there's only set memory ratio's like 2:8=1066mhz,2:10=1333mhz,2:12-1600mhz, there no unlinked, so setting your cpu host to 160 with uncore of 20x and memory set to 2:10 1333mhz up's your ram to 1600Mhz, running at lower or a higher ratio your memory wont be running at 1600Mhz, it works like your memory ratio times your cpu host so running at 3Ghz your ram would be 1500Mhz using a 2:10 ratio