1. Introduction2. Lexar NM790 4TB3. Testing Methodology4. CrystalDiskMark5. ATTO Disk Benchmark6. AS SSD7. 128KB Sequential Performance8. 4K Random Read v QD Performance9. 4K Random Write v QD Performance10. 4K 70/30 Mixed Performance11. 4K Random Performance QD1-QD812. Throughput13. PCMark 10 Full System Drive Benchmark14. 3DMark Storage Benchmark 15. Final Fantasy XIV Endwalker Official Benchmark16. Drive Temperatures17. Real Life File Transfers18. Closing Thoughts19. View All Pages

We took note of the drive’s temperature during some of our benchmarking runs.

The only form of heatsink that the Lexar NM790 appears to have is a very thin foil built into the label covering the NAND and controller. We reckon it really does need some form of third-party heatsink or a motherboard cooling solution as it's not only a very fast drive, it does also gets very hot when pushed hard. We did our testing using the hefty built-in heatsink on our Gigabyte AORUS X670E Xtreme motherboard.

During our benchmarking runs, the hottest the drive got was 68° C during CrystalDiskMark 8 Sequential QD1-32 T1 Write test and the ATTO test, which is only 2°C away from the stated maximum operating temperature of 70°C, which is very close for comfort. But despite this, we didn't appear to see any throttle back during our tests. For the non-4 K tests the drive averaged 57°C while for the 4K-based tests, the average was 54.8°C.

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