Help with fan control on rads

thoncopers · 26 May 2015 at 20:52

Is it ok to run all fans manually and just have the pump res combo linked to the cpu header so flow can increase with load/temp?
Im about to make my first custom loop in a 900d and all the tutorials seem to gloss over this part of fan/pump control.
Can i run the fans on a slid controller like the nzxt sentry 2 and the link a pump res combo to the cpu header like a EK-D5 Vario X-RES 140 as it is pwm.
any help would be great guys wanna get this right first time

Trunkey · 26 May 2015 at 23:32

I suspect more info around what your pump and other loop parts are will be requested before a solid answer can be given.
For example I have a D5 pump in a Monsoon res, its set at level 2.5 on the dial on the pump body and it never gets changed, other pump res combo's will be different but for me this is fine and its silent, and I do mean utterly silent so never any need to alter it.
I have three fans on my rad running manually off a Molex connector with three more on a fan controller if I want to up the power or slow them down.

MrMD · 26 May 2015 at 23:39

With a D5 Pwm control is not really needed,your best off just getting a Vario D5 and setting it to step 2 or 3.its silent this way anyhows.

For rad fans,I use an a 8 way PWM splitter PCB board.I plug my fans into that and the pcb into the cpu header,This way the fans can spin at minimum speed untill the CPU is put under load and ramp up according to the PWM curve i set in my bios.The pcbs can be had for around £5

thoncopers · 30 May 2015 at 10:56

thanks for the tips
any preference on fans?
i think i have enough space for push pull in the bottom of the 900d

thoncopers · 30 May 2015 at 11:03

sorry il give specs
x99 deluxe,5960x,hyper x predator 3000 ddr4,g1 gaming gtx980,2 intel 730 ssd's in raid 0,corsair axi 1500w psu,corsair 900d and a h80i just to get the systems going

Bickaxe · 30 May 2015 at 11:30

Short answer is yes.
A fan controller can run your fans so you can adjust them manually and let the CPU Header take care of the pump speed.
Having a way to monitor temperatures will help.

What size of Rad do you have?
Fans thought well of are Corsair SPs, EK Vardar, Noctua, Noiseblocker and another one that I've forgotten the name of (available in multipack)

thoncopers · 31 May 2015 at 13:06

was gonna go for that big 480 xspc white and put it in the bowel of the 900d with push pull as there is lots of space there.
i think that one big rad should be well enough for just cooling the cpu with push pull.
was gonna mount the pump on the backside of the drive cages as i have seen a lot of builds looking good like that.

thoncopers · 31 May 2015 at 13:15

if i decide to add another 980 later then get water blocks for them i could add one more big 480 in the ceiling with push pull so there is always a rad in between the components.
i have seen a lot of builds with the loop going from two gpus directly to the cpu??!!!
isn't that a fatal flaw in the heat dissipation