AMD A10-Series APU A10-7850K AD785KXBJABOX
This model uses AMD’s latest Kaveri architecture, and includes a total of 12 compute cores with four CPU cores and eight GPU cores. Since it’s all on one chip, the cores work well together and can process tasks very effectively. It runs at 3.7GHz out of the box, which is quite good for an APU that you should be able to find right around $130.
This is an APU, meaning it provides both graphic and general processing power, so keep that in mind as you consider this model. You're losing some raw processing power to handle both video and graphics on your system, but it can save you a good amount of money by letting you build a solid system without a graphics card. If you plan on using a dedicated graphics card, then this is less good, but it's an especially great option for simpler, budget machines. This APU has 4MB of L2 cache memory and gives you both general and graphics processing with pretty low power requirements.