and you have to increase your vcore or you risk frying your memory controller
he said XP-M, NFORCE2 BAKA!! no mem controllers.
On an Nforce2 board you'll be lucky to even get up to 250MHz just because the north bridge won't want to handle it. You'll need aftermarket cooling on the northbridge, pump extra voltage to the NB as well and if your board can't supply enough a voltage mod may be in order.
Considering 250Mhz would be very lucky on an nf2 platform I'd go with BH-5's just so you can use 2-2-2-5 timings all the way but it'll still require atleast 3.2v dimm probably