Alrighty, then . . . . .
Testing results . . . .
Some surprises, . . . . Some disappointments, . . . . Some redemptions . . . .
The first part of the testing was with just the fans and a slave or rpm measuring fan without a rad.
I used a 140 slave for the 140 fans this time for less skewed results than a 120 fan with a 120 to 140 adapter.
I only did the 140 fans by themselves without a rad, as it became clear that getting readings on unloaded fans is practically meaningless, and worse, . . . it leads to errant conclusions.
Here's what I got for the 140 fans without a rad. (did not take pics of the fans only tests)
NZXT LED case fan 780 rpm
Bgears Blaster 1000 rpm
Prolimatech, Aluminum Vortex 1350 rpm
San Ace 38mm thick ($50 on sale) 920 rpm
I did not expect much from the stock NZXT fan, and it delivered as expected.
The Bgears has a pretty good reputation, and I expected significantly more, even for its low price.
The Prolimatech delivered quite well. I've been a proponent of this fan for a long time and have over 20 of them in various builds. Its ~$30 price tag is kind of off-putting for most builders though.
The San Ace performance really ticked me off on the fan only test. . . . This number is miserable compared to the others, even worse than the ~$11 Bgears, and barely better than the free NZXT case fan. I tried both of the San Aces to be sure one wasn't defective or something, . . . . . same result.
But the San Ace fan is the redemption, it's nothing until you put a load on it, then it goes into smokin' mode.
Now for the 140 fans on the GT-X 280 rad:
This is the lower rad, so it's not particularly space constrained and will have fans setup in push pull.
What I want to determine, is what fan combination gets the most airflow thru the rad, and at what dollar cost.
All the tests were done using a push and a pull fan, with the measuring fan between the rad and the pull fan.
First up, the Bgears Blasters: about 600 rpm on the airflow measuring fan
Next up were the Prolimatechs: about 830 rpm on the measuring fan
The Bgears didn't live up to their rep, but the Prolimatechs were solid.
Now this I did not expect, especially after doing the fans only tests, . . . The San Aces that seemed so lame a few moments ago . . . .
Absolutely Freakin' Smoked at 1285 rpm
Now spending $200 for 4 fans for P-P is just a bit beyond what I feel comfortable with, and being they are 38mm thick, that would make a rather bulky rad package.
On the other hand, using the San Aces as push fans, and the Prolimatechs or Bgears on the pull side, could be a great performing compromise.
Here's the results of a San Ace with a Bgears: about 900 rpm measured
And here's a San Ace with a Prolimatech: about 1050 rpm
Talk about a tough decision . . . the San Aces are big bucks, but I've never seen anything move air thru a 140 sized GT-X like that. . . . . Imagine 8 of them on a 560!!!
But I digress . . . .
I also tested the newly arrived 120 fans, Corsair SP120's, and the planned Silverstone FM121's on the Alphacool XT45 360 that just came in.
I really wanted to get an idea of just how potent the Corsairs are against fans I've come to like already.
The build with the Monsta 240 on the bottom, will have the XT45 360 up top, so I wanted to see what kind of airflow results I'd get with single and push - pull fans, as well as to see how the Corsair SP120's do against the Silverstone FM121's, which I've had good results from in past builds.
First up, . . . Push only Corsair SP120: about 480 rpm measured
Next up, . . . Push only FM121: ~ 690 rpm . . . this thing is snowing the Corsair
Let' see if push - pull let's the Corsairs do any better: about 760 rpm . . . a lot better than just push, but not that much better than the push Silverstone.
And the FM121 in P-P: nearly 1200 rpm (1190) these little suckers are rockin'
So much for how the new Corsairs did on the XT45, I was not very impressed with the performance.
They were quieter than the Silverstones, . . . . . But the performance hit was just Wayyyyyy too much to pay for a few db.
While I had the setup, I wanted to get a baseline for the Corsairs on a higher fin density rad, who knows, maybe there was a surprise like the San Aces waiting . . . . .
NOT . . . .
Here's the GT-X with a SP120 in push only: about 410 rpm . . . a good drop from the XT45 speed
Here's the GT-X with a push only FM121: about 625 rpm . . . again a pretty good drop from the XT45 speed
The higher fpi is adding a lot of load.
The higher fin density on the thicker rad is really cutting the airflow flow thru it.
Push Pull really helps out a lot here when there's a lot of restriction to the airflow.
Here's the SP120's in P-P: 720 rpm . . . a very good pickup from push only's 410 rpm
Here's the FM121's in P-P: 1180 rpm . . . . This just surprised the crap out of me! . . . virtually the same as with the XT45 speed
Is it any wonder why a got 12 of these FM121's for the two upper 360 rads!
Hope you guys found these test results as interesting as I did,
Edit to note, that I used the same little airdam setup to isolate the individual test fan and the measuring fan so there was no, or negligible, air leaks.Edited by IT Diva - 5/2/13 at 6:06am