TurboVS
Lexar NM1090 Pro 4TB
Lexar NM990 4TB

Lexar NM1090 Pro 4TB Lexar NM990 4TB

Common Features

  • ✓ Both products are M2 type SSDs.
  • ✓ Both products have DRAM cache.
  • ✓ Both products are NVMe SSDs.
  • ✓ Both products have 4000GB of internal storage.
  • ✓ Both products support PCI Express (PCIe) version 5.
  • ✓ Both products have 8 controller channels.
  • ✓ Both products have an MTBF of 1.5 million hours.
  • ✓ Both products come with a 5-year warranty period.

Main Differences

  • • Random read speed is 2100000 IOPS on Lexar NM1090 Pro 4TB and 2000000 IOPS on Lexar NM990 4TB.
  • • Sequential write speed is 13000 MB/s on Lexar NM1090 Pro 4TB and 11000 MB/s on Lexar NM990 4TB.
  • • Random write speed is 1700000 IOPS on Lexar NM1090 Pro 4TB and 1500000 IOPS on Lexar NM990 4TB.
  • • Terabytes Written (TBW) is 2800 on Lexar NM1090 Pro 4TB and 3000 on Lexar NM990 4TB.
Specs Comparison
Lexar NM1090 Pro 4TB

Lexar NM1090 Pro 4TB

Lexar NM990 4TB

Lexar NM990 4TB

Read speed:
sequential read speed 14000 MB/s 14000 MB/s
random read speed 2100000 IOPS 2000000 IOPS

Both the Lexar NM1090 Pro 4TB and Lexar NM990 4TB offer the same sequential read speed of 14000 MB/s, meaning they perform equally in terms of continuous data transfer rates.

When it comes to random read speeds, the Lexar NM1090 Pro 4TB outperforms the Lexar NM990 4TB, with a random read speed of 2100000 IOPS compared to the latter's 2000000 IOPS.

Thus, while both products have the same sequential read performance, the NM1090 Pro offers a slightly higher random read speed by 100,000 IOPS.

Write speed:
sequential write speed 13000 MB/s 11000 MB/s
random write speed 1700000 IOPS 1500000 IOPS

The Lexar NM1090 Pro 4TB has a sequential write speed of 13000 MB/s, which is faster than the Lexar NM990 4TB's sequential write speed of 11000 MB/s. This indicates that the NM1090 Pro can handle continuous write tasks at a higher rate.

When comparing random write speeds, the NM1090 Pro again has the advantage with 1700000 IOPS, while the NM990 4TB offers a slightly lower random write speed of 1500000 IOPS.

In summary, the Lexar NM1090 Pro 4TB outperforms the Lexar NM990 4TB in both sequential and random write speeds by a noticeable margin.

General info:
type M2 M2
SSD cache DRAM cache DRAM cache
Is an NVMe SSD ✓ ✓
internal storage 4000GB 4000GB
release date April 2025 June 2025
PCI Express (PCIe) version 5 5
Controller channels 8 8
Terabytes Written (TBW) 2800 3000
MTBF 1.5million hours 1.5million hours
warranty period 5 years 5 years
Has an integrated heatsink ✕ ✕
has RGB lighting ✕ ✕

The Lexar NM1090 Pro 4TB and Lexar NM990 4TB share many key specifications. Both are M.2 NVMe SSDs with DRAM cache and have identical internal storage capacities of 4000GB. They also use PCIe version 5 and have 8 controller channels.

However, there are some differences. The NM1090 Pro has a Terabytes Written (TBW) of 2800, while the NM990 4TB has a slightly higher TBW of 3000. Both products feature an MTBF of 1.5 million hours and a 5-year warranty period. Neither has an integrated heatsink or RGB lighting.

Overall, the main distinction between the two models lies in the TBW rating, with the NM990 4TB offering a higher endurance specification.

Comparison Summary

This is a specification comparison between Lexar NM1090 Pro 4TB and Lexar NM990 4TB. Both products are M2 type SSDs with DRAM cache, NVMe support, and 4000GB internal storage. They also share PCIe 5.0 support, 8 controller channels, and a 5-year warranty. The differences include a higher random read speed of 2100000 IOPS for the NM1090 Pro, compared to 2000000 IOPS for the NM990. The sequential write speed is 13000 MB/s on the NM1090 Pro and 11000 MB/s on the NM990. Additionally, the random write speed is 1700000 IOPS on the NM1090 Pro, versus 1500000 IOPS on the NM990. Finally, the Terabytes Written (TBW) is 2800 on the NM1090 Pro and 3000 on the NM990.