I check p4g8x final tweaked bios 1005 with CAS=2, CAS=2.5 and official final asus bios 1007. Benchmark programs: mbench, wstream, 3dmark2001SE, super pi 1.5, GoldMemory. All of test show equality results. (GoldMemory statisicaly show equality numbers of errors when system was too overclocked not depended on setted CAS)