AMD Radeon HD 7790 "Bonaire" Detailed Some More

@ 2013/03/11
AMD appears to have a gaping hole in its product stack, between the ~$110 Radeon HD 7770 and ~$170 Radeon HD 7850 1GB, which needs filling. NVIDIA's ~$150 GeForce GTX 650 Ti appears to be getting cozy in that gap. AMD plans to address this $110~$170 gap not by lowering price of the HD 7850 1GB, but by introducing an entirely new SKU. Since production cost on the 2.8 billion-transistor "Pitcairn" silicon is high, and since the HD 7770 maxes out feature-set of the "Cape Verde" silicon, AMD is left with only one option, to create an entirely new ASIC, which has been codenamed "Bonaire."

According to a Hardware.info report, the first SKU based on this silicon will be named Radeon HD 7790. The chip is said to pack 896 stream processors based on the Graphics CoreNext micro-architecture. It will be equipped to perform roughly 10 percent slower than the Radeon HD 7850, which should make it highly competitive with the GeForce GTX 650 Ti, giving AMD room for further price-tweaking. Bonaire could contribute to low production cost probably by a leaner transistor count, a narrower memory bus than Pitcairn (resulting in lower number of memory chips on the card), and allowing for a more cost-effective VRM. The HD 7790 is expected to be launched in April.

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