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Radiator Question

post #1 of 8
Thread Starter 
Whats better? Im using high performance high static pressure fans

these two
http://www.frozencpu.com/products/14918/ex-rad-336/Alphacool_NexXxoS_XT45_Full_Copper_Triple_120mm_Radiator.html?id=4EWUgGQQ&mv_pc=1876
and
http://www.frozencpu.com/products/14916/ex-rad-334/Alphacool_NexXxoS_XT45_Full_Copper_Single_120mm_Radiator.html?id=4EWUgGQQ&mv_pc=1881

or

these two
http://www.frozencpu.com/products/5326/ex-rad-109/Black_Ice_GTX_Xtreme_360_Radiator_-_Black.html?id=4EWUgGQQ&mv_pc=1889
and
http://www.frozencpu.com/products/5324/ex-rad-107/Black_Ice_GTX_Xtreme_120_Radiator_-_Black.html?id=4EWUgGQQ&mv_pc=1890


thanks in advance.
post #2 of 8


Define "high static pressure"

Is it 2mmh2O, is it 4.5mmH2O, is it 38mmH2O?

The world of "high static pressure" can mean many things tongue.gif

Link the fan.
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post #3 of 8
Probably the Black Ice GTX would be better if you have legitimately high static pressure. It has MUCH higher fins per inch, and is about 10mm thicker, meaning more surface area. Are your fans going to be in push/pull format?
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post #4 of 8
Thread Starter 
Quote:
Originally Posted by ZytheEKS View Post

Probably the Black Ice GTX would be better if you have legitimately high static pressure. It has MUCH higher fins per inch, and is about 10mm thicker, meaning more surface area. Are your fans going to be in push/pull format?

just push

using corsair fans
post #5 of 8
Quote:
Originally Posted by deltief View Post

just push

using corsair fans

Which Corsair fans? There are 4 different models for 120mms

Corsair SP-120 Performance, Corsair SP-120 Quiet, Corsair AF-120 Performance, and Corsair AF-120 Quiet tongue.gif


No matter what I'd go with the Alphacool, as Push only fans at 2mmH20 (which is Corsair SP-120 Performance's max static pressure if I remember correctly) won't be able to handle a 20FPI split fin radiator with good performance.
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post #6 of 8
The Corsair SP120PE have 3.1mmH2O according to mfgr specs.

The difference between the Alphacool NexXxoS and HWLabs BI GTX rads are as follows:
- 11-13fpi vs 20fpi
- 45mm vs 54mm thick
- Very Low vs Moderate High Restriction
- Full Copper Tubes/Fins/Tanks vs Copper Tubes/Fins with Brass Everywhere Else
- Nearly Perfect Scaling from 1krpm upward vs Poor Scaling Below 1500rpm and Ideal Scaling from 2200rpm upward
- 6x G1/4 Ports vs 2x G1/4 Ports
- $70 (360) vs $130 (360)

The GTX are excellent radiators and can dissipate an enormous amount of heat, but they require a great deal of static pressure to perform to the pointtthat they are worth the cost. More static pressure comes from higher speed and thicker fans as well as push-pull configurations, whichmeans mmore noise.
The XT45 are fantastic radiators that make up for the relative low fin density via the all copper construction, and work well even with slower fans which means less noise.

Regardless of the radiator, I would highly recommend Push Pull, as it will result in significantly better temps at the same speed or equivalent temps to push-only but at a much lower speed. The SP120PE are decent fans, but you can get 6x fans that are better in every way aside from aesthetics for the cost of 3x SP120PE's. The fans that I recommend are the Koolance FAN-12025HBK or FAN-12038HBK 2600rpm ones, which are 120x25mm 2600rpm 106CFM 5.4mmH2O fans and 120x38mm 2600rpm 117CFM 6.33mmH2O fans, respectively. They use high quality dual ball bearing motors, and they produce an immense amount of airflow through a radiator, I would guess around 3x what the SP120PE can push based on feeling the airflow of each side by side. They also undervolt extremely well, so a fan controller is a recommended addition (BitFenix Hydra Pro 5ch 30W/ch is my recommendation, it's perfect).

The best part is that they are $8.95 (25mm) and $9.95 (38mm) @ PPC's, and 6 of them would allow you to use the 6.5 percent off discount code.

Plain and simple, there are no better fans you can buy new at that price.

I run 4 in P-P on a UT60 and the water in/water out temp difference is 4C, while with the same exact everything except with 4x SP120PE on the radiator, the difference was 3.09C. That's nearly an entire degree, and considering it's my secondary rad (also have EX420 with 6x Bgears Blasters 140mm P-P), I'd say it's extremely good. I have tried using San Ace 120x38mm 4200rpm fans in P-P and only gained 0.09C over the Koolance fans, so I would say that they are very much in the sweet spot.

If you get the BI GTX, I highly recommend getting the Koolance fans and using push Pull, but with the XT45 you can use any decent fan, but I still highly recommend Push Pull. It's just so much better.
   
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Z77 Bench-a-lot
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post #7 of 8
Thread Starter 
I read from that push pull compared top pull makes almost no difference.
post #8 of 8
Quote:
Originally Posted by deltief View Post

I read from that push pull compared top pull makes almost no difference.

Depends on the thickness of the radiator. With good fans just pulling on a 30mm thick rad it won't really matter, but a 45mm or 60mm rad will definitely benefit from push/pull.
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