If you're a firm believer in the 'behemoth GPU', Sapphire's Radeon HD 4850 x2 will do little to sway your opinion. While it performed solidly enough in our benchmarks, it failed to match NVIDIA's single-GPU GTX 280 offering. Nevertheless, it remains a good option for any self-respecting Radeon fan with a penchant for monitors.

The Sapphire Radeon HD 4870 TOXIC is a cooler and slightly more powerful alternative to the standard HD 4870 board. It will mainly suit DIY overclockers who want to get the most out of their system without turning their PC into a furnace.

The HD 4550 is a good, affordable option for high-def movie playback and occasional gaming. However, unless you’re on a shoestring budget, we’d recommend the HD 4670 instead. It offers a vastly superior graphics performance for a slightly higher premium.

Put simply, if you need a graphics card that’s able to play most recent 3-D intensive games at reasonable performance levels, EVGA’s latest 8800GT variant is a good choice at a reasonable price.

Although this card is not bad in its own right, it lacks the punch-per-dollar provided by ATI cards in the same price-bracket. But if you're unwilling to leave the NVIDIA camp and are looking for a moderately well-performing budget option, the EVGA GeForce 9800 GT (512MB DDR3 PCI-E) is worth a look.

The Sapphire HD 4670 is an entry-level graphics card that casual users will be sure to love. Like its midrange and high-end siblings, it offers an exceptional performance for the asking price. Another Radeon winner.

The ATI Radeon HD 4670 is a mid-range graphics card decked out in entry-level clothing. While it lacks the sheer processing power of its more expensive siblings, it still packs a pretty impressive punch. With an RRP of well under $150, it’s one of the best-value cards on the market.

EVGA's e-GeForce 9600 GSO is a tasty little offering with one of the best cost-to-performance ratios we've seen. Hardcore gamers may want to cough up for something a little more gutsy, but for the asking price you can’t go wrong.

The Sapphire TOXIC HD 4850 (512MB GDDR3 PCI-E) is an excellent factory-overclocked graphics card that will offer mainstream gamers plenty of bang for their buck. Cool, fast and energy-efficient: what's not to love?

If you’re a stickler for innovation, ATI’s ‘double-or-nothing’ approach is unlikely to tickle your fancy, but it remains a powerful performer. On the other hand, its benchmark results were not as impressive as we would have liked from a top-end graphics card.

Despite some mixed benchmark results, the Sapphire Radeon HD 4870 x2 remains an appropriately high-end offering that will satisfy most enthusiasts. However, after the stellar performance of recent ATI cards we can't help but feel a little disappointed.