Specifications of ATI’s code-named R520 VPU are unclear at this time. Some sources suggest that the chip may have up to 32 pixel pipelines and up to 350 million transistors, which makes the processor extremely complex. However, given that a new fabrication process is to be used for the manufacturing of R520, it is unlikely that the visual processing unit will be tremendously large in terms of transistor count and complex in terms of the number of pipelines. Fabless semiconductor designers tend to balance complexity of their chips for new fabrication processes. For instance, since 2002, ATI has not launched manufacturing of high-end graphics chips using a new process technology unless the technology was tested on mainstream chips. Still, even on relatively new manufacturing processes, ATI has set pretty high clock-speeds for its VPUs
