RegHardware and HardwareZone tested graphics cards based on the ATI 3870 X2. The HD 3870 X2 base model features 2 x RV670 GPUs, 825MHz Core Clock, 128 shader units (a total of 640 stream processing units), Microsoft DirectX 10.1 support, CrossFireX Multi-GPU Technology, ATI Avivo HD Video and Display Platform, 2 x 256-bit GDDR3 memory interface, 1GB DDR3 SDRAM, 1800MHz DDR Memory Clock, and Native PCI Express 2.0 x16 bus interface.
"If – and it’s a big if – you’re thinking of using a pair of Radeon HD 3870 cards in CrossFire then the X2 is a better prospect and costs the same amount of money. The problem is that CrossFire can be erratic whereas an Nvidia GeForce 8800 GTX is a cast-iron certainty for delivering the gaming goodies." [RegHardware | Sapphire ATI Radeon HD 3870 X2]
"... Performance wise, it can be spotty as it varies according to how CrossFire performs from game to game. The most intensive game at the moment, Crysis doesn't really put it in good light and our testing with the patch version 1.1 didn't help its cause. ... As for the PowerColor Radeon HD 3870 X2, it is as standard as you can find from any vendor." [HardwareZone | PowerColor Radeon HD 3870 X2 1GB]
Crossfire-inclined hardcore gamers would probably be the ones looking to snag the HD 3870 X2. As RegHardware puts it, it probably is a good idea to take a look at the SLI offerings from Nvidia.
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