Should I go ahead and start ordering the parts for this build?

[Legolas8181]

I want to build a computer that can max out on most games at 1080p, probably High on the more demanding ones, and I also need the PSU to be powerful enough for me to be able to OC to the CPU and then have enough SATA ports for 4 drives plus the DVD drive. My parts:

AMD FX 8320 @ 3.5GHz
AMD Radeon R9 280X
8GB DDR3 Kingston Hyper-X RAM
Asus M5A97 AM3+ chipset
650W
Corsair Carbide 300R Mid-Tower
TP-Link 300MBPS USB adapter
Windows 7 Home Premium 64-bit

I will want to play games as old as Prince of Persia (2003) to Assassin's Creed (2008) and then new games from Crysis 3 (February) to BF4 (November) on as high as I can get.

 

[Transmaniacon]

The R9-280X will max games at 1080P, that is a good choice. If an i5-4670K puts you over budget, then that 8320 is a good alternative. I would go with this PSU:

Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply ($59.99 @ NCIX US)

 

[Legolas8181]

The R9-280X will max games at 1080P, that is a good choice. If an i5-4670K puts you over budget, then that 8320 is a good alternative. I would go with this PSU:

Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply ($59.99 @ NCIX US)

Can the 650W handle overclocking?

 

[MysticalBeing]

The R9-280X will max games at 1080P, that is a good choice. If an i5-4670K puts you over budget, then that 8320 is a good alternative. I would go with this PSU:

Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply ($59.99 @ NCIX US)

Can the 650W handle overclocking?

Yeah, unless you plan on doing a crossfire setup that psu should be more than enough. If you think you are going to crossfire than get a 750w-850w psu. But other than that 650w is more than enough.