^+1. The 375 Watt power supply should be able to run the system with the HD 4670 without any problems.
Do you know if the HD 4670 graphics card is even functional?
Everthing appears to be fine after installation of the 430 watt psu. This all started with the windows experience index. Under Vista, I had a base score of 2.1 limited by graphics. I installed Windows 7 and the WEI would no longer run due to "inability to measure video playback" I ordered the 4670 card hoping to improve the playback. Installed with the Dell 375 and the unit and computer just powered on and off continuously. I put back the original card and all was well once again except getting the WEI to run. I spoke to Microsoft and got a recommendation of increasing the PSU as the card recommends at least a 400 watt..
Again, all seems to be working perfectly. The Graphic score went from 2.1 to 6.7. I'm just crossing my fingers that it continues.
Thank you for your response.