![]() | ||
|
|
General Liquid/Water Cooling Discussion For discussion about Full Cooling System kits, or general cooling topics. Keep specific cooling items like pumps, radiators, etc... in their specific forums. |
![]() |
Thread Tools |
![]() |
#1 |
Cooling Neophyte
Join Date: Sep 2001
Location: Chiba City
Posts: 62
|
![]()
I could have sworn a while back the general consensus was that the push/pull method of putting fans on a radiator was not recommended as it would just create turbulence. Lately I have seen more people using this method and recommending it. So what's the current recommendation?
On to the math... I've got a BI-X, and HWLabs recommends using a 100CFM fan on it. If i was to push/pull would I be able to use 2 less powerful fans? I'm not sure about the math but it would seem to me that the CFM would remain the same but the static pressure would increase. Am I right? BTW, I request we sticky a FAQ to the to of this forum with answers to questions like this... Last edited by Strafe; 06-10-2002 at 09:14 AM. |
![]() |
![]() |
![]() |
#2 |
Responsible for 2%
of all the posts here. Join Date: May 2002
Location: Texas, U.S.A.
Posts: 8,302
|
![]()
There is no general consensus, just a lot of talk... this is a forum after all! (so no FAQ!)
The push-pull setup is good/bad: it's good if you're trying to achieve a higher flow rate (of air) through a rad that has a lot of resistance. Both fans should be similar, and the idea is that the second fan helps the first one achieve its rated cfm at no load. It's bad if there is little or no air flow resistance, because the second fan can't help the first one achieve its maximum air flow rate, as it's almost already there. The second fan only draws power, with little or no benefit. Overall, the push-pull is good, if it's setup properly, and will be quieter than using a single more powerful fan, but not as energy efficient. The other debated aspect is running fans side by side, and we've had that discussion already: see the thread about dual 120mms. |
![]() |
![]() |
![]() |
#3 |
Cooling Savant
Join Date: Jan 2002
Location: Planet Earth
Posts: 312
|
![]()
So then the stronger fan should be pulling and the weaker pushing? If the fans weren't rated the same. Say like on fan is rated for 75cfm and the other 100cfm.
__________________
water cooled 1.4 tbird @ 1580 143x11 vcore 1.88 vio 3.55 |
![]() |
![]() |
![]() |
#4 |
Thermophile
Join Date: Oct 2001
Location: Nuu Zeeelin
Posts: 3,175
|
![]()
if you've got enough room to have dual fans, then why not just go for it, I doubt you'll ever find a situation where they decrease performance.
I'm not so sure about running two differant fans, I can't see why you would want to though
__________________
2x P3 1100's at 1400, Abit VP6, 2x Corsair 256mb PC150 sticks, 20gb 'cuda ATA-III, 2x 40gb 'cuda ATA-IV in raid 0. 20" Trinitron. No fans 2x 2400+ at 2288mhz (16.0 x 143), Iwill MPX2, 2x Kingmax PC-3200 256mb sticks, 4x 20gb 60gxp in Raid 5 on a Promise SX6000. Asus Ti4200 320/630. Cooled by Water |
![]() |
![]() |
![]() |
#5 | |
Responsible for 2%
of all the posts here. Join Date: May 2002
Location: Texas, U.S.A.
Posts: 8,302
|
![]() Quote:
You've got to keep in mind an objective here: are you trying to run silent, or to maximize air flow? I gotta ask because if you don't care either way, then let's talk about a blower! |
|
![]() |
![]() |
![]() |
#6 |
Cooling Neophyte
Join Date: May 2002
Location: here, there ....
Posts: 20
|
![]()
I think what we are discussing here is how to achieve the best cooling effect with a fixed cap on the noise level, or how to achieve the required cooling effect producing as little noise as possible (no real difference between the two formulations). The noise is mostly caused by turbulence in the air passing through the radiator, not by friction in the bearings of the fans (assuming the fans are decent). Now, the level of this turbulence noise is a function of the air flow through the radiator (we ignore shrouds and other things that can decrease/increase turbulence - their effects for one and two fan configurations are roughly the same). The cooling effect is also a function of the air flow through the radiator. The bottom line: there is no difference between using a single fan and a push-pull arrangement, same noise level = same cooling effect.
|
![]() |
![]() |
![]() |
#7 | |
Cooling Savant
Join Date: Jun 2002
Location: San Diego, CA
Posts: 150
|
![]() Quote:
__________________
"I believe that the moment is near when by a procedure of active paranoiac thought, it will be possible to systematize confusion to the total discrediting of the world of reality" -Salvador Dali AMD XP1600+ @1790MHz and rethinking my cooling.... MAZE3 --> DD Cooler Cube --> Eheim 1048 512MB PC2700 DDR MSI KT3 Ultra-ARU 2x 20GB Maxtor in RAID 0 1x 30GB Maxtor --> WinXP GF3 Ti200 @ 240/499 |
|
![]() |
![]() |
![]() |
#8 | |
Cooling Neophyte
Join Date: May 2002
Location: here, there ....
Posts: 20
|
![]() Quote:
|
|
![]() |
![]() |
![]() |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|