I just took delivery of my P67A-UD3. It was shipped with P3 BIOS so I knew I was going to have to flash it to run my 2600K CPU.
If I try to use qflash to flash it to P5, P6A or P6, the flashing application reports "invalid BIOS image". P4 works, which is lucky as that's the version that works with this CPU, but I thought it'd be a good idea to go to the latest version in one hit.
Why are P5, P6A and P6 all being rejected by qflash, yet P4 flashed fine?