Samsung 840 Series SSD: Cost-Efficient Performance
Introduction and Specifications
There may be an advantage in keeping all your hens in one house, so to speak, as this ostensibly gives Samsung the ability to adjust to any problems more quickly than if it had to, for example, harangue the controller manufacturer for a critical update.
In any case, the latest generation of Samsung SSDs is the 840 and 840 Pro Series, and we took the 250GB version of the 840 SSD for a spin. Not literally, of course, because these aren’t HDDs. (Nerd joke.)
NAND Flash Memory:
Random IOPS (4k):
Form Factor, Height and Weight:
|Samsung 840 Series SSD
2xnm Samsung Toggle DDR 2.0 NAND Flash Memory (400Mbps)
Sustained Sequential Reads up to: 540 MB/s
Sustained Sequential Writes up to: 250 MB/s
Reads up to: 95,000 IOPS
Writes up to: 62,000 IOPS
512MB Samsung LPDDR2 SDRAM
3-Core Samsung MDX Controller
1.5 million hours
1500G & 0.5ms (Half sine)
SATA 6Gb/s, compatible with SATA 3Gb/s and SATA 1.5Gb/s
2.5 inch, 7mm, 53.5 grams
0°C to 60°C
Samsung SmartMigration, Samsung Magician
3 year limited
The 250GB 840 has a SATA 6Gbps interface and is rated for sustained sequential read/write speeds of up to 540 MB/s and 250MB/s with up to 95,000/62,000 read/write IOPS. There’s 512MB of Samsung LPDDR2 SDRAM cache on board, as well as a 3-core Samsung MDX controller and Samsung Toggle DDR 2.0 NAND flash memory.
Looking at the PCB, you can see that it’s neat and tidy. There are 8 NAND modules on board, and all of them are on the top side and pasted in a tight, clean grouping. There’s really nothing at all on the underside of the PCB.
Samsung included wear-leveling and auto garbage collection in the 840 Series, as well as AES 256-bit encryption, TRIM support, S.M.A.R.T. support, and WWN support. The 840 SSD also comes with some free software in the form of Samsung SmartMigration and Samsung Magician.
Samsung Magician is surprisingly feature-packed and includes handy system information and links to sites with user guides and manuals, in addition to a firmware updater; performance optimization tools; OS optimization tools; and secure erase, over-provisioning, and disk clone features.
In addition to the software, the 840 comes with the boilerplate documentation as well as a 3.5-inch mounting bracket with screws and a USB-to-SATA/SATA power adapter so you can connect the SSD externally to pretty much any computer with a USB port.