According to the source, the company is launching the 12nm version of Polaris (dubbed Polaris 30 if the general naming conventions are followed). This should just be a more power efficient of the Polaris chip and is slated to launch sometime next week.
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AMD Polaris 30 will be based on the 12nm FinFET process and you can expect a 10-15% performance increase from the process upgrade and slightly higher clocks. It’s worth keeping in mind that 12nm FinFET is essentially just an enhanced version of 16nm FF and not an entirely new node in itself (that would be 7nm). AMD will not be rolling out its 7nm Vega 20 GPU (which
won’t be coming to the gaming market anyways) until the 12nm refresh lineup is launched so it fits in there as well.