pointless upgrade?

[Sindri]

In my i7 rig currently i have 3gb of 1066 ddr3, i use it predominantly for gaming. Will upgrading to 6gb of 1333 provide a worthwhile improvement?

 

[Sindri]

I'm running 64 bit vista atm, and i play bioshock, cod 4, dow 2 and a few other fps games. I also intend on getting MW2 in november so i presumed it would benefit from the extra memory.