Call of Duty 4

Call of Duty 4 shows the Radeon HD 4870 outperforming the Geforce GTX 260, despite being priced $100 more than AMD's offering. What's interesting is that while at 1920 x 1200 the Radeon HD 4870 is nearly 11% faster than the GTX 260, the two perform the same at 2560 x 1600. It's not a memory bandwidth limitation since the 4870 has tons of it, so it looks like we're running into some sort of a processing power limitation.

The 4870 also nips at the heels of the GeForce GTX 280, but it cannot catch up to the performance offered by two GeForce 8800 GTs in SLI thanks to excellent SLI scaling here. As we've already seen, the Radeon HD 4850 is not only faster than the GeForce 9800 GTX but also the new 55nm GeForce 9800 GTX+.

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