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Messing about with fans and ducts

post #1 of 6
Thread Starter 
Since I've been overvolting the PCU and RAM I noticed that the mobo getting prety warm--nothing scary but I wanted more cooling. All I have cooling the mobo is an antec LED 80mm and some acrylic ducting. I figured bigger would be better so I opened up WaterClocker and pulled the fan--since I've been finnicky routing cables and such it was a pain.

Because I water cool I use the rear fan as an intake and the blowhole as the exhaust--I have some sweet acrylic ducts that blow the air right on the chipset HS.

Then I modified a .38A Thermaltake 120mm LED I had laying around by changing out the molex with a 3 pin fan plug so I could use the Fan mate II I had laying around to control it.

Since the Lian Li has an 80mm rear fan hole I used an 80 to 120 adapter I had laying around (I got a lot of stuff laying around) and mounted it to the fan and mounted them both externally with isolators and special washers and a sweet stainless mesh filter and sleeved the cable and all that--I had to finnick the Fan Mate cable behind the cards and all that good stuff--took a while.

I couldn't use the duct however because of the way the waterblock is positioned (without a fan the spacing is wrong) but I figured the 120 would still push more air and cool everything.

Wrong--after running 2 SP2004s for an hour my mobo was running hotter than the CPU! 48C CPU 50C Mobo--crazy. That little duct apparently had been making a huge difference--part of the problem is that without a duct the PSU fan just sucks the air from the rear fan hole before it gets to the chipset HS.

Opened up the rig again and removed all my fine work and mounted a Vantec Tornado (78 CFM I think) 80MM--a loud fan if ever there was one--so again I modded the molex to a fan plug to use a controller and sleeved it and used isolators and all that.

Talk about a difference--with the fan on high it's unbearbly loud (3800 RPM 80mm fan that's extra thick--lots of cavitation) but cooled the mobo down to 32C running 2 SP2004s--the CPU liked it as well--dropping to 47C.

Even at lowest speed (2450) the Vantec Tornado is kinda loud but keeps the mobo at 36C Folding.

Goes to show that there is no replacement for displacement--but getting the air where its needed is a key factor.




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post #2 of 6
Thread Starter 
Update: manage to loosen on on the tubes on the WB and caused a tiny leak--just a few drops--but enough to knock out the Vcard (the coolant fell right on the card.

Of course I was pissed at myself for failing to double check everything before sealing up the case.

The duct I had mounted to the tornado might have been the culprit--or I might have strained the connection by rooting around in the case too roughly. At any rate I pulled everything apart for real this time--I removed the fan/duct again and broke out he belt sander and rehaped the duct to clear the WB hoses better. Then I took out the rad shroud and relieved it slightly to ease fitment of the Vcard (they keep getting bigger ). I removed the Vcard and found that it was sticky with Antifreeze and the thermal pad on the back side was like a sponge full of the stuff.

I rode over to the Auto Parts and got a can of elctromotive cleaner and gave the AGP slot a blast and hosed the card of outside--got a wicked headache from the fumes even though I had the windows open.

Spent a good deal of time swabbing the interior of the computer to sop up the stinking elctro cleaner.

Let everything dry an hour and reassembled with great care retightening all the hose fittings. Fired up the rig--still nothing. I could hear the Vcard fan running full blast--so I knew there still was a little hope--but the monitor stayed dead.

I left it overnight and this morning when I fired it up everything was back to normal!

Now that's a miracle!

So if you ever think you've trashed your Vcard because of moisture/coolant--hose it down with elctromotive spray cleaner ($3.50) and save your card!
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post #3 of 6
Thread Starter 
Update: manage to loosen on on the tubes on the WB and caused a tiny leak--just a few drops--but enough to knock out the Vcard (the coolant fell right on the card.

Of course I was pissed at myself for failing to double check everything before sealing up the case.

The duct I had mounted to the tornado might have been the culprit--or I might have strained the connection by rooting around in the case too roughly. At any rate I pulled everything apart for real this time--I removed the fan/duct again and broke out he belt sander and rehaped the duct to clear the WB hoses better. Then I took out the rad shroud and relieved it slightly to ease fitment of the Vcard (they keep getting bigger ). I removed the Vcard and found that it was sticky with Antifreeze and the thermal pad on the back side was like a sponge full of the stuff.

I rode over to the Auto Parts and got a can of elctromotive cleaner and gave the AGP slot a blast and hosed the card of outside--got a wicked headache from the fumes even though I had the windows open.

Spent a good deal of time swabbing the interior of the computer to sop up the stinking elctro cleaner.

Let everything dry an hour and reassembled with great care retightening all the hose fittings. Fired up the rig--still nothing. I could hear the Vcard fan running full blast--so I knew there still was a little hope--but the monitor stayed dead.

I left it overnight and this morning when I fired it up everything was back to normal!

Now that's a miracle!

So if you ever think you've trashed your Vcard because of moisture/coolant--hose it down with elctromotive spray cleaner ($3.50) and save your card!
Shop Dog
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post #4 of 6
Thread Starter 
Well it works for a while then blacks out--when I reboot it works again--I still have hope as it seems to be lasting a little longer each time....final word--seal your mobo and cards with dielectric sealer!
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post #5 of 6
Quote:
Originally Posted by CyberDruid
Well it works for a while then blacks out--when I reboot it works again--I still have hope as it seems to be lasting a little longer each time....final word--seal your mobo and cards with dielectric sealer!
My workplace has a goop called "conformal coating" that they put on their circuit boards that may have to be out in the weather. The stuff basically turns into a rubber coat. It's UV reactive so they can shine a black light on the boards to ensure a complete seal. It looks cool, too. I've done it to the top of my video card (since it seems to like to catch every leak that has ever been) and I haven't had any trouble since.
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post #6 of 6
Thread Starter 
Very useful idea!
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