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How much temp difference with a better fan?

post #1 of 5
Thread Starter 
I have a BT on my rig that i just built, no WC yet, in fact i might not need it, I already overclocked to what i wanted, 3.5 (im at 3.520GHz right now, 440X8, 1.45VCore) and i idle at 32/36 load at 58/60. Is this safe? load temps are after a while but with throttling it can go up to 65 but then goes back down to load temp listed before. Now, i have a TT Thunderblade on it without fan controller (so its at max speed, right?) and its rated at 78CFM. I have a system papst fan which is around 150CFM, just about double the thunderblades performance. How much of a temp decrease would I expect? and with a 220CFM delta fan? how much would that help temps? approx. i know you cant get exact numbers or anything

On a TT Big Typhoon, should i have the fan blowing into the heatsink or blowing away from the heatsink? EVERYWHERE i saw it blowing into the heatsink so i have my thunderblade blowing into the heatsink right now for these temps i just reported. it surprised me though, i thought blowing away from the heatsink always got better temps and was better for other components as well, but when i switched direction temps were 3-4C higher?? so its blowing inward.

ALSO, i tried attaching a 60CFM 92mm fan to the side of the HSF. with the 120 on top blowing in, and on the right side the 92mm blowing out, which would seem to get all the hot trapped air between the pipes and the cpu away, didnt do anything to temps? what could be the reason for that?

FINALLY, i have access to a box fan (just as big as my full tower, not as thick though). It moves WELL OVER 2k CFM and i was wondering, if i had it blowing inward, would it be better not to have the thunderblade, or for taht matter, any fan on my cpu? it would only restrict the high airflow volume from the box fan right?
    
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Hard DriveOptical DriveMonitorPower
320GB Maxtor SATA2, 160 for XP, 160 for Slackware DVD+-RW EIDE 21" CRT by Sun Microsystems 680W Echostar 22A on 12V rail 
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post #2 of 5
A 150 cfm fan should drop 3-7 degrees off and a 220 should drop another 2-4.

The fan should blow into the heatsink.

I'm not sure about the box fan, but the 3 fan setup might be too much airflow in different directions. Not sure though.
post #3 of 5
Thread Starter 
thanks, how can i get 16V to it i tried -12V on the ground and 3.3V on the red which is 15.3V and it worked! got 15.2V from it, but almost no amperage so the motor wont run. i need 16V DC at ~0.5A (7.4W so little under .5A) and i canont do that unless i use like an ac adapter to a wall socket
    
CPUMotherboardGraphicsRAM
E6400 @ 3.6 GHz (450X8) GA P965 S3 7600GT 2GB OCZ Gold @ DDR 2 900 5-5-5-15 
Hard DriveOptical DriveMonitorPower
320GB Maxtor SATA2, 160 for XP, 160 for Slackware DVD+-RW EIDE 21" CRT by Sun Microsystems 680W Echostar 22A on 12V rail 
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Rosewill Black small Mid-T G5 
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CPUMotherboardGraphicsRAM
E6400 @ 3.6 GHz (450X8) GA P965 S3 7600GT 2GB OCZ Gold @ DDR 2 900 5-5-5-15 
Hard DriveOptical DriveMonitorPower
320GB Maxtor SATA2, 160 for XP, 160 for Slackware DVD+-RW EIDE 21" CRT by Sun Microsystems 680W Echostar 22A on 12V rail 
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post #4 of 5
Thread Starter 
Quote:
Originally Posted by PR1M3R View Post
A 150 cfm fan should drop 3-7 degrees off and a 220 should drop another 2-4.

The fan should blow into the heatsink.

I'm not sure about the box fan, but the 3 fan setup might be too much airflow in different directions. Not sure though.
so are you saying the fan could make temps go down 5C? thats great! now i need 80mm long bolts and nuts which i dont have
    
CPUMotherboardGraphicsRAM
E6400 @ 3.6 GHz (450X8) GA P965 S3 7600GT 2GB OCZ Gold @ DDR 2 900 5-5-5-15 
Hard DriveOptical DriveMonitorPower
320GB Maxtor SATA2, 160 for XP, 160 for Slackware DVD+-RW EIDE 21" CRT by Sun Microsystems 680W Echostar 22A on 12V rail 
CaseMouse
Rosewill Black small Mid-T G5 
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CPUMotherboardGraphicsRAM
E6400 @ 3.6 GHz (450X8) GA P965 S3 7600GT 2GB OCZ Gold @ DDR 2 900 5-5-5-15 
Hard DriveOptical DriveMonitorPower
320GB Maxtor SATA2, 160 for XP, 160 for Slackware DVD+-RW EIDE 21" CRT by Sun Microsystems 680W Echostar 22A on 12V rail 
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post #5 of 5
I'm sure you cna find those at your local hardware store
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