I bought 4G of corsair Dual DDR3 1600hz ram for my p7p55d Deluxe mobo. I can't seem to change the ram from running at 667hz to 1600hz.
I selected the option "DRAM" and changed it from auto to 1456hz. Their was no option for 1600hz only 1456 and 1756 something like that. To increase the ram frequencies is that all it takes? Also, in this bios their is no 9-9-9-24 option or anything like that. it gives me a big list all set on auto by default. Nothing about timings or anything like that. If anyone knows what im talking about please help!!
im running i7 860
More about :issue changing dram frequency p7p55d deluxe
Your RAM frequency is equal to your blck times some multiplier. For the i7 860, the two highest multipliers you have are x10 and x12. Your first screen shot shows a blck of 146. This is why you have options of setting frequncy at 1752 and 1464:
146 x 10 = 1460
146 x 12 = 1752
Good choice leaving it at 1464 while you try to get it stable.
The RAM's 9-9-9-24 numbers correspond to the first four numbers shown after the "1st Information" line on your second screenshot, and also the first four settings under that:
RAS# to CAS# Delay
RAS# PRE Time
RAS# ACT Time