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Investigations by Tom's Hardware and PC enthusiast groups revealed that certain SSDs became unrecognized by BIOS after heavy workloads or Windows updates. phison firmware
This was the testing ground for thermal management. PCIe 4.0 ran hot. Phison’s E16 firmware introduced aggressive thermal throttling level 1 (T1) and level 2 (T2). Early adopters complained that drives would slow to SATA speeds after 30 seconds of 4K video editing. The fix? Firmware updates (e.g., EGFM11.3) raised throttling thresholds from 75°C to 85°C, allowing sustained performance at the cost of higher operating temperatures—a trade-off most enthusiasts preferred. phison firmware