ok,i just tried 315 x 9 to give me 2.8,loaded to windows ok,CPU-z is still telling me its 2.4 !!!!!
1:1 is written as 1:2 on my gigabyte DS3R, so thats how it should be. Check the RAM timings and settings (ctrl +F1 in bios to access extra settings).
what are your thoughts on using easy tune 5 ?