Overclock.net › Forums › Cooling › Water Cooling › Rad airflow question
New Posts  All Forums:Forum Nav:

Rad airflow question

post #1 of 9
Thread Starter 
alright I been using my WC setup for a few days now and I noticed something rather annoying

My NB fan exhausts hot air right into my rad... by placing a peice of plastic to block the fan (directing hot air up) my rad cooled off pretty quick and temps dropped like 3*C

if you look at the pics, the fan is on the outer layer blowing air out

is it worth it to turn the fan around to have air blowing in?

Should I move the fans to on the case and have those blowing in or simply reverse the fans?

If I move the fans to inbetween the case and rad... I might need to re work my tubing and spend more money on bolts... and thats more downtime

I guess my question is would it make a huge difference if I switched from a shrouded pull to a shrouded pull? and would adding 53mm of space require me to re-do my tubing (I dreally dont want to test for leaks again)

Im really confused and frustrated with this now... someone just help me clear my mind :S

pic1
pic2
pic3
pic4
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
post #2 of 9
I'd just go to the hardware store and buy a piece of plexi-glass thats a 1/8" thick and make a little 4 sided tube to fit down over the NB, put a fan on the top of the tube and just duct it out of your case..I'd think that would work pretty well, as long as you have enough space around the NB for it to fit, you wouldn't want it tight against it....It would work just like a zip-tube that guys us on their CPU's...

You can make pretty good glue from plexi scraps mixed with some acetone, I just put mine in a little jar and add enough acetone to cover it well and let it sit overnight..I put it on with a nail or knife point....

I only lost about a C going from a pull on shrouds to a push on shrouds...Thats a lot to me...
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 4545Mhz*9 w/1.29V DFI DK P45 XFX 8800 GS D9GKX & D9GMH 
Hard DriveOptical DriveOSPower
2x Seagate 160 Perp. RD-1 2x Asus Vista Premium Corsair HX 620 
Case
Open Bench 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 4545Mhz*9 w/1.29V DFI DK P45 XFX 8800 GS D9GKX & D9GMH 
Hard DriveOptical DriveOSPower
2x Seagate 160 Perp. RD-1 2x Asus Vista Premium Corsair HX 620 
Case
Open Bench 
  hide details  
Reply
post #3 of 9
Thread Starter 
well in reality I might drop a few*C by switching to push due to the heat being sucked off my motherboard

Look where the holes are, there is a voltage regulator that is pretty hot that sits right infront of the rad

What do you think?

I realize pull will get more air through... but its getting HOT air through... Im thinking I made a mistake by not mounting the fans to the case then the Rad to the case

Maybe when I get time I will move the fans back to Pull, but Im really bent on the fact that the Rad is taking in hot air off my northbrige (not as much anymore) and my voltage regulators
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
post #4 of 9
How about something like this - Clear ducting

Clear to keep with your current design.
post #5 of 9
Yeah thats true, you want the coolest air you can going through your rad...It will only be blowing a couple C hotter air over your mobo, better there instead of through your rad...

Like you said when you break it down for cleaning next time just flip the fans over onto the other side and have them pulling through the rad then...
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 4545Mhz*9 w/1.29V DFI DK P45 XFX 8800 GS D9GKX & D9GMH 
Hard DriveOptical DriveOSPower
2x Seagate 160 Perp. RD-1 2x Asus Vista Premium Corsair HX 620 
Case
Open Bench 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 4545Mhz*9 w/1.29V DFI DK P45 XFX 8800 GS D9GKX & D9GMH 
Hard DriveOptical DriveOSPower
2x Seagate 160 Perp. RD-1 2x Asus Vista Premium Corsair HX 620 
Case
Open Bench 
  hide details  
Reply
post #6 of 9
Thread Starter 
Ahh flipped em over last night and decided to let stress tests run with temp monitor

Max with the Pull off motherboard was 60*C .

Max with push into motherboard was 69*C

Idle went up my 6*C

Eff push.
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
post #7 of 9
6C is huge...I only went up a C on the GTX, it doesn't have lovured fins like the BIX, its a straight through shot so there is less air drag...

Man zip-tube that NB, you night be able to knock another C or two off...
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 4545Mhz*9 w/1.29V DFI DK P45 XFX 8800 GS D9GKX & D9GMH 
Hard DriveOptical DriveOSPower
2x Seagate 160 Perp. RD-1 2x Asus Vista Premium Corsair HX 620 
Case
Open Bench 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 4545Mhz*9 w/1.29V DFI DK P45 XFX 8800 GS D9GKX & D9GMH 
Hard DriveOptical DriveOSPower
2x Seagate 160 Perp. RD-1 2x Asus Vista Premium Corsair HX 620 
Case
Open Bench 
  hide details  
Reply
post #8 of 9
Thread Starter 
Right now all i have is a huge plastic thing in front of the NB angling air upwards enough to avoid the rad.. its working fine for now, im back to 55*C load at 4.33 ghz after blocking the hot air off my NB

I dont have money to get a tube/plexiglass ... I can prob ask my friend to make one from his milling shop from aluminum or something

Im gonna ask him to make me a pro-rad shroud for me.... You happen to have good dimensions already laid out? This is for the XtremeII rad you suggested (240) and I have 38mm fans on it

Im gonna assume aluminum is fine and cheap... will something like 1/32 sheet do? I dont want this to cost him too much
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
post #9 of 9
Quote:
Right now all i have is a huge plastic thing in front of the NB angling air upwards enough to avoid the rad.. its working fine for now, im back to 55*C load at 4.33 ghz after blocking the hot air off my NB
Nice temp's, thats what I like to see.....

You can get buy with some 22-24 gauge aluminum fine if he's going to bend it, brake it out....Like d3 did here, I think he lists what thickness sheet he used in it to...How To: Build A Performance Shroud ..The bends give it a lot of strength...The optimum depth between fan and rad is supposed to be 1.5"..Be sure to seal it all up air tight, I use clear silicone most of the time...


I don't have any dimensions for you, I make mine out of aluminum channel, so it would be a little different anyway...But I cant even find the one I used to have on my 240 BIX, I was looking for it the other day to use...If your going to go all the way from side to side and top to bottom just get him the full external measurements, that should be all he would need, I'd ask him to make sure...

Heres what the aluminum channel ones look like...




EDIT: Cheap peel and stick weather-stripping that you can get in rolls for a couple of bux are handy for sealing stuff like that up to, or stripped out neoprene if you have any...
Edited by ira-k - 6/16/08 at 2:59pm
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 4545Mhz*9 w/1.29V DFI DK P45 XFX 8800 GS D9GKX & D9GMH 
Hard DriveOptical DriveOSPower
2x Seagate 160 Perp. RD-1 2x Asus Vista Premium Corsair HX 620 
Case
Open Bench 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 4545Mhz*9 w/1.29V DFI DK P45 XFX 8800 GS D9GKX & D9GMH 
Hard DriveOptical DriveOSPower
2x Seagate 160 Perp. RD-1 2x Asus Vista Premium Corsair HX 620 
Case
Open Bench 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Water Cooling
Overclock.net › Forums › Cooling › Water Cooling › Rad airflow question