Slim 140mm Fans? Also, heatsink fan questions.

IsLNdbOi · 10-22-2009, 01:09 AM

Anyone know of any slim 140mm fans that can be purchased in the USA?

I need a slim 140mm fan for an upcoming build w/ a Thermalright AXP-140.

This is what it looks like w/ a 120x20mm fan:

The ledges on the heatsink at each end of the 120mm fan are for mounting a 140mm fan. So it looks like the 140mm fan would have to be slimmer than 20mm.

I'm using the AXP-140 because it covers over both sticks of RAM and the chipset heatsink on my motherboard and a 140mm fan on it would cool everything.

If I can find a slim 140mm fan, I'd also remove the noisy 80mm fan from the PSU.

Last thing. The case is a SilverStone SG05. It has a single 120mm intake fan in the front. This is what the airflow is supposed to look like:

Fresh air is supposed to be sucked into the case by the front intake then exhausted by the 80mm PSU fan. However, Thermalright recommends installing the fan on the AXP-140 so that it blows downwards / into the AXP-140's fins. This is opposite of how the airflow is supposed to go.

What should I do w/ this setup (assuming I can find a slim 140mm fan to put on top of the AXP-140)? Follow SilverStone's intended airflow path (and have the 140mm fan on the AXP-140 blow upwards into the PSU (which has had its 80mm fan removed) or follow Thermalright's recommendation and have the 140mm fan on the AXP-140 blow downwards into the AXP-140's fins and onto all the components below the AXP-140?

Zaskar · 11-16-2009, 05:55 AM

Have it the way you showed in the picture.

If you reverse it then the fan in the power supply and on the CPU cooler will be working against each other.

flak-spammer · 11-16-2009, 07:22 AM

That heatsink will not work optimally with the fan pointed up. In fact you'll lose quite a bit of performance, mostly due to the fact that fans don't suck air very well but they push quite well.

IsLNdbOi · 11-16-2009, 09:36 AM

I've had this setup now the way it is in the picture for the past couple of weeks. Got a slim 120mm Yate Loon fan since I couldn't find a 140mm fan slimmer than 20mm. It works pretty well. It's a Q9550s so it doesn't get very hot in the first place.