I am having an issue with bf3 where I can play 1 game but as soon as I join another game my cpu goes to 100 percent usage and bf3 crashes. A "display device stopped working" error pops up as well.
using a i5 3570k in a asus p8z77-v lx mobo with a msi 7950
4.7 is a pretty good OC on a i5, are you sure its 100% stable? personally I'd bring it down to 4.5, you wont see any change in performance and unless someone gets a bad chip, almost all of them are capable of that overclock. Did you OC the graphics card any? also you can try going into your device manager and disabling the built in graphics on your processor.
1.48V is really, really, really high. I would back down to 4.6gHz at 1.3V. You are risking damage to your CPU at those frequencies and voltages. If you could lower the voltage to 1.334, or something, and be stable, it would be a lot safer.