In the ongoing saga of my OSI C4P-MF that had a PS melt down at VCF east, I determined that the whole thing, in operation, draws 7.2 amps at 5 volts. The two stock 5V supplies are rated for 3 amps each. They are obviously being over stressed. I can't point my finger at any particular "bad" component... everything seems to work just fine when given sufficient current and nothing seems to be drawing more than a few percent out of spec. Anyway, being tired of running it belly up with a large fan blowing on the PSs, I identified a small switcher that would nicely fit in some spare space near the original supplies. You can't actually remove the original supplies, their frames are integral to the structure of the machine. The supply is a Power-One MAP42-1005 available used (and cheap) from WeirdStuff (note URL broken across lines): http:www.weirdstuff.com/commerce/catalog/product.jsp ?product_id=4158&czuid=1104890632078 spec sheet here: http://xtronics.com/stock/pdf/map40.pdf It's rated for 8 amps with no significant airflow (if I understand the specs correctly) so, I'm not even pushing it to its limit. Anyway, after about 10 minutes of operation with the case open and the new PS sitting off to one side (clear all around), the two heat sinks are too hot to touch. Is that normal operation for this kind of supply? Maybe I got a bad one from WeirdStuff? Or could this be some additional clue as to something wrong somewhere else in the computer? According to my meter, the voltage is spot on 5 volts and the current is 7.2 amps. Any suggestions appreciated.