Most of the people will probably be stuck at 500FSB - 550FSB with this board too.
This is not motherboard but a cpu related "issue".
FSB this high takes alot from the cpu too and most of the current B-stepping chips are limited to 550FSB max.
Most of the worst cpus I tested did 520FSB - 533FSB and some of the better 550FSB (in the same motherboard). The best chip I have personally seen is my old E6600 (L630A).
It did 570FSB without any problems all day long, but 575FSB locked immediately.
There are few things that can limit the FSB capabilities of a cpu.
GTLREF voltages - Without the rework (either by you or the manufacturer) this is always the biggest reason on Kentsfield, rarely on Conroe.
CPU Internal FSB PLL voltage - As far as I know there are only few motherboards that are able to adjust this voltage. In my case adjusting this voltage gave additional 25FSB (570FSB -> 595FSB) boost in the maximum benchable FSB
I´ll bet that Oskar has played around with this one too to make the cpu reach 632FSB
I did not even search the optimal "window" I just raised the voltage a bit.
The stock voltage is 1.5V and it can be adjusted on Asus P5K-series boards and most likely on LanParty X38-T2R & P35-T2R too
On Asus boards this voltage is labeled as "CPU PLL Voltage".
This voltage can be adjusted between 1.5V - 1.8V on P5K Deluxe and set either to 1.5V or 1.7V on P5K Vanilla.
NOTE: This voltage is tied with the SB voltage on Asus boards so you must enhance SB cooling before raising this voltage!
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