Radeon X1600 PRO 512MB is a middle-class GPU based on the 90nm variant of the R500 architecture.
It's based on the RV530 Core and offers 12 Pixel Shaders, 4 TMUs and 4 ROPs, on a 128-bit of standard GDDR3. The central unit runs at 500MHz and the memory clock operates at up to 390MHz.
It's therefore a further clocked Radeon X1300 XT, equipped with GDDR3, with a 512MB frame buffer, which might prove useful in some of today's modern games, and support for crossfire. It's significantly faster than its predecessors and so some of today's games might be playable at medium settings although the low preset will have to be used on most. As it's not based on a Shader-Unified architecture, both DirectX 10 & 11 games aren't supported.