Closing the gap: Radeon HD 5830 due January 25th.

[SlackerITGuy]

Radeon HD 5830 Specifications and Priced Revealed - Could launch in March - Softpedia

As you can expect, the Radeon HD 5830 will deliver the performance that will place it between 5850 and the 5770, as it's based on the Cypress LE core. The card will reportedly sport 1280 shaders, 60 texture units and a core speed of 750MHz for the GPU. Featured with 1GB of GDDR5 memory, clocked at 1000MHz, the difference between the 5830 and the 5850 shouldn't be that significant, in terms of performance. When you put the two side by side, the 5850 is featured with 1440 shaders and 72 texture units, while the GPU is set at 725MHz.

Is that 1GB GDDR5 128-bit or 256-bit? It doesn't say and that makes a major difference.

256-bit probably.