{"id":650,"date":"2026-04-08T00:00:00","date_gmt":"2026-04-08T00:00:00","guid":{"rendered":"http:\/\/localhost:8080\/begin-supply-321-layer-qlc-nand-cssd\/"},"modified":"2026-06-17T04:12:39","modified_gmt":"2026-06-17T04:12:39","slug":"begin-supply-321-layer-qlc-nand-cssd","status":"publish","type":"post","link":"https:\/\/news.skhynix.com\/en\/begin-supply-321-layer-qlc-nand-cssd\/","title":{"rendered":"SK hynix Begins Supply of 321-layer QLC NAND cSSD, Reinforcing AI PC Storage Leadership"},"content":{"rendered":"<div class=\"post-intro\"><strong>\u00b7 Completes development of next-generation storage solution combining the company\u2019s first 321-layer QLC technology<br \/>\n\u00b7 Delivers high-capacity, high-performance, and low-power characteristics in a two-product lineup of 1TB (Terabyte) and 2TB, expanding customer options<br \/>\n\u00b7 Begins supply to Dell Technologies in April 2026, accelerating global customer expansion and QLC cSSD market share growth<\/strong><\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-648\" src=\"https:\/\/d18r0a86za96sg.cloudfront.net\/wp-content\/uploads\/2026\/05\/26155659\/QPC21_02.jpg\" alt=\"\" width=\"1000\" height=\"562\" srcset=\"https:\/\/d18r0a86za96sg.cloudfront.net\/wp-content\/uploads\/2026\/05\/26155659\/QPC21_02.jpg 1000w, https:\/\/d18r0a86za96sg.cloudfront.net\/wp-content\/uploads\/2026\/05\/26155659\/QPC21_02-300x169.jpg 300w, https:\/\/d18r0a86za96sg.cloudfront.net\/wp-content\/uploads\/2026\/05\/26155659\/QPC21_02-768x432.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>SK hynix is reinforcing its leadership in the global memory market by introducing a next-generation high-performance storage solution designed for the AI PC era.<\/p>\n<p>The company announced on April 8 that it has begun supplying its latest cSSD, PQC21, \u2013 the first product featuring 321-layer QLC<sup style=\"color: #ff0000;\">* <\/sup> NAND flash technology.<br \/>\nThe next-gen storage solution delivers high capacity, performance, and power efficiency, meeting the rising demand for efficient storage in in AI PC environments.<\/p>\n<p class=\"footnote\"><sup style=\"color: #ff0000;\">* <\/sup>QLC (Quad-Level Cell): A type of memory cell used in NAND flash that stores four bits of data in a single cell. NAND flash is categorized as single-level cell (SLC, 1 bit), multi-level cell (MLC, 2 bits), triple-level cell (TLC, 3 bits), quadruple-level cell (QLC, 4 bits), and penta-level cell (PLC, 5 bits) depending on how many data bits can be stored in one cell. As the amount of information storage increases, more data can be stored in the same volume.<\/p>\n<p>At the core of the product is the combination of high-layer stacking (321 layers) and QLC technology. By leveraging the strength of QLC, which stores four bits per cell, the product maximizes storage capacity per unit area. The product is available in two capacities \u2014 1TB (Terabyte) and 2TB \u2014 providing customers with a broader range of options.<\/p>\n<p>In addition, SLC caching<sup style=\"color: #ff0000;\">* <\/sup> technology has been applied to support fast read and write performance for frequently accessed data.<\/p>\n<p class=\"footnote\"><sup style=\"color: #ff0000;\">* <\/sup>SLC Caching: A technology that adjusts the number of bits stored per cell in NAND flash to utilize a portion of the storage area as SLC. By first writing data quickly in SLC mode and then re-storing it in the original format, this technology enhances write performance in particular.<\/p>\n<p>Starting in April, SK hynix will begin full-scale supply of the product to Dell Technologies, with plans to continuously expand partnerships with other major global customers.<\/p>\n<p>Driven by this supply momentum, the company aims to secure a leading position in storage for the next-generation AI PC market and expand its market share in QLC-based cSSDs.<\/p>\n<p>\u201cThe supply of the 321-layer QLC-based cSSD marks an important milestone that demonstrates our leadership in the AI PC market,\u201d said an SK hynix official. \u201cWe will continue to lead the high-performance NAND solution market on the strength of our overwhelming technological capabilities.\u201d Meanwhile, according to IDC, a global market research firm, the share of QLC NAND in the global cSSD market is expected to grow significantly from 22% in 2025 to 61% in 2027.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-649\" src=\"https:\/\/d18r0a86za96sg.cloudfront.net\/wp-content\/uploads\/2026\/05\/26155711\/QPC21_01-1.jpg\" alt=\"\" width=\"1000\" height=\"562\" srcset=\"https:\/\/d18r0a86za96sg.cloudfront.net\/wp-content\/uploads\/2026\/05\/26155711\/QPC21_01-1.jpg 1000w, https:\/\/d18r0a86za96sg.cloudfront.net\/wp-content\/uploads\/2026\/05\/26155711\/QPC21_01-1-300x169.jpg 300w, https:\/\/d18r0a86za96sg.cloudfront.net\/wp-content\/uploads\/2026\/05\/26155711\/QPC21_01-1-768x432.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<p>\u00a0<\/p>\n<div>\n<p><iframe loading=\"lazy\" title=\"SK hynix Begins Supply of 321-layer QLC NAND cSSD, Reinforcing AI PC Storage Leadership\" width=\"580\" height=\"326\" src=\"https:\/\/www.youtube.com\/embed\/wvxoHiA_QNc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>SK hynix is reinforcing its leadership in the global memory market by introducing a next-generation high-performance storage solution designed for the AI PC era. The company announced on April 8 that it has begun supplying its latest cSSD, PQC21, \u2013 the first product featuring 321-layer QLC1 NAND flash technology. The next-gen storage solution delivers high [\u2026]<\/p>\n","protected":false},"author":23,"featured_media":647,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_migrated_source_id":22793,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[5],"tags":[1298,12,64,1299,92],"class_list":["post-650","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech-and-ai","tag-321-layer-4d-nand","tag-ai","tag-nand-flash","tag-pqc21","tag-qlc","series-global-ai-company-nand"],"acf":[],"_links":{"self":[{"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/posts\/650","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/comments?post=650"}],"version-history":[{"count":6,"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/posts\/650\/revisions"}],"predecessor-version":[{"id":9757,"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/posts\/650\/revisions\/9757"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/media\/647"}],"wp:attachment":[{"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/media?parent=650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/categories?post=650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news.skhynix.com\/en\/wp-json\/wp\/v2\/tags?post=650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}