As you can see in the benchmarks above, ARMA II is an incredibly demanding game Ė GTX 285 and Radeon 4890 cards struggle to hit average frame rates in the mid 40s at just 1600x1200 resolution. Youíll also notice that performance doesnít drop off as dramatically as other games as we scaled from 1600x1200 to 1920x1200; a clear indication of the importance of the CPU even at these high settings.
The 4890 delivered very impressive performance in ARMA II considering its current price tag; at 16x12 it actually outran all comers although by 2560x1600 it falls behind the GTX 275. The GTX 275 and 4890 are separated by very narrow margins though, at 16x12 the GTX 275 is behind by 7% but pulls ahead by 3% at 2560x1600. The Radeon 4870 also outruns its closest competitor, the GeForce GTX 260 with 192 stream processors and the newer 216 stream processor variant.
The GTX 285 delivers the best overall performance across all resolutions, but even at its best (2560x1600), itís only ahead of the GTX 275 by 6%.
The dual GPU cards, ATIís Radeon 4870 X2 and the GeForce GTX 295 donít scale at this time with ARMA II. In fact, due to added overhead they actually perform worse than their single-GPU counterparts.