Install the latest drivers for the video card. Run a directx dialog to test them. I believe it needs that 8-pin power connector.
Originally Posted by McDown
I think 380W PSU is too weak for your build. I had the similar problem a while ago when I upgraded to Athlon X2 with the same power supply. You need more juice
Originally Posted by xandypx
from any number of websites...
this is the type of plug you need:
although you may find it less expensive elsewhere.
but you would be better off getting a different power supply with the ATX 2.2 EPS 8 pin connector on the PSU
utilizing the molex adapter, all of your power for everything comes off the +12V2 Rail rather than the +12V1 rail which is dedicated to the CPU
EDIT: A quick glance at the manual for the Mobo, shows an independant 4 pin Molex on the borad to supply power to the graphics card. The connector is labeled:
JATXPWR3: Auxiliary Power for Graphics, and is a standard molex 4 pin connector... does plugging this in help?
the manual also shows the 8pin JATXPWR2: ATX Power Source Connector as only the CPU power. so theoretically, a single 4 pin connector should provide adequate power to your AMD 2400be CPU... it's only a 45W core