ADATA Legend 840 1Tb NVMe technical specs

Posted on November 29, 2022 by Raymond Chen

ADATA's Legend 840 NVMe SSD works on PCIe M.2 4.0 x 4 bus. More details about this NVMe SSD on this site.

ADATA Legend 840 1Tb NVMe technical specs

ADATA Legend 840 1Tb use Innogrit IG5220 controller. The Legend 840 comes equipped with 3D Nand flash memory. SSD besides, available in 512 Gb volume sizes.

Performance and benchmarks

Storage use PCIe M.2 4.0 x 4 expansion standard with read speeds 5000 Mbps, and sequential write speeds equals to 4500 MB/s. This model has IOPS 600000 on writing and 650000 on reading operations per second.

Endurance and warranty

Manufacturer give 5 years warranty period limited by endurance 650 Total Bytes Written.


Category Value
Capacity 1 Tb
Interface M.2 4.0 x 4
Controller Innogrit IG5220
Memory type 3D Nand
DRAM n/a
Read speed (Mb/s) 5000
Write speed (Mb/s) 4500
Read IOPS 650000
Write IOPS 600000
Endurance (TBW) 650
MTBF (million hours) n/a
Warranty (years) 5


Legend 840 (1Tb) produced by ADATA support PCIe 4.0 that is undoubtedly faster than previous bus standard. The write speed is 4500 Mb/s, that is common for this expansion standard. The ADATA Legend 840 provide possibility to write 650 TBW, that is not very much against nearest rivals. Overall, we advise to purchase ADATA Legend 840 1Tb for your PC.

+ Pros

  • Good writing speed
  • PCIe 4.0
  • Capacity

- Cons

  • Writing speed

Buy this or similar SSD:

Video Review

The Most Affordable PCIE Gen4x4 SSD with 5,000MB/s Read Speed - ADATA Legend 840


The ADATA Legend 840 has no DRAM in their controller or information about it is not known. Dynamic random-access memory (DRAM) makes SSD faster, but more expensive.

The Legend 840 1Tb due to the low density of memory chips able to run without further heat sinks. Some laptops or motherboards designed with additional cooling above and below the SSD to improve performance during heavy loads.

The ADATA Legend 840 1Tb has sequential write speed 4500 Mb/s, read speed 5000 Mb per second. Storage operate on Innogrit IG5220 controller and M.2 4.0 x 4 high-speed serial computer expansion bus standard. The flash memory type is 3D Nand.
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