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Ruiyu SSD Master Control can reduce DRAM cache by 75% without PCIe 4.0 Master Control

via:快科技     time:2019/5/31 19:39:38     readed:460

Japan's PCwatch website reported that Realtek Ruiyu (commonly known as Little Crab) launched RTS5762 master during the Taipei Computer Exhibition. Before that, they launched two PCIe masters, RTS5760 and RTS5761, but they used 55nm technology, which had high calorific value, resulting in low frequency and performance of less than 1200MB/s, while RTS5762 master upgraded to 28nm technology with higher frequency, so the speed also increased to 35. 00MB/s.

In addition, Ruiyu RTS5762 master control also has a unique trick, that is, dramatically reduce the DRAM cache demand. Previous DRAM caching configuration standards are generallySSDHard disk capacity of 1/1000, 512GB hard disk is generally equipped with 512MB DDR3 or more expensive DR4 cache, 1TB version will need 1GB cache.

Ruiyu RTS5762 master reduces this requirement from 1/1000 to 1/4000, that is to say, it reduces the demand for DRAM cache by 75%. Now only 256MB is needed for 1GB, and 128MB is needed for 512GB SSD hard disk, which greatly reduces the cost.

After reducing costs, the performance will remain basically unchanged. According to Ruiyu's display, the reading speed is still maintained at 3500 MB/s and the writing speed is also 3000 MB/s, which is similar to the usual high-performance PCIe 3.0 X4 hard disk.

In addition to the high-performance RTS5762 master control, Ruiyu has not abandoned the low-end SATA master control, introduced RTS5733DMQ master control, integrated DRAM cache itself, SSD manufacturers do not need to purchase DRAM cache, reading speed can reach 550MB/s, writing speed can reach 520MB/s, random reading and writing are 90K, 80K IOPS, respectively.

瑞昱SSD主控可减少75%的DRAM缓存

For the current hot PCIe 4.0 master control, Ruiyu's attitude is more conservative, said that it will not develop PCIe 4.0 master control for the time being, they have to wait until the market trend and demand is mature.

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