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Radiator + Fan questions

post #1 of 5
Thread Starter 
hey guys im being stupid right now, so if i have a FAT radiator, do i get low rpm?
and if thin i get fast rpm right?
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Sexy Red Got Wet
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CPUMotherboardGraphicsRAM
i7 920 D0 4.2GHZ evga FTW3 x58(nb/sb cooled by stacked 120mm rads) SLI Zotac gtx580 3gb (WC EK)  Corsair Dominator 6gb 1600mhz 
Hard DriveOSMonitorKeyboard
2x Raptor 150gb, 1 300gb raptor, 1 tb black caviar Win7 Ultimate (64bit) 3x Viewsonic x2268 3dVision Surround!! g-15 Logitech 
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antec 1000w Quattro antec 1200(all fans are coolermaster r4) g-500 Logitech 
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post #2 of 5
Quote:
Originally Posted by RushMore1205 View Post
hey guys im being stupid right now, so if i have a FAT radiator, do i get low rpm?
and if thin i get fast rpm right?
Other way round.

FAST RPM for FAT radiator becuase it needs more power to get through all the fins. That or a fan with decent static pressure.

You'll need FAST RPM fans on a thin radiator to make up for it's lack of surface area.

FAT radiator and push pull AP15s are quiet and awesome
post #3 of 5
For a given rad size (e.g., 120mm), the more surface area, the more powerful fans you need.

Thicker = more surface area
Higher fin density (FPI) = more surface area

So it depends on both thickness and FPI. More of either requires more powerful fans to work well.

To expand on that a bit, you can have thick, low FPI rads that will work well with low speed fans (hwlabs SR-1, XSPC RX - both around 9 FPI), and you can have thick rads that need high speed fans (hwlabs GTX, 20 FPI). Then there are thin rads with high FPI (hwlabs GTS, koolance thin rads - 30 FPI), which also need high speed fans. There are also thin-ish rads with medium FPI, like the Swiftech MCR (14 FPI), which work pretty well at most fan speeds. Anything with mid range FPI (12-15) will work well over a range of speeds.
Edited by subtec - 4/1/11 at 12:19am
post #4 of 5
Thread Starter 
yeah i dont know why i typed that, thats what i ment lol, i was just making sure, im not thinking straight today
Sexy Red Got Wet
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 D0 4.2GHZ evga FTW3 x58(nb/sb cooled by stacked 120mm rads) SLI Zotac gtx580 3gb (WC EK)  Corsair Dominator 6gb 1600mhz 
Hard DriveOSMonitorKeyboard
2x Raptor 150gb, 1 300gb raptor, 1 tb black caviar Win7 Ultimate (64bit) 3x Viewsonic x2268 3dVision Surround!! g-15 Logitech 
PowerCaseMouse
antec 1000w Quattro antec 1200(all fans are coolermaster r4) g-500 Logitech 
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Sexy Red Got Wet
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 D0 4.2GHZ evga FTW3 x58(nb/sb cooled by stacked 120mm rads) SLI Zotac gtx580 3gb (WC EK)  Corsair Dominator 6gb 1600mhz 
Hard DriveOSMonitorKeyboard
2x Raptor 150gb, 1 300gb raptor, 1 tb black caviar Win7 Ultimate (64bit) 3x Viewsonic x2268 3dVision Surround!! g-15 Logitech 
PowerCaseMouse
antec 1000w Quattro antec 1200(all fans are coolermaster r4) g-500 Logitech 
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Reply
post #5 of 5
Quote:
Originally Posted by RushMore1205 View Post
yeah i dont know why i typed that, thats what i ment lol, i was just making sure, im not thinking straight today
it's all good i do it too man.
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