PDA

View Full Version : help me with MOSFET cooling solutions


Tr1cK
08-25-08, 08:10 AM
I'm looking at MOSFET cooling solutions for my Biostar TForce P43. I blew one out when overclocking my quad and want to throw a cooler on them when I get my RMA back. The MOSFETs are in line and have an area of about 60mm X 15mm with the push-pin spacing at 70mm on center.

I'm currently looking at this, but don't know which model. I have tried to email their sales support, but have not gotten a reply.
http://www.thermalright.com/new_a_page/product_page/mosfet/product_mosfet_cooler_hr09.htm
They have 8 different models and I'm not going to throw out $30 if it doesn't fit.

My other option are these units, they are small and simple, but would they be sufficient?
http://www.newegg.com/Product/Product.aspx?Item=N82E16835108094

I plan on using Artic Silver Thermal Adhesive to attach whatever I get instead of using heat tape.
http://www.newegg.com/Product/Product.aspx?Item=N82E16835100013

mullet
08-25-08, 09:55 AM
OR

http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=197&products_id=23308

http://www.nvnews.net/vbulletin/attachment.php?attachmentid=32817&stc=1&d=1219676111

http://www.nvnews.net/vbulletin/attachment.php?attachmentid=32818&stc=1&d=1219676333

XDanger
08-25-08, 10:34 AM
Arctic Alumina is the only real option yes.

I used an old dremeled up pentium 2 sink on some of mine.

The one's mullet said are the best.

My HS has a fin that directs the airflow to the mosfets, You could try a homemade one, Just a bit of curved aluminum, You could use some coke can stuck with silicone :).

Personally id buy one of these
http://www.heatsinkfactory.com/enzotech-cnb-s1-one-piece-forged-copper-chipset-cooler-p-16581.html
And hack it up.

Tr1cK
08-25-08, 11:56 AM
Thanks guys, I will get the ones that Mullet shown me and use the Arctic Alumina.


What happened was, I had my Quad running 8x 420mhz = 3.36ghz at 1.31v. The board is rated for 1600mhz FSB. I cranked up Prime95 and went to bed. I woke up to the smell of burnt electronics. The 3rd MOSFET burnt out and popped off the board some. The back side of the board is also discolored from the heat/burn. Do you think those will be sufficient to keep this from happening again?

XDanger
08-25-08, 12:25 PM
I'd say so, as long as they get good air flow.

copper conducts the heat better but aluminum dissipates heat into the air better.

Tr1cK
08-25-08, 12:27 PM
I think I will get this and trim the tabs off it. I might also add a small fan to move air over them.

http://www.enzotechnology.com/mst-780i.htm

J-Mag
08-25-08, 03:03 PM
copper conducts the heat better but aluminum dissipates heat into the air better.

Aluminum is never better than copper for conducting heat way from a thermal source. The only reason to use aluminum is because it is cheaper and less dense.

XDanger
08-25-08, 04:03 PM
Aluminum is never better than copper for conducting heat way from a thermal source. The only reason to use aluminum is because it is cheaper and less dense.

for instance...
http://www.sharkyforums.com/showthread.php?t=113724

I would not use copper where there is no airflow but this is probably an irrelevant issue/ill informed habit, Copper is better yes.


http://www.enzotechnology.com/mst-780i.htm

Nice.

Look Asus ,The fins are connected to the base of the sink!!!!

J-Mag
08-25-08, 04:18 PM
for instance...
http://www.sharkyforums.com/showthread.php?t=113724

I would not use copper where there is no airflow but this is probably an irrelevant issue.

The only poster who makes sense in that link takes my side:
http://www.sharkyforums.com/showpost.php?p=2247429&postcount=18

This idea that aluminum can be superior to copper is just one of those forum perpetuated myths.

XDanger
08-25-08, 04:39 PM
shhh, Im trying to perpetuate ;)

Tr1cK
08-25-08, 04:56 PM
As long as I don't pop another FET, then I don't care what it's made out of lol.

J-Mag
08-25-08, 05:01 PM
As long as I don't pop another FET, then I don't care what it's made out of lol.

Another? Your mobo is running?

Tr1cK
08-25-08, 06:59 PM
No, it's RMAed.