https://www.polygon.com/2018/1/30/16952964/amd-radeon-gpu-supply-shortage-cryptocurrency-mining

AMD is well aware that its Radeon graphics cards are in short supply, and the company said today that it is working on that problem by manufacturing more units when possible.

Both AMD and its chief competitor, Nvidia, have dealt with incredibly high demand for GPUs over the past year — demand driven by customers looking to use graphics cards to mine for cryptocurrency such as Ethereum. AMD launched its new RX Vega series of GPUs last August, and the two graphics cards in that line (Vega 56 and Vega 64) have essentially been sold out since then. Even for custom models that use those GPUs, TechSpot reported today, “Getting your hands on any one of them is next to impossible.”