SK hynix Starts Mass Production of Speedy, 238-Layer NAND

SK Hynix
(Image credit: SK Hynix)

SK hynix said late on Wednesday that it had begun mass production of its 238-layer "4D" (actually a form of 3D) NAND memory devices that promise to enable high-performance and high-capacity SSDs. The new chips boast a 2400 MT/s data transfer rate and could be used to power the next generation of best SSDs, high-speed models what will featuring a PCIe 5.0 x4 interfaces and offer sequential read/write speed of 12 GB/s and higher. 

From a performance PC enthusiast's point of view, the key advantage of SK hynix's 238-layer TLC NAND IC is its interface speed of 2400 MT/s. This represents a 50% increase over prior generation and is something that is needed to build SSDs with sequential read/write speeds of 12 GB/s and higher as 3D NAND devices with a 1600 MT/s interface cannot enable transfer rates to saturate a PCIe Gen5 x4 interface. 

Anton Shilov
Contributing Writer

Anton Shilov is a contributing writer at Tom’s Hardware. Over the past couple of decades, he has covered everything from CPUs and GPUs to supercomputers and from modern process technologies and latest fab tools to high-tech industry trends.

  • domih
    I'm no expert, but beyond size, sequential speed and reduced power consumption, one can wonder about latency, endurance, random I/O and how it will perform once integrated, depending on DRAM cache speed and size (and optional capacitor for flushing if power goes out), as well as driver brand and type. Finally, are we going to see 8, 10,12 or 16 TB SSD models at reasonable prices?
    Reply
  • atomicWAR
    domih said:
    Finally, are we going to see 8, 10,12 or 16 TB SSD models at reasonable prices?
    We can hope! I for one would love some larger capacity ssd drives at an affordable price.
    Reply
  • hydro01
    I thin
    atomicWAR said:
    We can hope! I for one would love some larger capacity ssd drives at an affordable price.
    I think this also depends on how Hynix is going to treat these nands. If they somehow limit these chips to PCIe 5.0 drives I don't think it will be cheap, as in the case of Micron's 232-layer nands. But if somebody else do pair those nand with an 4 channel HMB controller with 2400MT/s interface (like IG5220 and MAP1602, and TeneFe 2201 in future) then it's very possible to see cheap 4TB ssds at least, as in the case of YMTC 232-layer nands in China. The prices of 4TB MAP1602+YMTC 232-layer ssds are crazy there, as low as about $160 AFTER tax.
    Reply