Here's another PC I finished recently....somewhat different from normal. It has three fans in the rear blowing out, and a std Intel fan on the CPU. In the front there is no fan, just a large filter that the rear fans suck through, the air being drawn over two hard drives in a duct.
Front Filtered PC
In order to pull this setup off, you need to find a case with a large flat area behind the front cover of the case. This eliminates most cases...most have switches, wires, brackets, etc in this area. The filter I used here came off a Nissan Xterra...in-cabin filter. It is a micro-filter, with moderate restriction. Because of it's size, it works well in this setup
pict#1 In order to make the fans draw through the filter, all the other cracks, vent holes, cracks between drives, etc. must be covered. I used CompUSA foam in the back...covered all the unused ports.
pict#2 I do have one vertical-mounted slot fan
blowing out. The foam cuts down on the noise.
pict#3 I used an area with some vent holes...covered the rest of the area.
pict#4 Here's the hard drives sitting in the duct, in front of the filter.
pict#5 Keeping the internal cables out of the air-flow
pict#6 Showing the front of the case with all cracks covered.
pict#7 I use thin felt strips around the drives. seals the cracks.
pict#8 Tape all the cracks and seams around the drives.
pict#9 I enlarged the bottom area of the front case cover....this is where all the intake air enters. The computer sits on a Fellows roll-around stand, about 4" off the floor.
pict#10 In order to service the filter easily, the front cover of the case just pops off. Some cases require a bunch of crap to remove the cover.
pict #11 I usually use a PSU with the cables coming out of the lower rear....makes for cleaner cable routing.
pict #12 Cover the inner front of the computer an much as possible...keeps down the noise.
pict #13 If the power cables to the board are toward the front, by all means route them up and behind the PSU. This picture also shows my outside mounted de-coupled case fan
. Mounting this fan externally, improves airflow in the case.
This setup runs cool, and is pretty quiet because of no fans in the front of the computer. Fancy low-noise fans would quiet the computer, as would an expensive PSU. But I'm mostly using stock stuff with a cheap, fairly quiet Sparkle 300watt psu. This is an unknown case from a computer show. A quiet PC on the cheap.....