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The MACHINIST X99 PR9-H1 is a micro ATX board for the LGA 2011-3 socket, aimed at budget builders reusing Intel Xeon E5 V3/V4 or Core i7 chips. It takes four DDR4 slots up to 128GB in dual channel, including ECC and registered ECC memory, which is unusual at this tier. Connectivity is basic: one PCIe 3.0 x4 M.2 slot, SATA 2.0 ports, USB 2.0, PS/2 and Gigabit LAN on a Realtek 8111H. Against mainstream X99 boards it trades modern I/O and overclocking polish for cheap access to old high-core-count CPUs.
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The MACHINIST X99 PR9-H1 is a Micro ATX motherboard with an LGA 2011-3 socket. It supports Intel Core i7 and Xeon E5 V3/V4 processors, including the i7 6950X, 6900K, 6850K, 6800K, 5960X, 5930K and 5820K. It also supports the Xeon E5 1620, 1680, 2666, 2680 and 2696 V3, and the E5 1607, 2630, 2650, 2680 and 2696 V4.
It has four DDR4 slots and runs memory in dual channel. It accepts ECC, RECC and non-ECC memory at 2133 or 2400 MHz, up to 128 GB. Storage and expansion include a PCIe 3.0 slot and an NGFF/NVMe M.2 slot (PCIe 3.0 x4) with speeds up to 3600 MB/s.
The board uses a 6-layer PCB, full solid capacitors and an optimized circuit layout for stable power delivery to the CPU. Power connects through a 24+8 pin interface. Audio comes from a Realtek ALC897 codec with 2.1 channels, and networking from a Realtek 8111H Gigabit LAN port.
