Everyone's suggestion seems to want you to spend $350+ on a whole new MOBO and CPU... I'm assuming you already are using an AM3+ socket mobo. If so, your cheapest option would be to go 8320, which will only give you a slight bottleneck in older games or CPU intensive games (which is a small percentage of current gen games). Otherwise it will run the 280x just as well as an i-5. You can easily OC the the 8320 to have better performance of an 8350 at stock for $50 cheaper