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Kioxia's new 61.44TB SSD uses surprising tech that almost doubles write performance compared to previous gen
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Kioxia's new 61.44TB SSD uses surprising tech that almost doubles write performance compared to previous gen
Wayne Williams
23 May 2025
CM9 PCIe 5.0 NVMe SSDs are sampling to select customers now
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(Image credit: Kioxia)
Kioxia CM9 Series SSDs use 8th gen BiCS FLASH for enterprise performance
Faster NAND speeds and power efficiency support AI and data centers
Offers 61.44TB max, dual-port design, and massive write improvements
Kioxia has announced its CM9 Series PCIe 5.0 NVMe SSDs, marking the first enterprise drives built using its 8th generation BiCS FLASH 3D TLC memory.
With PCIe 5.0 and NVMe 2.0 support, the CM9 SSDs are designed to meet modern standards for data center storage by offering high-efficiency storage capable of supporting AI, machine learning, and high-performance computing.
These new SSDs feature CMOS directly bonded to array (CBA) architecture, an update designed to improve performance, power efficiency, and memory density. Kioxia’s use of CBA-based flash architecture promises faster NAND interface speeds and lower latency, which helps the drives deliver quicker data access and improved power efficiency.
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Kioxia has unveiled a massive 122.88TB 2.5-inch SSD with PCIe Gen5 interface
Innodisk targets AI and big data with new PCIe Gen5 SSD offering 128TB capacity
Cheap(er) 15.36TB PCIe Gen 5 SSDs on the way as Adata launches new enterprise brand, but don't expect these to fit your PC case
Top-tier bit density
Compared to the previous CM7 series, the CM9 line shows increases of about 65% in random write speeds, 55% in random read, and 95% in sequential write speeds.
The CM9 SSDs, currently sampling to select customers, are built to handle read-intensive and mixed-use workloads in enterprise data centers and offer capacities of up to 61.44TB in 2.5-inch form and 30.72TB in E3.S configurations.
The drives are compatible with both the NVMe-MI 1.2c and OCP Datacenter NVMe SSD 2.5 specifications, and support dual-port configurations, making them suitable for enterprise environments where reliability and continuous access are critical.
Kioxia, which recently helped Linus Tech Tips smash the Pi calculation world record, says gains in power efficiency include roughly 55% better sequential read and 75% better sequential write performance per watt.
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Although it’s early in the lifecycle of the CM9 Series, the specs and performance numbers suggest the company is aiming to strengthen its position in high-performance enterprise storage.
Axel Stoermann, Vice President and CTO for Embedded Memory and SSD, Kioxia Europe GmbH, said, “Alongside processing power and energy efficiency, memory is fundamental to enable AI, machine learning, and high-performance computing applications. The CM9 Series powered by our BiCS FLASH generation 8, is designed to address these storage demands, providing top-tier bit density, rapid data transfer, and outstanding power efficiency, all of which contribute to the superior performance of our SSDs."
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Wayne Williams
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Wayne Williams is a freelancer writing news for TechRadar Pro. He has been writing about computers, technology, and the web for 30 years. In that time he wrote for most of the UK’s PC magazines, and launched, edited and published a number of them too.
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Kioxia has unveiled a massive 122.88TB 2.5-inch SSD with PCIe Gen5 interface
Innodisk targets AI and big data with new PCIe Gen5 SSD offering 128TB capacity
Cheap(er) 15.36TB PCIe Gen 5 SSDs on the way as Adata launches new enterprise brand, but don't expect these to fit your PC case
More 128TB SSDs on the way, but they won't be cheaper: Key maker of NAND flash controllers says 128TB SSDs are shipping
This SSD just smashed the 15 GBps speed barrier to become the fastest ever tested, but you won't be able to run it on a normal PC
World's first 122.88TB SSD gets 'reviewed' with two very odd bedfellows
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