The Apex Storage X21 brings top-tier performance and capacity to enterprise and prosumer use cases with 21 Gen4 NVMe  M.2 SSDs on a double-width PCIe add-in card (FHFL). In total, the X21 can provide 168TB of storage per card (8TB SSDs) and cranks out up to 31GB/s read speeds and over 10 million IOPS.