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** Level 4 (L4) Shared cache – 128 MiB{{cn|reason=No source provided for IEC units, sources only use metric units like KB, MB, GB, etc|date=May 2021}}{{Original research inline|certain=y|date=May 2021}} in size. Best access speed is around 40 GB/s<ref name=sisd_qa_f_mem_hsw />
* [[Computer memory|Main memory]] ([[Primary storage]]) – [[GiB]]{{cn|reason=No source provided for IEC units, sources only use metric units like KB, MB, GB, etc|date=May 2021}}{{Original research inline|certain=y|date=May 2021}} in size. Best access speed is around 10 GB/s.<ref name=sisd_qa_f_mem_hsw /> In the case of a [[Non-Uniform Memory Access|NUMA]] machine, access times may not be uniform
* [[Disk storage]] ([[Secondary storage]]) – [[Terabyte]]s in size. As of 2017, best access speed is from a consumer [[Solid-state drive|solid state drive]] is about 2000 MB/s<ref>{{cite web|url=http://www.storagereview.com/samsung_960_pro_m2_nvme_ssd_review|title=Samsung 960 Pro M.2 NVMe SSD Review|date=20 October 2016 |publisher=storagereview.com|access-date=2017-04-13}}</ref>
* [[Nearline storage]] ([[Tertiary storage]]) – Up to [[exabytes]] in size. As of 2013, best access speed is about 160 MB/s<ref>{{cite web |url=http://www.lto.org/technology/generations.html |title=Ultrium - LTO Technology - Ultrium GenerationsLTO |publisher=Lto.org |access-date=2014-07-31 |url-status=dead |archive-url=https://web.archive.org/web/20110727052050/http://www.lto.org/technology/generations.html |archive-date=2011-07-27 }}</ref>
* [[Offline storage]]
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