Bjorn3D takes a look at the HIS X1900 XTX/X1900 Crossfire Edition:

These two cards from HIS are really fast. If you want the best from ATI then these are the cards to get. The HIS X1900 XTX provides the best value since it is cheaper than it's slightly slower brother. The HIS X1900 Crossfire Edition however is the card to get if you plan on using Crossfire now or at a later date although its ~$70 premium over a regular HIS X1900 XT is pretty steep. I can't helpt to feel that NVIDIA's SLI still provides a better value since you don't need to pay a premium for a master card. Running the cards in Crossfire mode also do not really give you the same performance increase as the price increase.