Blimey and I thought mine ran hot!!

With that little Shuttle case and overclocking it I think the core might just explode!
Right fitted videocard back, before temps were
28 c cpu idle @2.5ghz
23 c mobo idle
38 c videocard idle
635/735 Gaming- 74 c
Now (Zalman at max)
27 c cpu idle @2.5ghz
24 c mobo idle
34 c videocard idle
635/735 Gaming- 58 c
Videocard fan is at 100% and I would say quieter than the stock at idle. The only thing that concerns me is MOSFET cooling as stock heatsink contacted the fets. But I should be ok with a 12cm fan blowing air around fets & mobo chipset.
Oh the thermel grease contact on the stock HSF was minimal a very small splodge with about half the core/heasink metal part not coated in grease

so I would say anyone with stock should regrease theirs and do it properly.
I'm using Chassis fan #2 output for the Zalman, but BIOS only has one chassis fan output (that's the Thermeltake chassis fan)

Nevermind I swapped the Thermeltake onto CH#2, put the Zalman onto CH#1, and Asus probe now reports it

at minimum rpm 1318 rpm, at maximum 2360. At max it is louder, but more of a low whoosh, way quiter than stock during gaming) and of course quieter than stock when it's at 100%. I'm twiddling my knob now

I'll leave it at minimum in Windows for a bit and get back with temp reading. Like poster said below I think suitable case cooling is required, as a mates X1800XT runs at 48 degrees in Windows idle in the Q-pack case with Nforce chipset.
ok with the Zalman at minimum idle in Windows GFX temp is 35 degrees!
