Back in February, NVIDIA has announced its GPU SKUs dedicated to the cryptocurrency mining task, without any graphics outputs present on the chips. Today, we are getting information that AMD is rumored to introduce its own lineup of graphics cards dedicated to cryptocurrency mining. In the latest patch for AMD Direct Rendering Manager (DRM), a subsystem of the Linux kernel responsible for interfacing with GPUs, we see the appearance of the Navi 12. This GPU SKU was not used for anything except Apple's Mac devices in a form of Radeon Pro 5600M GPU. However, it seems like the Navi 12 could join forces with Navi 10 GPU SKU and become a part of special "blockchain" GPUs.

Way back in November, popular hardware leaker, KOMACHI, has noted that AMD is preparing three additional Radeon SKUs called Radeon RX 5700XTB, RX 5700B, and RX 5500XTB. The "B" added to the end of each name is denoting the blockchain revision, made specifically for crypto-mining. When it comes to specifications of the upcoming mining-specific AMD GPUs, we know that both use first-generation RDNA architecture and have 2560 Stream Processors (40 Compute Units). Memory configuration for these cards remains unknown, as AMD surely won't be putting HBM2 stacks for mining like it did with Navi 12 GPU. All that remains is to wait and see what AMD announces in the coming months.

Benchmarks of the new Apple-exclusive AMD Radeon Pro 5600M graphics solution by Max Tech reveals that the new GPU is about 50% faster than the Radeon Pro 5500M, and within striking distance of the Radeon Pro Vega 48 found in Apple's 5K iMacs. The Pro 5600M is an Apple-exclusive solution by AMD, based on the "Navi 12" silicon that features a 7 nm GPU die based on the RDNA graphics architecture, flanked by two 4 GB HBM2 memory stacks over a 2048-bit interface. The GPU die features 2,560 stream processors, but clocked differently from Radeon Pro discrete graphics cards based on the "Navi 10" ASIC that uses conventional GDDR6.

The Radeon Pro 5600M solution was found to be 50.1 percent faster than the Radeon Pro 5500M in Geekbench 5 Metal (another Apple-exclusive SKU found in 16-inch MacBook Pros), and just 12.9 percent behind the Radeon Vega 48. The Vega 56 found in iMac Pro is still ahead. Unigine Heaven sees the Pro 5600M being 48.1% faster than the Pro 5500M, and interestingly, faster than Vega 48 by 11.3%. With 2,560 RDNA stream processors, you'd expect more performance, but this card was designed to meet stringent power limits of 50 W, and has significantly lower clock-speeds than "Navi 10" based Radeon Pro graphics cards (1035 MHz max boost engine clock vs. 1930 MHz and 205 W TDP of the Pro W5700). Find more interesting commentary in the Max Tech video presentation.

Out of the blue, AMD announced its Radeon Pro 5600M mobile discrete graphics solution exclusive for Apple's 16-inch MacBook Pro. It turns out that the Pro 5600M is based on an all new ASIC by AMD, codenamed "Navi 12." This is a multi-chip module, much like "Vega 20," featuring a 7 nm GPU die and two 16 Gbit (4 GB) HBM2 memory stacks sitting on an interposer. While the actual specs of the GPU die on the "Navi 14" aren't known, on the Pro 5600M, it is configured with 40 RDNA compute units amounting to 2,560 stream processors, 160 TMUs, and possibly 64 ROPs.

The engine clock of the Pro 5600M is set at up to 1035 MHz. The HBM2 memory is clocked at 1.54 Gbps, which at the 2048-bit bus width, translates to 394 GB/s of memory bandwidth. There are two big takeaways from this expensive-looking ASIC design: a significantly smaller PCB footprint compared to a "Navi 10" ASIC with its eight GDDR6 memory chips; and a significantly lower power envelope. AMD rates the typical power at just 50 W. In the render below, the new ASIC is shown next to a "Navi 14" ASIC that power RX/Pro 5500-series SKUs.