Hi everyone, I'm building a PC after many years of using laptops. I currently have a macbook pro 2010 running in boot camp and games aren't really cutting it anymore (getting 20-25 fps with Guild Wars 2). I would be playing mostly Starcraft 2, GW2, BF3, Skyrim and future games. Not too concerned with running at ultra but would be a bonus. Here's the rig I'm planning so far: 1. Motherboard - ASRock Fatal1ty Z77 Performance Motherboard 2. Graphic interface - Gigabyte GeForce GTX 670 Overclocked 2GB / Gigabyte GTX 660 TI 3. Memory - G.Skill Ares F3-1600C9D-8GAO 8GB (2x4GB) DDR3 4. CPU - i5 3570k 5. CPU Speed - 3.4Ghz 6. Power Supply Make/Model - Corsair GS-600 V2 Power Supply 7. Watt output/Amperage - 600w The whole thing is coming to around 1200 Australian dollars, for an extra 100 dollars I can get the GTX 670 OC instead of the GTX 660 TI. So is it worth it? Seem's that benchmarks are giving it an average of 10fps more, maybe I can buy another 660 down the line and use that with SLI? Not sure if that can be done, I'm fairly rusty on all this. Any advice?