After testing the last PCIe 4.0 drive before the NFP425, we thought that the performance was already near the top since it was using Micron’s latest 176-layer 3D TLC NAND. Neo Forza NFP425 is here to prove us wrong: not only it has exceeded all expectations in terms of reads and writes but also comes with a large SLC cache to keep a sustain write rate for longer. The Phison controller is hard at work when the buffer is almost filled, and this can be seen from the temperatures which sometimes reach about 77 degrees Celsius; the cooling is also assisted by the top heatspreader which benefits from any active cooling inside the case.