You can find out a lot of useful information by researching the card at that particular store, and then reading the comments that have been posted online.Not to hijack your thread, but would anyone know if a 500 Watt power supply be able to handle a 1GB video card?
Somewhere within the comments some of the users of the card will state which power supply will handle the card, and what the minimum supply should be.
Now, considering that these are average users scattered around the globe, and not some paid spokesman, you will get some very helpful\ truthful bits of information.
davinci