Resident Evil 5
Resident Evil 5 is a survival horror video game developed and published by Capcom. The game is the seventh installment in the Resident Evil survival horror series, and was released on September 18. Resident Evil 5 revolves around Chris Redfield and Sheva Alomar as they investigate a terrorist threat in Kijuju, a fictional town in Africa.
You can see, at 2560 x 1600 there's no CPU limitation; instead we're only limited by our video cards. At 1920 x 1200 and 1680 x 1050, though, there's a clear CPU limitation with the difference between the 3.06GHz clock and 4.2GHz one being extremely large.