I did have a major problem with my Ballistixs, same speed etc as i got in now, major errors, MAJOR BSOD's...as the company I bought it from are a bunch of *insert bad word here* I foned up Crucial support, sent it to them with RMA, and had a brand new replacemt set WITHIN 24hours, which I have had in my system for...well, a while now, and have had NO problems wat-so-ever. Maybe they fixed it? I did have a 1GB set of ballistixs before I got my PC4000 2GB set, and had no probs with that either. In fact I sold that on ebay when I upgraded to my current set, and had no come back on that either. Personally, I don't see a difference in performance when it comes to RAM, only if you wanna overclock it - thats when it shows stabability I feel, cheap ram is CRAP and nasty, but makes like OCZ, Corsair, Crucial - the big boys, I havent seen a MAJOR performace difference apart from overclocking stabability. (I could be wrong, but thats my experience, I just go for Crucial as their support is ace, and there stuff is nice and I don't overclock much now) I did find out that the problem before with ballistixs had sommit to do with voltage, not sure exactly wat though.