Samsung SZ985 collects 64 layers of 3D SLC to grab the opportunity of Intel Optane

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Date: 2017-11-20

Semiconductor giant Intel (Intel) officially launched in early 2017 and storage plant meguiar's cooperation (Micron) 3 d XPoint flash memory, and its use in Intel Optane series of products, assist with traditional hard disk boot the computer in the past, reduced the boot time. Especially in the case of extremely low latency, 3D XPoint flash memory has outstanding random performance, which is several times faster than the current SSD. In the face of growing market optimism about 3D XPoint flash memory, samsung, the global storage powerhouse, has launched a similar product, the z-ssd of z-nand flash memory.


Compared to Intel's Optane DC P4800X in 3D XPoint with 350GB and 750GB, samsung's first SSD with z-nand is SZ985, with only 800GB of a capacity. Using the pci-e card specification with HHHL half high and half high, the pci-e 3.0 x 4 interface was used, the continuous reading and writing speed was 3.2 GB/s, the maximum random reading and reading IOPS was 750K / 170K, the reading delay was 12-20us, and the delay was 16us.

Z-nand's SSD specification, compared with the 3D XPoint Optane DC P4800X, 3D XPoint reads and reads at 2.4/2GB/s, the maximum random reading and reading IOPS is 550K / 500K, and the read-write delay is 10u. Samsung's z-nand performance is not bad on the data, but the low latency advantage of 3D XPoint is still considerable. 3D XPoint is still a technical advantage in the case of both parties with a tolerance of 30 DWPD.


In addition, samsung's z-nand is less revolutionary and innovative than Intel and micron 3D XPoint. The reason is that z-nand is actually a 64-bit stacked SLC flash memory, and it should be MLC flash memory running in SLC mode. By SLC mode, the performance and durability can be enhanced. Samsung also cited the use of a unique circuit design, which USES shorter bitlines in flash memory packaging, to improve performance.


In the end, samsung also revealed that it will release a variety of MLC flash memory products in the future. The product has a slightly lower performance but larger capacity. Market expectations, the future of samsung SZ985 should be Intel Optane's strong competitor. In the current market condition, the 3D XPoint performance is good, but the price is high, the capacity is also limited. Samsung SZ985 should not worry about capacity. At present, we will wait for samsung to release the price and see if it can be accepted by consumers.


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