That's a really cheap power supply:
+12v1 = 15A, +12v2=7A, +5v=28A, -12v=0.5A, +3.3v=26A,+5Vsb=2.0A
230v 50~60Hz Input Voltage."
Compare the to this 500 watter:
Antec 500 watt BASIQhttp://www.newegg.com/Product/Product.aspx?Item=N82E16817371004
A 4850 needs about 10 - 12 amps and the CPU will need 8 - 10 amps. That's 18 - 22 amps without the rest of your system.
Get a better PSU.