Thank you Serg008 and tonus. I modded GA-P55-UD6 bios F.10 with Dell slic+slp, using FACS method of the Andy's wonderful Award Tool 1.47. Flashed from bootable pen drive under DOS. Works perfectly.
Sorry for my post in the wrong thread, i move it in the proper thread Award & Ami Bios request. In the Asus Site, the 0702 version is the last (2010/10/08)