Asus Blitz....how hot should it be?

Hi, I've just finished my first PC - its a watercooled rig with the Asus Blitz Formula (although I havent water cooled that).

The mobo came with two "optional fans" which they reccomend you install onto the heatsinks however my waterblock makes this impossible for one of them, and I do not know how to attach the second (above the waterblock -see pics below).

Does anyone have any experience with this?

I have overclocked the CPU to 380x9 = 3.4 ghz (Q6600 G0) and after running it for a while the CPU stays below 40 degrees, the MB around 55, and the northbridge around the mid-60's - is this an okay temp? and what is the max temp I should let it get to?


Ideally I would like to install the optional fans if anyone can tell me how...the manual is very unclear on this.
http://pimp-my-ipod.com/photos/DSC01717.JPG
James