Bigger Power Supply needed?

[BeanTown]

Just a concern here....no big deal...but Im running an xfx 7800gt, pentium 830D, 250GB SATA2, cdrom, and 1gb ddr2, w/ ASUS p5wd2 mobo....does anyone know if 400W PS is enough to keep this system firing correctly or would you advise switching to a 500 W PS?

 

[dvdpiddy]

500w or 600w your choice i think 500w should do lets do the math go to this site

 

[RichPLS]

If it is a good PSU brand, it will probably handle it if not overclocking, but it could be utilizing up to 350watts at peaks.