AMD, Austin have managed a benchmark score of X12515 in the 3DMark Vantage benchmark using two Radeon HD4870 X2 cards in CrossfireX, a feat that takes three GeForce GTX 280 cards in 3-way SLI to achieve. The R700 boards were clocked at 778 MHz core, while the GDDR5 memory was clocked at 980 MHz QDR (effectively 3.92 GHz). This brings the total on-board video bandwidth to a stellar 250.8 GBps.
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Insane score, really.