ADATA XPG ATOM 50 Gen4 NVMe Solid State Drive Review

It seems as PCI-Express 4.0 NVMe solid state drives have come into their own and are more mainstream we still haven’t seen a DRAM-less solution. Well that is changing today with the ADATA XPG ATOM 50, which combines the DRAM-less InnoGrit IG5220 4-channel Gen4 x4 controller with Micron 176-layer TLC NAND flash memory running at 1600 MT/s. Without the a DRAM chip you still get SLC caching using Host Memory Buffer (HMB) which uses your system’s DRAM rather than requiring a dedicated DRAM chip. With this configuration the drive offers sequential read and write speeds of 5000 MB/s and 4500 MB/s respectively. Is this the new Gen4 drive you need? Read on as we take a look!

Special thanks to ADATA for providing us with the ATOM 50 Gen4 NVMe Solid State Drive to review.


Capacity: 1TB
Form Factor: M.2 2280
Controller: InnoGrit IG5220
Dimensions (L x W x H): 80 x 22 x 3.13mm / 3.15 x 0.87 x 0.12inch
Weight: 9g / 0.32oz
Interface: PCIe Gen4 x4
Sequential Read (Max*):
Up to 5,000MB/s (PC/Laptop)*,
Up to 5,000MB/s (PS5)
Sequential Write (Max*): Up to 4,500MB/s*
4KB Random Read IOPS(Max*): Up to 650K*
4KB Random Write IOPS(Max*): Up to 600K*
Operating Temperature: 0°C – 70°C
Storage Temperature: -40°C – 85°C
Shock Resistance: 1500G/0.5ms
MTBF: 2,000,000 hours
Terabytes Written (TBW)(Max Capacity*): 650TB**
Warranty: 5-year limited warranty***


The XPG ATOM 50 comes in the typical retail packaging we’ve seen from ADATA on their M.2 drives. So we have a small box with a picture of the drive in the center and it lets us know the capacity in the bottom corner. Currently ADATA is only offering this drive in a 1TB version, but I believe a 2TB version is coming. Flipping over to the back there is some information on the drive and a QR code you can scan.

ADATA XPG ATOM 50 Gen4 NVMe Solid State Drive ADATA XPG ATOM 50 Gen4 NVMe Solid State Drive

Opening the box up and getting everything out all you have is the XPG ATOM 50 M.2 drive as well as a metal heatspreader. The heatspreader is your thin type and does not come pre-installed on the drive, thus is optional.

ADATA XPG ATOM 50 Gen4 NVMe Solid State Drive

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