Me and my friend have built the same exact pc's except I have 16 gb of ram and he only has 8. We have both overclocked our i5 3570k's to 4.2 ghz and no gpu overclock on our gtx 660's. When we both play medal of honor warfighter and stand in the exact same spot facing the same way he has 80-120 fps and I only have 50-70. we both have the exact same graphics settings(ultra settings) and I don't understand how he has so much more than me. We have both checked our bios settings and we have both done the same things, oc to 4.2 ghz and turn off intel speedstep technology. I could use help from anyone, thanks.
Are you both running at the same resolution?
Do you have any additional processes/services running in the background? bittorrent/antivirus/etc...
Assuming you're in multiplayer, is either of you running the server for the game?