PC Build, Bottle necking or overkill?

[XCtoTri]

Hello everyone, I am building my first computer, but before I order the parts I want to make sure that I don't have a part that is bottlenecking the rest of the system, or one that is way overkill. My build so far is
FX-4300 CPU,
Corsair 600W M PSU,
ASRock 880GM-LE FX AM3+ AMD 880G Micro ATX AMD Motherboard,
Sapphire Radeon HD 6570 GPU, crucial ballistix tactical low profile (1x8) ram,
and probs a 750 gb7200rpm WD.
Thanks a ton in advance, and any feedback on the build itself is highly appreciated!

 

[Computerchap]

One thing I would do is go with 2x4 instead of 1x8 ram, that way it's more balanced, you could probably also go with a 500 watt PSU, then I would bump up the GPU or the CPU.