I have a Asus P5QPL-AM motherboard and Intel Core 2 Duo processor 2.8GHz with Nvidia Geforce GT430 1GBDDR3 with 3GB RAM and 750GB hard disk.I wanted to know that which powersupply will be suitable for my PC?

I only have one but I have seen people who have many.I wanted to know how to get them.

Thanks for answering.

I was hoping to buy Nvidia GT430 but my ASUS P5QPL-AM has a PCIe1.1x16 slot.I have searched many sites and people say that PCIe2.0x16 card work on PCIe1.1x16 slot.Can anyone confirm it!