Like Intels sandy bridge processors you should be using lower voltage RAM.
1.5 volt or less .
That power supply is junk . There's a little red switch on the back to change the input voltage . Quality power supplies detect voltages and digitally adjust the outputs . Thats called " Active PCF" and you shouldnt use a psu without this . Modern processors need more stable voltages
The CX 430 will power your system well . Its a good psu and it it has the currents you need .
Here they are using an Fx 4100 and a Radeon 6950 which uses quite a bit more juice than the 6850 and only drawing 226 watts maximum . http://www.legitreviews.com/article/1766/15/
If you ever upgrade the graphics card you would need to replace it though since it only has a single pci-e power connector and more powerful cards need two