Ning3n :
This goes out to lpedraja2002 and madmax032 (since the quote function is apparently broken in the latest version of Chrome).....
Dovah-chan listed a number of m-Itx tower cases that allow for a sizable amount of storage space.
madmax032... You were attempting to shoehorn a GTX480 into a 1U server chassis, and power said 480 with a 1U server PSU. A PSU that isn't designed *IN THE LEAST* to power a GPU sucking down as much power as a 480.
The failure in your posted system build, ultimately, was you.
You put the GPU in an area that wouldn't provide adequate airflow for cooling. You built the system around a 1U server PSU.
And another thing.... No matter how many air exhausts you cut into a 1U server chassis.... 3x80/92/100mm fans will NOT provide enough airflow to cool ANYthing in that tight of a case with a GTX480 facing bass-ackwards
I have been running this setup for 1 year now with no stability problems on the GTX 480. When gaming, the gpu fan never ramps to max (aka shop vac mode) and I do not have any graphics glitches/crashes or anything else.
The air coming out of the top of the case is darn hot though, I will admit that. By the time the air rushes in past the 480, cpu, ram, and power supply, it picks up alot of heat. I actually clocked the absolute maximum load wattage (at the wall, via kill-a-watt) at a smidgen over 550W, which factoring for 70% efficiency means the system draws about 385 watts max (3.3, 5, 12v combined). On that note, a GTX 480 can draw 300watts at 12V which translates to a 25 amp load on the 12v rail. The server supply has a ~40 amp 12v rail and is not overtaxed.
So all in all, I would not consider the system a resounding success since the cooling fans are louder than I would like but it works, I like it, and it makes a great lan box since it has such a small footprint on a table and it is light. The whole thing was a proof of concept to see how many watts of performance I could pack into a tiny internal volume while keeping it cool enough to be stable. To be fair, it is actually 1.3U wide since I abandoned the 1U case mod idea and went from scratch.