i got these from newegg when they first came out. i agree you'll need to make sure your mobo can provide plenty of vdimm (at least 2.8). i have the dfi lanparty, which only provides vdimm of 2.7. and needless to say, i couldn't get these rams to run at anywhere near 250mhz, i think i couldn't even get to 230mhz. they went back to newegg. i now have the new geil 4000 with 2.5-7-7-4. they appear to run fine as advertised, but i'm not convinced that my computer is 100% stable. there's a review on pcstats.com on these new geil rams, and based on the review, they needed vdimm of 2.8 to run completely stable. they were able to get it to run at 260mhz on vdimm of 2.8. personally, i think the geil is a better deal at $150, but you may want to go with the kingston if you've had good experience with it. just make sure your mobo can provide enough juice to run these high speed rams.