FMS 2015: Silicon Motion SM2260 PCIe 3.0 x4 NVMe Controller Spotted

Subject: Storage | August 14, 2015 - 04:44 PM |
Tagged: FMS 2015, silicon motion, SM2260, SM2256, SM2246EN, pcie, NVMe, ssd, controller

We’ve reviewed a few Silicon Motion SSDs in the past (Angelbird | Corsair Force LX | Crucial BX100), and I have always been impressed with their advances in SSD controller technology. Their SM2246EN SATA controller was launched two years ago, and strived to be a very efficient and performant unit. Based on our reviews that turned out to be true, and this allowed Silicon Motion to slide into the void left by SandForce, who repeatedly delayed their newer developments and forced the many companies who were sourcing their parts to look elsewhere.


The many SSDs using Silicon Motion’s SM2246EN controller.

Silicon motion pushed this further with their SM2256, which we first saw at the 2014 Flash Memory Summit and later saw driving SLC/TLC hybrid flash at this past Consumer Electronics Show. While the SM2256 makes its way into more and more products, I was glad to see an important addition to their lineup at this year’s FMS:


Finally we see Silicon Motion doing a PCIe controller! This is the SM2260, seen here in the M.2 form factor…


…and here in SATA Express. While the latter will likely not be as popular due to the more limited PCIe lanes present in SATA Express, I’m sure we will see this controller appearing in many PCIe devices very soon. The stated performance figures may be a bit shy of currently comparing SSDs like the Intel SSD 750 and Samsung SM951, but with the recent introduction of Z170 motherboards and RST PCIe RAID, it is now easier to RAID a smaller capacity pair of these devices, increasing the performance of slower units. Further, the point of the SM2260 is likely to get a low cost NVMe PCIe SSD controller into the hands of SSD makers, which can only mean good things for those looking to make the move away from SATA.

I’ve included Silicon Motion’s FMS press blast after the break.

Meet Silicon Motion's new flash agnostic controller

Subject: Storage | March 3, 2015 - 06:16 PM |
Tagged: tlc, ssd, SM2256, slc, silicon motion

You may remember the Silicon Motion SM2256 SSD controller that Al reported on during CES this year, even if you do not you should be interested in a controller which can work with 1x/1y/1z nm TLC NAND from any manufacturer on the market.  The SSD Review managed to get a prototype which uses the new SM2256 controller, Samsung’s 19nm TLC planar NAND flash and a Hynix 440Mhz 256MB DDR3 DRAM chip.  In benchmarking they saw 548MB/s sequential reads and 484MB/s writes, with 4K slowing down to 38MB/s for read and 110MB/s for write.  Check out the rest of the review here as well as keeping your eyes peeled for our first review of the new controller.


"Controllers are the heart and soul of every SSD. Without one, an SSD would be a useless PCB with some components slapped on it. It is responsible for everything from garbage collection and wear leveling to error correction and hardware encryption. In simple terms, all these operations can be quite complicated to implement as well as expensive to develop."

Here are some more Storage reviews from around the web:



CES 2015: Silicon Motion SM2256 seen in action, capable of hybrid TLC/SLC caching

Subject: Storage, Shows and Expos | January 8, 2015 - 01:17 AM |
Tagged: CES, ces 2015, silicon motion, SM2256, ssd, tlc, slc

We first saw the Silicon Motion SM2256 controller at Flash Memory Summit, but now we've seen it live, in action, and driving several different types of TLC NAND.


Silicon Motion had this live demo running on a testbed at their suite:


The performance looked very good considering the 2256 is designed to efficiently push TLC flash, which is slower than MLC. As their representative was explaining that the SM2256 is currently being tested with Samsung, Toshiba, and SK Hynix TLC flash, I noticed the HDTune write trace:


Those familiar with HDTune and Samsung SSDs with Samsung's TurboWrite cache (from the 840/850 EVO) will recognize the above - the SSD begins writing at SLC speed and after that cache is full, the SSD then drops to writing at TLC speed. I specifically asked about this, as we've only Samsung flash provisioned with an SLC portion of each die, and the answer was that Toshiba and SK Hynix TLC flash also supports such a subdivision. This is good news, as it means increased competition from competing SSDs that can accomplish the same SLC burst writes as the Samsung EVO series.

We heard from a few vendors that will soon be launching SM2256 equipped SSDs this year, and we eagerly await the opportunity to see what they are capable of.

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FMS 2014: Silicon Motion announces new SM2256 controller driving 1xnm TLC NAND

Subject: Storage, Shows and Expos | August 7, 2014 - 05:37 PM |
Tagged: ssd, SM2256, silicon motion, sata, FMS 2014, FMS

Silicon Motion has announced their SM2256 controller. We caught a glimpse of this new controller on the Flash Memory Summit show floor:


The big deal here is the fact that this controller is a complete drop-in solution that can drive multiple different types of flash, as seen below:


The SM2256 can drive all variants of TLC flash.

The controller itself looks to have decent specs, considering it is meant to drive 1xnm TLC flash. Just under 100k random 4k IOPS. Writes are understandably below the max saturation of SATA 6Gb/sec at 400MB/sec (writing to TLC is tricky!). There is also mention of Silicon Motion's NANDXtend Technology, which claims to add some extra ECC and DSP tech towards the end of increasing the ability to correct for bit errors in the flash (more likely as you venture into 8 bit per cell territory).

Press blast after the break: