Need better power supply?

Im upgrading my computer and plan on geting.



Motherboard-Foxconn P35A-S LGA 775 Intel P35 ATX Intel Motherboard



Graphics card-XFX PVT80GGHD4 GeForce 8800GTS 320MB 320-bit GDDR3 PCI Express x16 HDCP Ready SLI Supported HDCP Video Card



CPU-Intel Core 2 Duo E6850 Conroe 3.0GHz 4M shared L2 Cache LGA 775 Processor





I have 500watts now but not sure if i should get a higher one.

Need to know about how big of a power supply do i need to get or is the 500 watts fine. thx|||Your 8800GTS would draw up to 9 amps on the +12V rail. Processor circuit would draw about 6 to 7 amps on same rail. If your 500W power supply has at least 25 amps on the +12V rail, it should be fine. However, if you have plans on going SLI, consider a bigger power supply with at least 35 amps on the +12V rail.|||The watts are ok as you only need a 400 watt PSU minimum but look at what amperage you have on the +12V rail(on sticker on PSU) If its less than 26 amps you need a new PSU.