Aluminum is lighter and costs less to ship, but there is no consistent evidence supporting any thermal superiority, considering the aluminum cases have all the components mounted just the same way inside and the airflow patterns are very similar. Nothing that can't be explained by better thought-out fan placement or quality of fans. Now if they clamped the hard drive right up to the case metal w/ heatsink grease, maybe - but show me one that's built that way.
. If you put the
exact same set of fans at approx the same locations into one of those Evercase screwless or a Chenming variant and any aluminum case, I doubt the steel cases would give up more than 1 degC on any significant measurement - insignificant.
. When I close my Enlight 7227 (old steel) case up (often I don't even know where the cover is

) both my OC'd Duron 1200 (1320, too chicken to try higher) and the case temp stay near 20 degC w/ one 80mm slow and quiet case fan in the front (intake) and the PSU fan (exhaust - has never shifted to max speed). Since that approximates room temp, I doubt I would see improvement w/ an aluminum case

... (Two SCSI HD, one 10k one 7.2k; one IDE HD 5.4k, old hot Plextor SCSI burner, LS-120 drive, integrated KM-266 mobo, 250W Sparkle w/ thermally controlled fan).
. Besides, if I put an Al case through what my Enlight has been through, it would be a twisted lump of scrap! :Q
.b.h.
