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Rasa x360

post #1 of 8
Thread Starter 
I got my RASA watercooling kit and have it all ready and installed, although I remember reading somewhere that a large radiator like this X360 will perform much better under low RPM fans.

As of now I just quickly hooked up all three of the fans that came with the RASA to the power supply so they are running at 100%. Is this the wrong way to cool my radiator?

If so what is the ideal RPM for my fans to be running at to cool the radiator? Would it be possible to get a good RPM using a 5v or 7v connection or would I need an actual fan controller?

Thanks in advance guys!
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post #2 of 8
Quote:
Originally Posted by Necrodox View Post
I got my RASA watercooling kit and have it all ready and installed, although I remember reading somewhere that a large radiator like this X360 will perform much better under low RPM fans.

As of now I just quickly hooked up all three of the fans that came with the RASA to the power supply so they are running at 100%. Is this the wrong way to cool my radiator?

If so what is the ideal RPM for my fans to be running at to cool the radiator? Would it be possible to get a good RPM using a 5v or 7v connection or would I need an actual fan controller?

Thanks in advance guys!
If the noise isn't bothering you then it's fine. There is no right answer, you'll only find out by experimenting yourself. There are a lot of other factors to consider, like ambient temps and even more importantly, case airflow and pressure.
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post #3 of 8
It's not so much that lower RPM fans will work better on an RX rad than high RPM fans, but rather that low RPM fans will be more effective on the low FPI RX series than on other traditional thin, higher FPI, rads due to less air restriction. Fans should also be quieter in general on the RX radiators due to the low FPI.

If you want to run high RPM fans on the RX and get lower temps which is fine; it's just kind of defeating the purpose of the radiator, which is to cool very well and do it quietly. If you're planning on running 2krpm + fans no matter what, you should just get something like the GTX rads as they perform better at those speeds than an RX.

Take a look at Martin's chart here which shows Radiator performances at different fan speeds. As you can seem, the RX has some of the best temps for low RPM setups, but once you start getting faster fans, it loses its edge and the GTX comes out on top.

Edited by whiteslashasian - 5/9/11 at 7:48am
    
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post #4 of 8
Interested to know what cooler you had before and what temps it was getting, and what temps you are seeing now.
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post #5 of 8
Thread Starter 
Quote:
Originally Posted by whiteslashasian View Post
It's not so much that lower RPM fans will work better on an RX rad than high RPM fans, but rather that low RPM fans will be more effective on the low FPI RX series than on other traditional thin, higher FPI, rads due to less air restriction. Fans should also be quieter in general on the RX radiators due to the low FPI.

If you want to run high RPM fans on the RX and get lower temps which is fine; it's just kind of defeating the purpose of the radiator, which is to cool very well and do it quietly. If you're planning on running 2krpm + fans no matter what, you should just get something like the GTX rads as they perform better at those speeds than an RX.

Take a look at Martin's chart here which shows Radiator performances at different fan speeds. As you can seem, the RX has some of the best temps for low RPM setups, but once you start getting faster fans, it loses its edge and the GTX comes out on top.
Thanks for the chart, so from what I'm understanding certain radiators perform better under different conditions.

The RX is designed for a lower RPM fan while the GTX is designed for a higher RPM fan. So to really get the benefit out of my RX360 I would need to set these fans at 800-1000 RPM correct?

Pretty stupid question but what does FPI stand for?



Quote:
Originally Posted by Zate View Post
Interested to know what cooler you had before and what temps it was getting, and what temps you are seeing now.
I had a Coolermaster Hyper N520 which gave me a solid 24-35 degree day to day operating temperature but this was at the stock clock.

I wanted to overclock the thing to a solid 4.0 or more but I can't even boot with a manual overclock because of my RAM.

XMS3 9-9-9-24 rated at 1.8v and I have a EVGA P55 FTW motherboard with an i7 860. The RAM has compatibility issues with the board from what it seems, probably because it's rated at 1.8v and the FTW motherboard should only handle a max voltage of 1.65v (from what I understand).

I ran Intel Burn Test with a 3.3ghz overclock (dummy overclock worked with the RAM) and I got temps around 77C.

I didn't break 80C, max was 77C.

As a result I had ordered some 16GB of G-Skill RAM (I'm a video editor so yes I will be using all that RAM lol). I should be getting it sometime this week so as soon as I get it I'll go for a 4.0 overclock and run the test and post the temperatures!



IN ADDITION: I was wondering if you guys could recommend a fan controller, one that is reliable (I like the LED screen with stats) but overall I need it to work. So if anyone has any ideas please feel free to post any suggestions you may have. Thank you.
Edited by Necrodox - 5/9/11 at 11:06am
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post #6 of 8
Quote:
Originally Posted by Necrodox View Post
Thanks for the chart, so from what I'm understanding certain radiators perform better under different conditions.

The RX is designed for a lower RPM fan while the GTX is designed for a higher RPM fan. So to really get the benefit out of my RX360 I would need to set these fans at 800-1000 RPM correct?

Pretty stupid question but what does FPI stand for?
While the RX is optimized for low RPM fans, it's not as if it stops cooling any better at higher RPMs, it's just that it scales a little worse compared to the GTX as you go up in RPM. RX works better than the GTX at low RPM and the GTX works better than the RX at high RPM.

If you already have 2000rpm fans, there's no reason to ditch them unless you want a quieter system, then you could just get a fan controller and undervolt them.

FPI is fins per inch. How densely packed the cooling fins on the radiator are placed.

RX:


GTX:
    
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by whiteslashasian View Post
While the RX is optimized for low RPM fans, it's not as if it stops cooling any better at higher RPMs, it's just that it scales a little worse compared to the GTX as you go up in RPM. RX worksbeN better than the GTX at low RPM and the GTX works better than the RX at high RPM.

If you already have 2000rpm fans, there's no reason to ditch them unless you want a quieter system, then you could just get a fan controller and undervolt them.

FPI is fins per inch. How densely packed the cooling fins on the radiator are placed.

RX:

GTX:
Gottcha, I really appreciate the detailed response. As far as dan controllers go any recommendations off the top of your head? Thanks again man, you really helped me out.
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post #8 of 8
The best fan controllers I have used are Lamptron's.
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