A PRE-COMPUTEX preview of DAAMIT's new RD790 chipset reveals that some boards based on the new core logic will allow for four-way Crossfire action with X1k and X2k series cards.
While a few journalists have seen this board up and running, they have been made to sign those nasty NDAs that we so love to ridicule. The chaps at OCW appear to be having none of that, releasing photos and screenshots of Quadfire in action.
The reference RD790 board comes with four full-length PCI-Express slots that run 4x8 (re-configurable to 2x16) which can be filled for eight-monitor support. OCW says that you won't see much performance benefit from two more cards linked together, but it can at least be done.
The Crossfire driver is seen to say that "Crossfire... [combines] the processing power of two or more Graphics Processing Units", which appears to confirm the more-is-more approach.
Expect to hear lots more about RD790 as Taiwanese techfest Computex approaches. Speculation as to whether four 2900 XTs might actually get somewhere approaching Nvidia's 8800 Ultra performance wasn't confirmed. Snarf.
