Fully passively cooled computer case! You will need a few tools, a tap handle, some taps, drills, drill, pliers, maybe, a big hammer if failure looms up! However, this looks very promising and may be worth contemplating ... even, if you overkill, and add a fan, or two for back-up on cards and CPU.

http://metku.net/index.html?path=mods/passive/index_eng

Thanks Df. Always appreciated.

Just like the old PCs - heatsink but no fans.

Yeah, I remember those days. SX and DX 25s. Lots of fun. IBMs were mostly SCSI hard drives also.

Could very well turn out that future energy saving units will go a little more passive cooling. Consider, e.g., that the CPUs are ever smaller, and more energy efficient. Should be interesting if manufactures go from sub-zero high energy consumption models, to sets that are more self-contained in terms of energy savings though structure/case re-engineering.