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radiator fan question

post #1 of 11
Thread Starter 
i plan on doing a push pull config and was wondering on what fans to get. recently purchased the sp120s but they dont provide the performance im looking for.
i looked into the sycthe gts and heard tons of great things about them so i plan on purchasing those. my question is should i use a pressure optimized fan for both the push and pull? or should i use the ap15s only for push and have an air flow optimized fan for the pull?
post #2 of 11
Quote:
Originally Posted by Lust View Post

i plan on doing a push pull config and was wondering on what fans to get. recently purchased the sp120s but they dont provide the performance im looking for.
i looked into the sycthe gts and heard tons of great things about them so i plan on purchasing those. my question is should i use a pressure optimized fan for both the push and pull? or should i use the ap15s only for push and have an air flow optimized fan for the pull?

It depends on the FPI count on your radiator. High FPI rads require high RPM fans with high static pressure, versus low FPI rads that are optimized for low RPM fans.

Do you have the quiet edition or performance edition SP120s? They offer great performance per dollar last time I checked...
post #3 of 11
Thread Starter 
Quote:
Originally Posted by aznpersuazn View Post

It depends on the FPI count on your radiator. High FPI rads require high RPM fans with high static pressure, versus low FPI rads that are optimized for low RPM fans.

Do you have the quiet edition or performance edition SP120s? They offer great performance per dollar last time I checked...

theyre performance editions. right now im just using the h100i and around 1600rpm with about 8 fans running its not that quiet.
reason why i wanted to switch over to the gts was because of better temps and quieter operation.

when i do my own wc loop im planning to get a quad 120 rad. not sure exactly what yet but didnt know that the fin density and whatnot mattered
post #4 of 11
Quote:
Originally Posted by Lust View Post

theyre performance editions. right now im just using the h100i and around 1600rpm with about 8 fans running its not that quiet.
reason why i wanted to switch over to the gts was because of better temps and quieter operation.

when i do my own wc loop im planning to get a quad 120 rad. not sure exactly what yet but didnt know that the fin density and whatnot mattered

The H100i came with 120SPL fans which are similar to the SP120 Quiet Edition fans. You would be better off getting lower RPM fans with decent static pressure. There's loads to choose from. IMO, go with these Scythe Gentle Typhoon D1225C12B4AP-14
post #5 of 11
Thread Starter 
Quote:
Originally Posted by aznpersuazn View Post

The H100i came with 120SPL fans which are similar to the SP120 Quiet Edition fans. You would be better off getting lower RPM fans with decent static pressure. There's loads to choose from. IMO, go with these Scythe Gentle Typhoon D1225C12B4AP-14

not sure if you read my whole post but i already stated i was going to buy the scythe gts and i was just wondering if it will perform better if i have an airflow optimized fan setup for pull then a static pressure fan for the push
post #6 of 11
Fin density is generally what sets the fan speed of your rig.

-Lower FPI (typically 8~11) is what is recommended for silent operation. These don't cool as well, but they are found on thicker rads, so the thickness compensates for the smaller surface area.
-Higher FPI (15~20+) requires fans that run at 1400~2000RPM, so it may not satisfy your silence needs, but cool a lot better due to the larger surface area.

There are also radiators that use split-fins like the XSPC EX and AX rads. These are actually optimized for lower RPMs despite having higher FPI, but they also produce more "air noise" due to the air having to go through many more holes.
    
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post #7 of 11
Thread Starter 
Quote:
Originally Posted by Kokin View Post

Fin density is generally what sets the fan speed of your rig.

-Lower FPI (typically 8~11) is what is recommended for silent operation. These don't cool as well, but they are found on thicker rads, so the thickness compensates for the smaller surface area.
-Higher FPI (15~20+) requires fans that run at 1400~2000RPM, so it may not satisfy your silence needs, but cool a lot better due to the larger surface area.

There are also radiators that use split-fins like the XSPC EX and AX rads. These are actually optimized for lower RPMs despite having higher FPI, but they also produce more "air noise" due to the air having to go through many more holes.

thats good to know. i was looking into buying the alphacool rad but not sure what model to go with. although this was helpful this didnt really answer my question.
post #8 of 11
Well to answer your question, you will just want the GTs on the rad. Airflow fans mean nothing when it comes to heatsinks/radiators as you rely more on static pressure to push the air through the fins. Having low pressure fans in pull won't improve performance and would just add noise to your setup.
    
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post #9 of 11
Thread Starter 
Quote:
Originally Posted by Kokin View Post

Well to answer your question, you will just want the GTs on the rad. Airflow fans mean nothing when it comes to heatsinks/radiators as you rely more on static pressure to push the air through the fins. Having low pressure fans in pull won't improve performance and would just add noise to your setup.
Quote:
Originally Posted by Kokin View Post

Well to answer your question, you will just want the GTs on the rad. Airflow fans mean nothing when it comes to heatsinks/radiators as you rely more on static pressure to push the air through the fins. Having low pressure fans in pull won't improve performance and would just add noise to your setup.

okay also as another question, what rads would you recommend for the ap15s? its doesnt have to be completely silent but i still want it moderately quiet.
post #10 of 11
Quote:
Originally Posted by Lust View Post


okay also as another question, what rads would you recommend for the ap15s? its doesnt have to be completely silent but i still want it moderately quiet.

I'd go for AP15s in pull with Noctua NF-F12s in Push

XSPC RX series V3
Edited by Wihglah - 3/7/14 at 12:57pm
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