Hey anu76 - I got my MSI 845 ARU/1.6A combo running at 133Mhz bus for 2133Mhz. It runs stable up to 135Mhz bus at default voltage, but I haven't had any luck beyond that (I haven't tried too hard). I am happy with this speed for now - easy overclock. Many others have reported great success with the ASUS boards - both the 845 and SIS 645 versions. You're probably better off with one of these because there is much more experience to draw from here.