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ADATA Ultimate SU900 256 GB

256 GB
Capacity
SM2258H
Controller
MLC
Flash
SATA 6 Gbps
Interface
2.5"
Form Factor
Front
Back
Back
Package
Package
PCB Front
El Chapuzas Informatico
PCB Front
PCB Back
El Chapuzas Informatico
PCB Back
DRAM
El Chapuzas Informatico
DRAM
Flash
El Chapuzas Informatico
Flash
SSD Controller
Controller
The ADATA Ultimate SU900 was a solid-state drive in the 2.5" form factor, launched on December 13th, 2016, that is no longer in production. It was available in capacities ranging from 128 GB to 2 TB. This page reports specifications for the 256 GB variant. With the rest of the system, the ADATA Ultimate SU900 interfaces using a SATA 6 Gbps connection. The SSD controller is the SM2258H from Silicon Motion, a DRAM cache chip is available. ADATA has installed 32-layer MLC NAND flash on the Ultimate SU900, the flash chips are made by Micron. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are handled more quickly. The cache is sized at 50 GB. The Ultimate SU900 is rated for sequential read speeds of up to 560 MB/s and 520 MB/s write; random IO reaches 80K IOPS for read and 90K for writes.
At its launch, the SSD was priced at 109 USD. The warranty length is set to five years, which is an excellent warranty period. ADATA guarantees an endurance rating of 200 TBW, a typical value for consumer SSDs.

Solid-State-Drive

Capacity: 256 GB
Variants: 128 GB 256 GB 512 GB 1 TB 2 TB
Overprovisioning: 17.6 GB / 7.4 %
Production: End-of-life
Released: Dec 13th, 2016
Price at Launch: 109 USD
Part Number: ASU900SS-256GM-C
Market: Consumer

Physical

Form Factor: 2.5"
Interface: SATA 6 Gbps
Protocol: AHCI
Power Draw: Unknown

Controller

Manufacturer: Silicon Motion
Name: SM2258H
Architecture: ARC
Core Count: Single-Core
Frequency: 400 MHz
Foundry: TSMC
Process: 40 nm
Flash Channels: 4
Chip Enables: 8
Controller Features: DRAM (enabled)

NAND Flash

Manufacturer: Micron
Name: 3D MLC Gen 1
Rebranded: ADATA 60076278
Type: MLC
Technology: 32-layer
Speed: 50 MT/s .. 533 MT/s
Capacity: 4 chips @ 512 Gbit
ONFI: 4.0
Topology: Floating Gate
Dies per Chip: 2 dies @ 256 Gbit
Planes per Die: 4
Decks per Die: 2
Read Time (tR): 77 µs
Program Time (tProg): 1225 µs
Block Erase Time (tBERS): 15 ms
Die Read Speed: 820 MB/s
Die Write Speed: 52 MB/s
Endurance:
(up to)		 3000 P/E Cycles
(30000 in SLC Mode)
Page Size: 16 KB
Block Size: 1024 Pages
Plane Size: 548 Blocks

DRAM Cache

Type: DDR3L-1600 CL11
Name: NANYA NT5CC128M16IP-DI
Capacity: 256 MB
(1x 256 MB)
Organization: 2Gx16

Performance

Sequential Read: 560 MB/s
Sequential Write: 520 MB/s
Random Read: 80,000 IOPS
Random Write: 90,000 IOPS
Endurance: 200 TBW
Warranty: 5 Years
MTBF: 2.0 Million Hours
Drive Writes Per Day (DWPD): 0.4
SLC Write Cache: approx. 50 GB
(dynamic only)

Features

TRIM: Yes
SMART: Yes
Power Loss Protection: No
Encryption:
  • No
RGB Lighting: No
PS5 Compatible: No

Reviews

Notes

Drive:

There is another variant with the Silicon Motion SM2258G which is basically the same controller but different package and contact pads (BGA).
The NAND Flash Bus operates between 533 MT/s ~ 667 MT/s,
Other Revision might come with Samsung DRAM Cache (K4B2G1646F-BYK0 - 256MB DDR3L-1600Mbps CL11)
Other revision might have 8 SDP (Single Die Packages):
Micron/SpecTek: FBNL06B256G1KDBABJ4-6AS (60076854 - Adata Rebranded)

NAND Die:

Program page without/with VPP: 1300μs/1225μs (TYP) (Max - 52 MB/s per each die)
Jun 1st, 2024 19:06 EDT change timezone

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