Tried the new bios 1253 and didn't like it @ all.
Not stable for me using previous settings. By per core setting wouldn't stick and it would always revert to by all cores.
Only thing I liked was that it would set my RAM to run @ 1600mhz which bios 1053 can't do even when I set it manually.
Also noticed that my system would always run @ 4.8ghz eventhough Speedstep was enabled...