TweakTown has found a Master x1900, and they immediately slapped it into a system with a X1900XTX, and set them up in Crossfire.   This resulted in fairly impressive benchamrks, and also gives you a rare look into setting up a Crossfire system.
“With the launch of the Radeon X1900XT and X1900XTX last month, CrossFire cards of this new Radeon series have already popped up at a few places but aren’t in full swing as most people would like. Today thanks to our friends over at HIS in Hong Kong we have got ourselves an X1900 master card along with an X1900XTX as a slave card.””

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