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[Solved] Can I pair an AF optimised fan with an SP on a rad?

post #1 of 4
Thread Starter 
I'm planning on getting 2x Kraken x41s for my GPUs. For the radiators, I'd want to go with one of these configs:

AF optimised fan in pull

or

AF optimised fan in pull paired with an SP fan in push?


How would those configs compare to just using an SP fan in push by itself?


The air flow fan I want to use are the Corsair AF140s and the fans they'd be paired with would be Phanteks PH-F140SP
post #2 of 4
You will be fine to mix those fans since they are of comparable rpm ranges (1150rpm / 1200rpm)

You will definitely see some improvement in performance with push pull than you would with just one set of fans and you might even be better off with mixing the fans than you would if they were all the same type. For example, here's Martin (of MartinsLiquidLab):
Quote:
Originally Posted by Martinm210 View Post

Absolutely, I encourage mixing of fans and have done it many times. The mixing fan phobia generate by forum members is really just another forum myth by users not knowing. I have yet to see any testing to show it being a problem. Actually I have found mixing two different fans to be a benefit at times. When testing the H220 I found two AP15s plus two Helix to be a great match. The helix alone seemed to have a little harmonic under pressure in push only that goes away and smooths out when the GTs were added. Also anytime you mix like fan speeds you can get rpm harmonics so having fans at speeds that are a few hundred off is a good thing.

Noctua even does mixing of fans and speeds on their NH-D14.

While it may not make sense to mix 5000rpm Deltas with 1200rpm yates, I sure wouldn't worry about 500rpm differences particularly when resistance like a radiator is keeping air flows well below either fans max air flow rate. Mixing fans is a good thing..smile.gif
post #3 of 4
Thread Starter 
That's perfect, thanks for that thumb.gif +rep
post #4 of 4
Any fan will work, the question I assume you want answered is 'would that be more effective' ... I would say not. Comparatively anyway.

Pushing or pulling air through an obstruction like a radiator is not a lot different in terms of where the airflow level will fall on a PQ graph. As such two Static pressure fans will produce higher airflow than two very airflow optimised fans. Much like pumps, the flow rate is a result of the combined pressure and flow of both fans. An airflow fan design in pull will produce less negative pressure on the reverse of the radiator. Less combined pressure = less flow.

In the case of these particular fans the effect may be slight, but it def won't be an advantage.

Any fan in pull at all will of course be an advantage over push only. Just likely not better than two SP design fans.
Kusanagi
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Kusanagi
(21 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 3570K Asus Sabertooth Z77 EVGA GTX 780 SC Corsair Vengeance Pro CMY16GX3M2A2133C11 16GB 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 256GB X2 EK Supremacy Aqua Computer Aquaero 6 Pro Aqua Computer D5 USB 
CoolingCoolingCoolingCooling
Aquacomputer MPS 400 flow meter EK-CoolStream PE 360 EK-Coolstream PE 240 Noiseblocker Eloop B12-PS 
CoolingCoolingCoolingCooling
EK Vardar F2 EK-FC Titan Acetal & Nickel EK-RAM Monarch X4 Clean CSQ - Acetal+Nickel EK-D5 X-RES 140 CSQ 
OSMonitorMonitorPower
Win 8.1 Pro 64 bit Samsung S27A750d LG E2290V-SN Silverstone Strider Plus 850W ST85F-P 
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Corsair Obsidian 750D 
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