WD_BLACK SN850X 是一款 PCIe Gen4、M.2 2280 NVMe SSD，提供 1TB、2TB、4TB 和 8TB 容量，并有带散热片与不带散热片的版本。西部数据公布的顺序读取上限为 7,200–7,300MB/s，具体取决于容量；这些是厂商规格，不是独立实测成绩。适不适合买，首先看主机是否支持 M.2 2280、是否需要 PS5 兼容的散热片版本，以及容量和预算是否合适。
先看结论：SN850X 适合什么需求？
如果你的电脑或主机具备兼容的 M.2 2280 M-key 插槽，并且希望购买 PCIe Gen4 NVMe SSD，SN850X 的规格覆盖了从 1TB 到 8TB 的多种容量。若用于 PS5，西部数据列出的兼容版本是带散热片款；若用于台式机或笔记本，则应先核对设备的插槽、散热方案和空间余量。
本文依据西部数据 2024 年 6 月发布的产品数据表说明规格和选购条件，不把厂商标称速度当成实测结论。没有可据以比较实际游戏载入、持续写入或温度表现的独立测试数据，因此不能据此判断它是否比其他 SSD 更快。
各容量规格有什么差别？
西部数据数据表列出的顺序速度、随机性能和耐久度如下。表内速度与 IOPS 均为厂商标称上限，不代表特定电脑中的实测结果。
#1 Best Overall
- This product has been replaced by our latest generation. Please search for the SANDISK Optimus GX PRO 850X NVMe SSD
- TRANFORM YOUR PC: Insane speeds up to 7,300MB/s (1TB - 4TB models) deliver top-tier performance with ridiculously short load times for your gaming PC or workstation — for the elite experience you’ve been waiting for.
- MORE ROOM FOR MORE GAMES: Capacities up to 8TB built with SANDISK TLC 3D NAND, means you get to keep more games at the ready — and get into the action even faster.
| 容量 | 顺序读取上限 | 顺序写入上限 | 随机读取上限 | 随机写入上限 | 耐久度 |
|---|---|---|---|---|---|
| 1TB | 7,300MB/s | 6,300MB/s | 800K IOPS | 1,100K IOPS | 600TBW |
| 2TB | 7,300MB/s | 6,600MB/s | 1,200K IOPS | 1,100K IOPS | 1,200TBW |
| 4TB | 7,300MB/s | 6,600MB/s | 1,200K IOPS | 1,100K IOPS | 2,400TBW |
| 8TB | 7,200MB/s | 6,600MB/s | 1,200K IOPS | 1,200K IOPS | 4,800TBW |
TBW 指厂商标定的总写入量耐久指标。SN850X 的标称耐久度随容量增加；保修期为五年或达到相应最大 TBW 限值时截止，以先发生者为准。具体保修适用条件应按购买地区和准确 SKU 核实。
带散热片还是不带散热片？
这不是只看散热偏好的选择：设备空间、原有散热方案以及 PS5 兼容性都可能决定版本。西部数据数据表只将带散热片款列为 PS5 兼容型号；其他主机或电脑则要确认散热片尺寸是否会与主板散热装甲、笔记本底盖或机箱空间冲突。不要假设所有 M.2 插槽或外置盒都能容纳带散热片版本。
Rank #2
- This product has been replaced by our latest generation. Please search for the SANDISK Optimus GX PRO 850X NVMe SSD
- TRANFORM YOUR PC: Insane speeds up to 7,300MB/s (1TB - 4TB models) deliver top-tier performance with ridiculously short load times for your gaming PC or workstation — for the elite experience you’ve been waiting for.
- 选择带散热片款：如果你要按西部数据列出的方案用于 PS5，或主机没有合适的散热解决方案，并且已确认安装空间足够。
- 选择不带散热片款：如果设备已有适配的 M.2 散热装甲，或空间要求更严格；安装前确认散热装甲和导热垫的使用方式。
- 不确定时：查主板、笔记本或主机厂商对 M.2 规格和散热器间隙的说明，再对照所选 SSD 版本尺寸。
电脑和 PS5 的兼容性要检查什么？
电脑主板或笔记本
SN850X 为 M.2 2280、M-key 接口，支持 PCIe Gen4、最多四条通道。西部数据也列出对 PCIe Gen3 x4/x2/x1 与 Gen2 x4/x2/x1 的向下兼容；但要达到 Gen4 规格，主板必须支持相应接口。厂商数据表原文指出：“PCIe® Gen4 存储技术需要兼容的主板。”较旧接口可以工作，但实际性能会受主机平台和使用条件影响。
PlayStation 5
西部数据列出的 PS5 兼容款为带散热片版本。购买前仍应核对 PS5 的安装要求、所选 SKU 和实际安装空间；“兼容”不等于任何第三方散热器或机箱配置都适用。
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Rank #3
- Officially licensed M.2 SSD for PlayStation 5 consoles[4] so you can easily install and play with no concern of compatibility. [4]For PlayStation 5 system software compatibility, please visit the official WD_BLACK site.
