ADATA Introduces Premier SP580 SSD: TLC NAND, LDPC and Marvell Controllerby Anton Shilov on June 16, 2016 8:00 AM EST
Last week, ADATA announced its new inexpensive lineup of SATA SSDs: the new Premier SP580 drives use Marvell’s 'Artemis' controller aimed at value storage, as well as TLC NAND flash from SanDisk.
The new ADATA Premier SP580 family consists of two models, with 120 GB and 240 GB of TLC NAND produced using 15 nm process technology by SanDisk. The new drives are based on the Marvell 88NV1120 controller and do not use DRAM cache, which lowers their cost and puts them further into the cheap SSD category: DRAM-less controllers are expected to populate the low-cost segment over the next year. The manufacturer declares 560 MB/s / 410 MB/s maximum sequential speed for the 120 GB version of the SP580 SSD. ADATA notes that the 120 GB version is slower than the higher-capacity model, but does not elaborate as to the 240GB specification. Keeping in mind SATA performance limitations and how these drives work, read performance of both Premier SP580 SSDs should be similar, but expect the 240 GB model to offer slightly better write performance.
|ADATA Premier SP580|
|NAND||SanDisk 15 nm TLC|
|Sequential Read||Up to 560 MB/s|
|Sequential Write||Up to 410 MB/s||>410 MB/s|
|TBW||70 TBW||>70 TBW|
|MTBF||1.5 million hours|
The Marvell 88NV1120 controller was specifically designed for entry-level SATA drives. It enables SSD makers to build DRAM-less solid-state storage devices and supports pseudo-SLC caching to speed up writing performance of TLC NAND-based drives, a near-must feature on low capacity hardware. One of the most important capabilities of the Artemis controllers is support for Marvell’s third-generation NANDEdge error correction control and management technology. This is based on low-density parity-check (LDPC) code and reduces data errors, improves data integrity and thus should increase the endurance of NAND from constant rewrites.
Formally, the Adata Premier SP580 is positioned above the Adata Premier SP550, which was introduced in August 2015, and should be one of the most affordable SSDs available. The SP550 is based on the Silicon Motion SM2246EN controller as well as TLC NAND from SK Hynix. Performance specifications declared by the manufacturer are similar for both drives, hence, it is impossible to even make guesses regarding their real-world performance because of different controllers and different memory.
What should be kept in mind is that the SP580 is DRAM-less and could be $1.5 – $2 cheaper (the average spot price of one 4Gb DDR3-1600 memory chip at press time was $1.454) to make than the SP550, assuming that other costs (NAND flash, controller, etc.) are the same. If ADATA managed to make a DRAM-less SSD faster than a drive with DRAM cache, this could be an important achievement. In particular, it could enable manufacturers to improve the performance of inexpensive SSDs while making them even more affordable.
The manufacturer plans to release the 120 GB model first and then follow up with higher-performance 240 GB configuration. The more affordable model carries a $49.99 price tag, whereas the 240 GB version will have MSRP of around $79.99.
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BurntMyBacon - Monday, June 20, 2016 - link"This is based on low-density parity-check (LDPC) code and reduces data errors, improves data integrity and thus should increase the endurance of NAND from constant rewrites."
Error checking, if implemented correctly, may help reduce data errors (or rather correct them) and thus help data integrity. Error checking DOES NOT, however, increase endurance of NAND cells. The error checking methods often used in conjunction with TLC NAND will allow you to continued to use blocks with bad cells up to a point, but cells still wear out with the normal number of writes. If you want to increase endurance, look to better NAND, Load balancing ,and reductions to write amplification.