I flashed 308 the other day. Love it. Very fast post compaired to all the MF BIOS and RF 208 BIOS. Didn't notice any real increase in anything really. I did notice that you can't just use your old OC profile. I had to just manually rebuild it for it to take. But that is small cookies. I'm working on getting the Q6600 stable @ 8x450 before I start to try for 4.0ghz.