x1900xtx in my hand

Can you use X1900XT crossfire with a X1800XT as the second card?

I'm afraid not. You could try to see if it works, but the bottleneck would be too much for it to produce any substantial gain vs X1800 CF results.

Perkam

Good results so far.

...though you can find the X1800CF for relatively cheap nowadays...http://www.tigerdirect.com/applicati...OTC-GOOGLEBASE

Perkam