Cross fire 2900gt and 3800 series?

[biteme262001]

Can you crossfire a 2900gt and a 3800 series card?
I had a 2900pro i bought a new motherboard and 2900gt to go crossfire.

I built up the system but my 2900pro wouldnt work after rebuild, now i got a sapphire card, and the site for sapphire said RMA was through the retailer, no probs there i phoned ebuyer and it was picked up the next day.

Got a email telling me the the card was no longer getting made and there was none in stock so i got store credit (it was in manufacters warrenty but not ebuyers, so store credit was best i could do) plus 10% for my troubles.
Only thing is i now have a 2900gt (ok i suppose) instead of my pro, a crossfire board and money from ebuyer to spend on anything i want, ebuyer does have a 2900 gt but i really dont want to downgrade from my 1st card, the pro, what are my options here?

 

[CPTMuller]

You couldn't crossfire it with a newer card IE 3800 series, and to be frank crossfire and SLI really lack the kick necessary to make it worth the costs. Though that is my personal opinion. My personal suggestion would be to sell your current card and buy something better, though I would think your card is good enough for the time being.
{edit}
I may have misread your post. If you have to spend the money on this ebay store, than you could just buy it and resell it somewhere, and I suppose if need be you could crossfire it with another one.