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Paralell flow in/out on bottom gpu? - Page 2

post #11 of 13
Mine is parallel flow, inlet at the bottom (from the GPU side). There's ~1C difference in temp as in the top is hotter. It's nothing though.
post #12 of 13
Thread Starter 
Quote:
Originally Posted by 47 Knucklehead View Post

Yes.
When you run parallel, you feed your cards almost the same temp water, BUT your flow to each card gets cut in half.
When you run in serial, one card gets cooler water and the other gets the warmer water coming out of the first card, but the flow remains at full speed.
That is why I kept my loop in serial (and had one card running 5-6C warmer than the other) until I added a 2nd D5 pump. Now my temps are within 2C of each other in parallel.

Seems then you have a very restrictive system?

I'm on one D5 pump at Level1 or Level2 and serial gpu's(2gpu system) the temperature is 1c higher on top card.
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CPUMotherboardGraphicsRAM
I7 5820k Stock clocks Gigabyte X99 UD4 2x EVGA GTX 1080 FE SLI  Corsair 64GB (4x16GB) DDR4 2133MHz CL13 Vengean... 
Hard DriveCoolingOSMonitor
Intel 530 M.2 SSD 180GB OS + Samsung 850 EVO st... Mugen 4 push pull Win 7 64bit home prem Acer 27" XG270HU 144hz TN + LG Oled 4k TV 
PowerCaseMouseMouse Pad
EVGA T2 1600W Fractal XL R2 CM Xornet Steelseries Qck+ 45cm black 
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post #13 of 13
Quote:
Originally Posted by grandpatzer View Post

Seems then you have a very restrictive system?
I'm on one D5 pump at Level1 or Level2 and serial gpu's(2gpu system) the temperature is 1c higher on top card.

3 RX360 radiators, an EK Supreme HF block, 2 EVGA GTX 580 Hydro Copper 2 video cards/water blocks, 2 pair of quick disconnects, and 25 feet of Durelene tubing.

I also overclock the bejesus out of my CPU and video cards, so the water gets progressively hotter and hotter through each component, which is why I went parallel and added a 2nd D5 pump with an EK-Dual Top to keep the flow up ... especially since I have 2 10 foot runs of tubing through a wall that separates my computer from the cooling radiator stand/pump/res and fans (so my computer room is totally silent and all the heat is in another area.

wink.gif
Edited by 47 Knucklehead - 10/28/12 at 9:56am
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