Dunno if this has come up yet, but using F6A BIOS on MA790X-UD4P I found that Memtest86+ v2.11 shows my proccy to be an A64 3.1GHz, no L3, DDR1, 6-7-6 (or something way wrong) for timings.... yeah, it's just all wrong. Went to see why it was doing that and I got some sort of SMBus controller error or not found message. I have absolutely no idea what this means, and I didn't try Memtest on F5 before flashing. All I know is it was effing weird.

Can try to nab some screenies and revert to F5 after work if it helps.