I've been thinking of upgrading my computer for a bit, and I want to run three monitors(3x1080p so 5760x1080). My pc has an i5-2500, GTX 560 (non ti), 600w power supply and pci-e 2 supporting motherboard. I plan on replacing the GPU with a GTX 770 (with 4GB of memory). When running most demanding games such as Skyrim or GW2 my GPU load is 99% while the CPU load is around 50-60%. Will I need to upgrade my CPU to an ivy bridge one (preferably a i5-3570k) and should I replace my power supply to a 700w+ one, even though the GTX 770 requires a minimum of 600w? Thanks.