Internal Solid State Drive (SSD). PCIe 4.0 x4 with NVMe 1.4. Up to 7400 MBps. Up to 6400 MBps. Ultimate Read/Write Performance Storage Expandable across Platforms with Ultra-slim Size for Easy Installation Preset Controller Solution for Optimal Quality Optimized Performance Offers Reliability and Long Lifespan S. M. A. R. Monitoring System Be Eco-friendly and Conserve the Earth Patented Graphene Heat Sink. RH 90% under 40°C (operational).