my quad maxes out at around 3.8 on this nvidia board. for my 24/7 clocks, i have it set to 1.175 in bios, that translates to 1.070 under load.
1.3625 in bios translates to 1.22 under load, which results in 3.8
1.4 in bios doesnt help, the board cant really run fsb much higher than 450 with 8gb's of ram and a quad core.
id go over, but then its feeding more volts than i like at idle clocks (within .01 of what i set)
for kicks, i put the same chip in my ep45-ud3p and oc'd it to kill some time. with LLC on, 1.3625 in bios results in about 1.35 load/idle, which with some tweaking on the board and fsb volts, yields a clock of 4.2, all with volts that id be comfortable running 24/7.