Try running the RAM at Cas2 3, 3, 7 and see how high you can raise the FSB alone. Lower the multiplyer a notch or two so it is'nt the CPU crashing/causing problems. If you can get up to 220+FSB at lower timings it'll prolly(usualy does) give you a better score than lower FSB and tight timings...
NB heat can fugger up tight memory timings and high FSB's. Like Blackee' says, if it feels cool, it's not moving the heat throught it...
A revision 2.0 NF7S will walk all over that Epox mobo of yours
, that and maybe slapping a TEC on the CPU and raising it to 2500MHZ will get you there...
PS; Be aware that some NF7's have issues with Corsair TwinX modules. Normal Corsair RAM is OK, it's the 'matched pairs' SPD that is to blame somehow