The Intel Optane SSD P5800X expands on Intel's fastest tier of SSD storage. We've seen Optane SSDs roll through the lab a good deal with the P4800X, which was launched a touch over four years ago. Over time Intel bumped the capacity of the drive (which started at 375GB), topping out at 1.5TB. The small capacities were okay though, as Optane SSDs we primarily designed for endurance and frequently used in a two-tier architecture.