Did you have a budget in mind? "Small bugdet for gaming" typically means AMD Athlon X4. The X4 635 or 640 are good choices for a small overclock on the stock cooler. There are lots of MB choices out there (Asus, Gigabyte, etc...). Look for an 800 series chipset, 2xPCIe x16, USB 3.0.... On the GPU front, the 5770 is a good performer at a good price point.