I used this board for most of last year, overclocking it when i was part of the
BenchTec UK overclocking team. I was using Dry ice and a Phase Change cooler on it and benching CPu's from E2140's to E8600's and even a QX9650 (which got to 5ghz). I was also benching graphics cards in crossfire and triple crossfire. This board never let me down, was easy to use (once i'd had some time in the Bios) and was excellent for clocking Quads. For eighty quid, (@ overclockers.co.uk) it's a steal. Basically, for X48, it's either this board or the mighty Asus Rampage Extreme. Both good boards, but having used both in anger, i think i'd go for this one as it's got a more rounded performance range. Although the Rampage does excell at clocking RAM to insane speeds.
I realise that this forum doesnt delve much into heavy overclocking, but i thought i'd share my experience anyway. Good board, insane price.
One thing, if you do get it, check the Northbridge chip has good contact with it's heatsink. Boards like this and especially the Rampage extreme have generally pretty shoddy contact, which can hamper performance in the long run, and shorten the lifespan in the long term. Don't be worried though, it's easy fixed by removing it, and cleaning off the old TIM and applying some of your own. Or even using a 3rd party NB cooler. The board i had was an Engineering Sample, and as such didn't have the heatpipe or the faux LN2 pot Northbridge cooler gadget, and it managed a mighty 620mhz FSB overclock on air!!