Internal Solid State Drive (SSD). PCIe Gen4 16GT/s, up to 4 Lanes. Up to 5150 MBps. Up to 4850 MBps. Up to 650,000 IOPS. Up to 800,000 IOPS. 1.75 Million hours. First into the ActionGet into the match fast as you zoom past load times with blazing speeds of up to 5,150MB/s (1TB and 2TB models). Smoother, Faster GamingImprove in-game responsiveness and streaming with the PCIe Gen4 interface for a performance boost you can see and feel. The interface is compatible with leading CPU and motherboard platforms and backwards-compatible with PCIe Gen3. Store MoreAvailable in capacities up to 2TB, the WD_BLACK SN770 NVMe SSD gives you tons of storage for your latest games with space left over for future updates and downloadable content. Turbocharge Your LaptopGet up to 20% more power efficiency at maximum speed over the previous generation (1TB model) for an even better overall gaming experience on your portable rig. Game Longer and BetterOptimize peak performance in gaming mode and monitor your drive’s health with the WD_BLACK Dashboard so you can game with confidence. 32ºF to 185ºF (0ºC to 85ºC). 40ºF to 185ºF (-40ºC to 85ºC). 22 +/- 0.15mm. 80 +/- 0.15mm. 5.5g +/- 0.5g.