I'd say your #2 setting (1600) is a bit faster. get that NB a little over spec, set it for 2200 atleast. My ram is running at 1728MHz 9-9-9-24-1t and I'm pulling about +600 more points in all 3 scores with my latency at 61.1
but how would i get the NB set to 2200?? sorry im still dont know much about the BIOS settings. im using a gigabyte 880GM-UD2H?