Do I need a specific PSU for SLI

Hello, well I am building a new comp and using nvidias SLI technology, what i wanted to know is that if I needed a special PSU to run the pci express cards, or can I use a regular psu.

I don't think so, but as you are building a gaming system get a good one- nothing cheap. Get one that gives adequete wattage (most likely 500) and that comes with 3 years warranty - the price range you will be looking at is about £50+ - something like a hiperpower or a Tagan.

Also look at
http://www.nzone.com/object/nzone_sli_howto.html

No, you won't need a 'special' one. But I agree with profftnt, best to go for one with a good wattage.

Thanks guys, im going with thermal takes 680 watt silentpower i think its called, and its designed for sli and its going to cost me $200

but itll be worth it. I hope.

(^^;?(SLI seems to need additional 6 pin for 2 PCI Express cards.)

Then,

Standard PSU + Converter Cable (or the skill to take out 6 pins)
= SLI supported PSU

It is likely to depend upon prices in the end.

Yes, they do need an etra 6pin, but most of the "good" ones come with the pci express support, for example tale the 480W Tagan 2Force Ultra Quiet it comes with 2* pci express connectors and retails at £90. But the Thermaltake 660w will do the pci-express.