it is actually pretty decent, I got load temps of 48C with my 2500+ Oced to 2.2 ghz at 1.65 vcore. take in account that my ambient temps were pretty hot, but these temps were after some mods.
the simplest mod that improved temps the most was cutting out the back grill, and mounting a fan on the outside of the case sucking out. it seems to move more air this way, temps dropped probably 5C just from that.
the next mod I did had to do with my hardrives, I have a 30 GB and a 120 gig. the middle HDD enclosure stays pretty cool, but the lower one gets pretty hot
with no mods at all HDD temps were in the high 40C to 50C, very scary
all I did was cut out a hole for a amd stock fan I had extra, screwed it in, and now after all my mods the HDD never go above 40C
so it works pretty good without seriuos modding. I did have a Smart fan 2 and it had my temps extremely low, it was really nice, but it was to loud. if you have the ADJUSTABLE KNOB THAT WOULD WORK, BUT MY KNOB BROKE, SO THE ONLY WAY i COULD TURN DOWN THE SPEED WAS USING SPEEDFAN. BUT WHEN FIRST BOOTIG UP IT RUNS AT 100%, SO i DIDNT LIKE IT.
right now IM using a 2500 rpm led case fan, its quiet, looks cool, and is below 50C on load, so IM happy