Could you take the card to the local shop and try on an xp rig, a small shop will most likely lend help, they might be interested in learning a new trick. also think about friends pc's etc. I swear by the winflash method after issues with dos flashes....for mobo's I only flash in dos if possible with cards(ATI anyway) I prefer winflash, If it errors you can load a new one and try again if a dos flash goes bad, you will have to either blindflash or PCI card it.
Bookmarks