It basically supports all AM3 and AM3+ CPU's that have a 95W TDP and lower.
Thus, if you can pick up a Phenom 2 x6 1035/1045T/1055T or an FX 6100/6300/8120/8300 for your price range, go for them.
You might need to perform a BIOS update with the FX chips though.
As for Core unlocking, it's essentially a game of chance, I've had a few that unlocked into full Phenoms such as an Athlon 2 x4 620, Phenom 2 x4 960T that unlocked into a Phenom 2 x6, etc'.
Basically, just go into your BIOS and enable/set to All - "Advanced Clock Calibration" also known as ACC.
If you run into issues just reset the BIOS by disconnecting the power from your PC and removing the battery off the motherboard or finding the Bios reset jumper.
Or download CPU-Z and take a screen shot and I'll tell you if it's possible. :P
--::{PC Gaming Master Race}::--
