BIOSTAR expanded its niche line of motherboards for Bitcoin-mining rigs, with two boards for the socket AM4 platform, the TA320-BTC, and the TB350-BTC. These boards feature a minimalist layout so you can drop in as many PCI-Express GPU or ASIC Bitcoin-mining cards as possible. As their names suggest, the TA320-BTC is based on the entry-level AMD A320 chipset, and the TB350-BTC the mid-range AMD B350. Both boards share an identical PCB, and barring for some chipset-level features, their feature-sets are largely identical.The boards are built in the narrow ATX form-factor, and draw power from a combination of 24-pin ATX, 4-pin Molex (optional), and 8-pin EPS power connectors. A 6-phase VRM conditions power to the SoC, which is wired to two DDR4 DIMM slots, besides a PCI-Express 3.0 x16 slot, and six other PCI-Express 3.0 x1 slots. Storage options are limited to four SATA 6 Gb/s ports. Connectivity includes 6-channel HD audio, gigabit Ethernet, DVI and D-Sub display outputs, six 5 Gbps USB 3.0 ports, and two USB 2.0 high-power ports (1.5 A current). Both boards support Ryzen processors (up to 95W TDP), and 7th gen A-Series "Bristol Ridge" APUs. Available now, the TB350-BTC is priced at USD $84.99.