User “iLeakStuff” on the Overclock3D forums has compiled information that indicates that AMD’s Polaris 10 GPU will contain 2304 shader cores, and 8 GB of GDDR5 memory. He did so by matching the PCI ID’s of the Polaris 10 GPUs(provided in a recent Linux kernel submission) to a benchmark run of a card with a matching ID on the benchmark rankings of sisoftware.net.
The card in the benchmarks is detailed as having the core clocks run at 800 mhz, but that doesn’t necessarily mean that the finished card for consumers will run at that clock rate. Engineering samples are often clocked lower for testing and stability purposes. In addition, manufacturers often factory overclock their cards before shipping them if their cooling solution is capable of handling it. It’s also important to consider that there can be multiple differently binned variants of the Polaris 10 architecture, so other GPUs might have more or less cores activated.