AMD has rolled out a new graphics card to fill a gap beneath its current top-of-the-line ATI Radeon HD 2900 XT.

PowerColor's HD 2900 Pro: GDDR 4 capable

The ATI Radeon HD 2900 Pro's 320 unified Stream processors are clocked at 600MHz, down from the 2900 XT's 740MHz. Its 512MB of GDDR 3 memory connects over a 512-bit bus and runs at 800MHz, 40MHz less than the 2900 XT's video memory.

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The memory controller's also capable of supporting GDDR 4, and there's already talk of an alternative 2900 Pro with 1GB of GDDR 4 memory on board.

Boards sport a pair of dual-link DVI ports, and we'd expect them to come with an HDMI adaptor. There's video input port too, linked to the on-board AMD Xileon HDTV encode chip. The card is ready for CrossFire multi-GPU set-ups. It's compatible with DirectX 10 and Shader Model 4.0.

There's no word yet on pricing or availability.