good... info
sounds like the card got fried, have there been any storms or surges lately?

did you get a warranty with the card? if so how long was it for. this problem could be a product defect or a refund/replace worthy issue you should call the customer support and tell them about this. if they agree to refund go buy a replacement and install but they may want to have it shipped back for repair, this could take a few weeks for return but it may come with an updated warranty.

ps isnt 4 bits just shades of gray?