Silicon Motion SM2508 PCIe 5.0 x4 NVMe SSD Controller Kit for Volume Production

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Silicon Motion SM2508 PCIe 5.0 x4 NVMe SSD Controller Kit for Volume Production

Silicon Motion has been promoting its SM2508 SSD controller at various trade shows for over a year. The controller is finally ready for mass production, just in time for the mainstream Gen 5 SSD market to take off. Silicon Motion expects SM2508-based SSDs to be available by the end of the year.

At FMS 2024, the company reused the same info cards we saw at Computex in June. The SM2508 specs from our Computex are reproduced here.

















Silicon Motion NVMe Client SSD Controller Comparison
SM2508 SM2264 SM2268XT2 SM2269XT
Segment of the market High class Mainstream
Production process 6nm 12nm 12nm 12nm
Processor cores 4x Cortex R8 4x Cortex R8 2x Cortex R8 2x Cortex R8
Error correction 4K+ LDPC 4K LDPC 4K+ LDPC 4K LDPC
THIMBLE DDR4 memory DDR4 memory NO NO
Host Interface PCIe 5.0 x4 PCIe 4.0 x4 PCIe 4.0 x4 PCIe 4.0 x4
NVMe version NVMe 2.0 NVMe 1.4 NVMe 2.0 NVMe 1.4
NAND Channels, Interface Speed 8 channels,
3600 tons/sec
8 channels,
1600 tons/sec
4 channels,
3600 tons/sec
4 channels,
1600 tons/sec
Sequential reading 14.5 GB/s 7.5 GB/s 7.4 GB/s 5.1 GB/s
Sequential write 14GB/s 7GB/s 6.7 GB/s 4.8 GB/s
4KB Random Read IOPS 2500 thousand 1300k 1200k 900k
4KB Random Write IOPS 2500 thousand 1200k 1200k 900k

Current Gen 5 SSDs in the consumer market are currently based on Phison’s E26 controller. The emergence of newer platform solutions for SSD vendors will certainly be beneficial from both an end-user pricing perspective and an adoption perspective.

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