and ambient air temperatures, which will of course in turn increase CPU temps.
 
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