Features: PEX88048 PCIe switching chip is adopted, and there is not need for motherboard to support PCIe channel splitting. the chip can intelligently distribute x16 channels into four port, which is perfectly for all mainstream platforms. PCIe is fully supported, and the theoretical bandwidth of single port is as high as 64Gbps. Four NVMe can work in PCIe mode at the same time, giving full play to the extreme reading and writing hard drives. SFF-8654)8i port are used to connection with the motherboard. Can provide PCIe bandwidth, and the two port together form x16 channel. Allows users to flexibly choose to install NVMe with different specifications (2230/2242/2260/2280/22110). Widely suitable for most hard drives supporting NVMe . The aluminum alloy heat dissipation vest fully covers the main control chip and NVMe , and is equipped with thermal pad, which can quickly absorb and disperse the huge heat generated during fast speed reading and writing, effectively prevent the from slowing down due to overheating Specifications: Component:Metal Chip: PEX88048 Size:Approx.230x125x98mm/9.05x4.92x3.85inch Package Includes: 1Pc Expansion Card note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.