Quad-level cell (QLC) flash memory, or QLC SSD (solid-state drive), is a capacity-optimized NAND memory technology that delivers a per-terabyte cost that matches or beats hard-disk drives (HDDs). As its name suggests, QLC SSDs store four bits per cell, delivering NVMe performance with higher capacities.

Intel® QLC 3D NAND SSDs can help reduce storage costs through consolidation, while providing the reliability and low-latency performance needed for common, read-heavy workloads.

2024年10月22日 · Durability concerns: QLC NAND generally has a lower Program/Erase (PE) cycle, resulting in fewer Daily Writes Per Drive (DWPD), which shortens the SSD's lifespan. To address these issues, Silicon Motion has adopted Flexible Data Placement (FDP) as a key solution to improve both performance and durability in QLC SSDs.

QLC drives work great for their intended purpose—ie, as low-cost drives to replace HDDs in read-heavy workloads. Sometimes their peak performance can rival that of even high-end TLC-based drives, depending on the manufacturer, but their performance in steady-state situations still …

QLC (Quad-Level Cell) and TLC (Triple-Layer Cell) are two types of flash memory SSDs (solid state drives), and each has its own strengths.

2021年8月11日 · The next step in SSD technology is QLC - four bit layers per cell, for 16 possible binary values. That’s allows for another astonishing increase in capacity and reduction in cost.

2023年10月31日 · The new NAND research shows that optimizing the cell stack leads to an expansion of the PE window, while the QLC operation was also demonstrated which suggests that 3D Fe-NAND is a promising potential solution in the post-3D NAND era.

With Solidigm QLC SSDs delivering 3,000 program/erase (PE) cycles on massive capacities, available lifetime writes (in petabytes written [PBW]) can exceed TLC SSDs. Even more important than PBW is the reality of endurance needs.

Solidigm QLC 3D SSDs: Unlocking the Value of Stored Data Like TLC SSDs, QLC SSDs can saturate the PCIe 4.0 bus on the read side and deliver near-TLC-like latency and quality of service (QoS).

2017年7月5日 · qlc相比tlc可以做到更大的容量，由于有16个状态，相应寿命会降低，但是东芝已经声称目前他们的qlc可以做到1000次pe，跟tlc同一水平。 现在东芝的TLC闪存Die容量是512Gb（64GB），而QLC的Die容量可以提升50%达到768Gb（96GB），配合东芝的16 Die堆栈技术可以做出单颗1.5TB ...