I think theres some very wrong rumors about the 1333 strap, its not even close to true that it ALWAYS gives MUCH lower performance, i think lots of those who claim that 1333strap just suxx is basing it on some SuperPi 32M runs that was posted here a while back. Real world usage doesnt have so big similarities with 32M SPI. Ofcourse theres a higher performance with FSB420/1333 than FSB400/1066 in most cases, at least it was on my Bad Axe/E6300.