The Corsair MP700 and MP700 PRO use the Phison PS5026-E26 controller, the same Gen5 silicon found in the Crucial T700, Sabrent Rocket 5, and Seagate FireCuda 540. Sequential write speeds reach 10,000 MB/s, but the controller draws enough power to push junction temperatures past 100C under sustained load. Corsair ships the MP700 with a heatsink on some SKUs, but many motherboard M.2 slots provide inadequate airflow for Gen5 thermal requirements.
The failure pattern: the drive operates normally for months or years under typical mixed workloads. A sustained sequential write (large file copy, game installation, OS migration) pushes the controller past its thermal throttling threshold. The firmware's thermal protection logic should reduce clock speeds before reaching the emergency shutdown temperature, but on some firmware revisions, the throttling engages too late. The controller executes an emergency power-down while a write operation is in progress, corrupting the FTL metadata stored in NAND.
On the next boot, the E26 cannot reconstruct its FTL from the corrupted metadata. The drive either disappears from BIOS entirely or shows as an uninitialized device with 0 bytes capacity. PC-3000 SSD accesses the E26 through Phison's diagnostic interface, reads the NAND contents below the failed FTL layer, and reconstructs the logical-to-physical mapping from page headers and spare area metadata.
