Since I've done something similar with the new Metro ( Last Light ) for another guy on another forum, I thought it wouldn't hurt to post them here too.
( I believe I don't need to point out that in most benchmarks a 1fps-1.5fps variance is within the standard run to run deviation )
CPU: Core i7-3770K @ 4.4GHz
RAM: DDR3-800, DDR3-1333, DDR3-2000
Metro Last Light - 1920x1080 max details SSAA on Tessallation Very High
First AIDA64 Cache & Mem bandwidth test and then Metro Last Light built-in benchmark resultsDDR3-800 11-12-11-31 Loose sub-timingsDDR3-1333 10-10-10-24 Moderate sub-timingsDDR3-2000 7-7-7-21 Tight sub-timings