I've spent the afternoon trying to cool down #1 CPU in this 1U short depth SM chassis. Absolutely nothing I did had any affect, no even removing #2 CPU and it's memory. I added 2 more 40mm fans in the front for a total of 6. I even added a fan at the rear between the MS and PS cage (it fit perfectly and required no additional support). Temps on #1 run in the high 80s to low 90s which is too hot to suit me. I'm using HWMonitor and SD 5. SD5 fluctuates between Medium and High. The fan speed up then slow down and I can see that they do so in response to rising temps shown by HWMonitor. At this point I'm thinking that this chassis is just too small to be cooled properly. Might have to move the guts into another box.