The Sabrent 4-Drive NVMe SSD to PCIe 3.0 x4 card (EC-P3X4) is designed to add up to four NVMe SSDs to your computer with minimal fuss. M.2 screws and a screwdriver have been included. The adapter fits M-Key 2280 SSDs and can be placed in x4/x8/x16 PCIe slots with forward and backward compatibility. This makes it ideal for adding storage to legacy machines. Your drives will stay cool, reliable, and safe thanks to the aluminum housing with built-in thermal padding. Enjoy NVMe levels of performance with support for a PCIe payload size of up to 512 bytes. Running software RAID/JBOD has never been easier. The EC-P3X4 has also been designed to be compliant with a number of power states and other features for optimal efficiency. This includes Active State Power Management (ASPM) with the L0s/L1/ L23/L3 power states and L1 sub-states. It’s also compliant with the S3 and S4 sleep states for further power control. The adapter also supports Latency Tolerance Reporting (LTR), Advanced Error Reporting (AER), and Separate Reference Clock with Independent Spread (SRIS) for maximum compatibility and state management. This makes it plug and play for most systems. Windows 8.1+ or macOS 10.3.3+ is recommended. Only compatible with M-Key NVMe SSDs. Not compatible with B-Key nor B&M-Key SSDs. SYSTEM REQUIREMENTS: • Windows 8.1 or higher. • macOS 10.3.3 or higher. PACKAGE CONTENT: • 4-Drive NVMe SSD to PCIe 3.0 x4 card. • All necessary screws and screwdriver. • User manual.Support | Backed by SABRENT: This adapter only supports M-Key NVMe SSDs, not B- or B&M-key SSDs. Supports the Windows 8.1+ and macOS 10.3.3+ operating systems. Please visit us to register your product and to engage our technical support team. Efficient | Wide power protocol support: Supports multiple power protocols including Active State Power Management (ASPM) with the L0s/L1//L23/L3 power states and L1 sub-states. The adapter is also compliant with the S3 and S4 sleep states. It supports Latency Tolerance Reporting (LTR), Advanced Error Reporting (AER), and Separate Reference Clock with Independent Spread (SRIS) for maximum efficiency. Compatible | Fast with legacy support: Fits in x4, x8, and x16 PCIe slots. The adapter card is backward compatible with PCIe 2.0/1.0 at respective maximum bandwidths.This adapter card is an effective way to add additional NVMe storage to older systems and can take advantage of higher speeds and lower latency. Supports a PCIe maximum payload size of 512 bytes for maximum performance. Resilient | Cool and Dependable: Cool your drives efficiently with the included aluminum heatsink. Integrated silicone thermal padding helps maximize heat dissipation so that your drives never throttle. The housing also adds structural support to the adapter card for more protection. Expansive | 4 NVMe SSDs with one slot: Add up to four NVMe SSDs to your computer with a single x4 PCIe 3.0 adapter card. The package includes everything necessary including M.2 screws and a screwdriver. Installation is simple and easy!.