Elite Bastards take a look at PowerColor's X1900 offering

As with ATI's reduced Radeon X1800 part, the X1800 GTO, the Radeon X1900 GT incorporates the full feature set of the R580 architecture, but with one functional unit disabled. The main upshot of this is that the number of pixel pipelines in this part is reduced to twelve, which also leaves the core with 36 pixel shader units compared to 48 on a full Radeon X1900. Despite being effectively 'decoupled' from the pixel pipelines in this architecture, the number of texture units in the X1900 GT is also reduced to twelve compared to sixteen on a full R580 core.

PowerColor Radeon X1900 GT video card Review