Using version 3.5 of Epic's Unreal Engine BulletStorm is a great turn your brain off shooter with gore and humour in equal measure. Thankfully there is more than a little style thrown in there too and the game also looks great at higher detail levels.
Testing was performed at 1920x1080 (8xAA) and 5760x1080 with 4x anti-aliasing and maximum in game settings.
In our first real world test we get to see how the GTX 590 compares to the 6990 and GTX 580. Looking first at the 1920x1080 tests we see that there is a nice boost in performance when moving to the 590 though it does perform a little below the Radeon 6990 on average framerates. The two cards are matched on minimum framerate though.
Moving to 5760x1080 (which isn't possible on the GTX 580) we see that the Radeon just edges ahead on average framerate however on the more important minimum framerate our GTX 590 scored 7fps higher than the 6990.
Here are some examples of how the game looks at our tested settings.