The mining craze now also if effecting motherboards, partners, ASUS for example just presented a motherboard based on the Intel B250 chipset. This motherboard comes with 19 pci e-slots. ASUS Mentions it you may combine eight cards, both Nvidia and AMD for a total of sixteen (with the help of risers of course).
The interesting thing that I can think about it that AMD/Nvidia drivers can support indeed only up-to 8 cards of each, ergo you must use the two vendors. There is word out that AMD however is working on a new driver that will allow for support up-to 11 cards. Then add 8 from Nvidia and you’ll have utilized at 19 slots. All slots are pci-e 3.0 x1, aside from one pci-e 3.0 x16 slot.
The board shows three 24pins 12v jacks to provide power to the pci e-slots and GPUs. ASUS also mentions that the unit has a dedicated mining bios, for optimized hash rates. The Intel B250 chipset based motherboard furthermore has two ddr4 memory DIMM slots and four sata connections, alongside a Gigabit Ethernet jack and Realtek audio.
ASUS has teased their first crypto currency mining board, the B250 Expert Mining. It’s full of expansions slots, with 19 to be exact, to pack in the most GPUs on a single system. This large number puts it at the top of the food chain for the quantity of PCIe slots suitable for mining duties. In order to support so many slots and lower the Return on Investment (ROI), ASUS implemented a unique setup for power with a Triple ATX12V (24-Pin), PCIe slot state detection, voltage stabilization capacitors for each slot, as well as using a mining specific BIOS for increased hash rates.
The reason for a shorter ROI here is the ability to use fewer parts for a given amount of graphics cards used. In other words, the outgoing cost will be less due to fewer systems needed to be built. Only one Motherboard, CPU, SSD, and set of RAM is required for 19 GPUs, saving money and lowering initial costs. According to ASUS, users are currently only able to utilize up to 16 cards due to a limit in GPU drivers. This is accomplished by using a mix of eight AMD and eight NVIDIA GPUs. Late in 2017, a new driver from AMD is supposed to launch enabling the full complement of 19 GPUs the motherboard can handle. When using more than 13 cards, the NVIDIA GPUs will need to use mining specific (P106 based) GPUs.
Of the 19 expansions slots, 18 are PCIe 3.0 x1, along with one full-length PCIe 3.0 x16 slot. ASUS separates the slots in three groups each with a dedicated 24-pin assigned to it for power. The top 24-pin covers slots 1-7 (includes the full-length slot), the middle header 8-13, with the last covering 14-19. There are also three Molex connectors for additional slot power. Along with separated power sources, each PCIe slot has its own dedicated capacitor to condition the voltage going to GPU.
|ASUS B250 Mining Expert|
|Memory||DDR4 x2, 2400 MHz|
|LAN||Intel I219V Gigabit|
|Audio||Realtek ALC997, 8-ch|
|SATA 6 Gb/s||4|
|USB 3.1 Gen 1(Back/Front)||4 / 2|
|24-pin EATXPWER Headers||3|
|Form Factor||ATX, 12 x 9.1 in.|