Asrock Rack 1U4L4E-ICX/2T 1U Rackmount General Purpose Server Barebone 4 bays NVMe and 4 bays SATA 3rd Gen Intel Xeon Scalable processors C621A - Walmart.com
Installing Additional NVMe SSD : r/ASRock
Modded BIOS CHIP ( add support PCIE NVMe SSD booting ) for ASRock motherboard | eBay
ASRock Ultra Quad M.2 Card Review - 4 x M.2 SSD RAID at 10GB/s and 932K IOPS | The SSD Review
ASRock H310CM-ITX/ac Support NVME Motherboard Mini-ITX Intel 310 Chipset 4*SATA 6Gb/s USB 3.1/HDMI/ PD LGA 1151 Interface - AliExpress
ASRock Z270 Pro4 Motherboard LGA1151 DDR4 M.2 NVMe HDMI VGA DVI ATX w I/O shield | eBay
ASRock Ultra Quad M.2 Card Review - 4 x M.2 SSD RAID at 10GB/s and 932K IOPS | The SSD Review