Originally Posted by ~Darkseeker~
AM2+ and AM3 are the same aren't they?
No, they are not. AM3 has DDR3 support, AM2+ doesn't. Some AM2+ boards are AM3 CPU compatible, but not all. It really depends on the BIOS.
There is no Athlon x4, so I think that may be a typo on the website. The Athlon II should be fine.
Originally Posted by Wrobichaud
Ok, well could you still link a decent psu for a good price? Or link what I need to look for in specs so i know it would fit my computer.
What PSU do you currently have? It's probably fine.
To answer the original question, your BIOS is out of date. Flash a newer one and it should work.