- With capacities ranging from 1TB to 4TB[1], your PS5 console has the additional space to store up to 200 games[3] (8TB model) [1]1GB = 1 billion bytes and 1TB = one trillion bytes. Actual user capacity may be less depending on operating environment. [3] Number of games based on a 36GB average per game. The number of games will vary based on file size, formatting, other programs, and factors.
- Experience uninterrupted gameplay with a brand-new, optimized heatsink designed especially for the PS5 console for an easy, worry-free installation into the M.2 slot.
- Play directly from the drive and eliminate the need to transfer or delete games from your console with tested and approved storage for your PS5 console[4].
- Push the envelope of PCIe Gen 4 technology with read speeds up to 7,300MB/s[2], giving you seamless gameplay and incredibly short load times. [2]1 MB/s = 1 million bytes per second. Based on internal testing; performance may vary depending upon host device, usage conditions, drive capacity, and other factors.
型号代码如何辨认？
数据表中的型号代码按容量和散热片版本区分：
| 容量 | 不带散热片 | 带散热片 |
|---|---|---|
| 1TB | WDS100T2X0E | WDS100T2XHE |
| 2TB | WDS200T2X0E | WDS200T2XHE |
| 4TB | WDS400T2X0E | WDS400T2XHE |
| 8TB | WDS800T2X0E | WDS800T2XHE |
下单时对照商品页面上的完整型号，不要只依据“SN850X”名称判断是否带散热片或容量。数据表来自西部数据，具体地区的保修条件仍应以当地销售和保修条款为准。
Rank #4
- This product has been replaced by our latest generation. Please search for the SANDISK Optimus GX 7100 NVMe SSD
- HIGH-OCTANE GAMING. Experience speeds up to 7,250MB/s read and 6,900MB/s write (1-2TB models), with up to 35% faster performance than previous generation.
- PURPOSE-BUILT. Designed for serious on-the-go gamers, with a PCIe Gen4 interface and SANDISK’s next generation TLC 3D NAND.
- MORE TIME TO CLEAR THAT CHECKPOINT. Built with laptops and handheld gaming devices in mind, with up to 100% more power efficiency over the previous generation.
- DO MORE WITH DASHBOARD. Ensure your drive is optimized for prime performance with the downloadable WD_BLACK Dashboard (Windows only).
标称速度、温度与软件功能该怎么理解？
顺序读取和写入数字是厂商公布的最高规格。西部数据说明，实际性能会因主机设备和使用条件而变化；没有公开的同一测试环境对比数据，不能从这些上限直接推断日常文件传输速度、游戏加载改善或与其他型号的排名。
数据表列出的工作温度范围为 0°C 至 85°C，并提醒 SSD 在系统内的温度读数高于环境温度是预期情况；包装额定温度最高为 60°C。这些标注不是某台设备中的实测温度，也不能替代主板或设备厂商的散热要求。
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Best Value
- This product has been replaced by our latest generation. Please search for the SANDISK Optimus GX 7100 NVMe SSD
- HIGH-OCTANE GAMING. Experience speeds up to 7,250MB/s read and 6,900MB/s write (1-2TB models), with up to 35% faster performance than previous generation.
- PURPOSE-BUILT. Designed for serious on-the-go gamers, with a PCIe Gen4 interface and SANDISK’s next generation TLC 3D NAND.
- MORE TIME TO CLEAR THAT CHECKPOINT. Built with laptops and handheld gaming devices in mind, with up to 100% more power efficiency over the previous generation.
- DO MORE WITH DASHBOARD. Ensure your drive is optimized for prime performance with the downloadable WD_BLACK Dashboard (Windows only).
WD_BLACK Dashboard 为 Windows 专用。西部数据称该软件可监控硬盘健康状态、控制 RGB，并启用 SN850X 的 Game Mode 2.0。数据表提及 DirectStorage 支持，但没有提供对比测试结果，因此不能据此声称开启后会带来特定幅度的游戏载入提升。
购买前核对清单
- 设备是否有 M.2 2280、M-key NVMe 插槽。
- 主板支持的 PCIe 代际和通道数；Gen4 速度需要兼容主机。
- 实际容量需求，以及对应型号的 TBW 和五年或 TBW 上限保修条件。
- 是否需要 PS5 兼容方案；西部数据列出的 PS5 款为带散热片版本。
- 散热片与主板、笔记本、机箱或外置盒的空间是否匹配。
- 商品页面的完整 SKU、销售地区和保修细则是否与预期一致。
规格来源：西部数据《WD_BLACK SN850X NVMe SSD 数据表》，2024 年 6 月。查看官方数据表。
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