"We classify graphics cards in three broad categories. Low-end cards provide a reasonable boost in performance over integrated graphics and can, with low-detail settings, play most modern games at a 720p resolution.
Mid-range cards, usually costing between £100-£200, offer significantly more power, enabling you to run a 1080p resolution with decent image-quality settings.
Spend a bank-busting £500 and the very best GPUs become available. Right now, AMD headlines its graphics-card act with the fearsome Radeon HD 6990 4GB monster, while NVIDIA also goes for the twin-GPU approach with its GeForce GTX 590 3GB. Both produces lusty frame-rates at an exotic 2,560x1,600-pixel resolution and vie for the title of world's fastest graphics card.
While our benchmarks show the AMD Radeon HD 6990 to be the (slightly) faster card of the two behemoths, one can make a case for NVIDIA's beastie if you only play certain games
ASUS wants to settle this 'who-is-fastest' argum...