This article covers WDS500G2B0C [WD Blue SN550 NVMe SSD（500GB M.2(2280) PCIe Gen3 x4 NVMe 300TBW 5年保証）].

Overview

The Western Digital WD Blue SN550 NVMe SSD (model WDS500G2B0C) is a 500GB internal solid-state drive in the M.2 2280 form factor. It utilizes the PCIe Gen3 x4 interface with NVMe 1.3 protocol, delivering sequential read speeds up to 2400 MB/s and sequential write speeds up to 1750 MB/s. Despite being DRAM-less, it employs Host Memory Buffer (HMB) technology to maintain responsive performance for everyday computing and gaming. Positioned as an entry-to-mid-range NVMe SSD, it offers excellent value for budget-conscious builders and upgraders.

Compatibility Guide

This drive fits any M.2 2280 socket with an M-key, requiring a motherboard that supports PCIe Gen3 x4 NVMe. It is compatible with most modern desktops and laptops, but ensure your system BIOS supports NVMe boot if you plan to use it as the primary drive. It works well with Intel chipsets from B460/H410 onward and AMD chipsets from B450/B550/X570 onward. If installed in a PCIe Gen2 x2 slot, performance will be limited to Gen2 speeds.

Product Info

Launched in 2019, the WD Blue SN550 series has become a staple in the entry-to-mid-range NVMe market. The 500GB variant carries a 300TB total bytes written (TBW) rating and a 5-year limited warranty. It uses Western Digital's own 64-layer 3D TLC NAND flash and a SanDisk 20-82-00731 controller (DRAM-less with HMB). Power consumption is very low, with idle consumption around 0.1W and active load under 5W, resulting in minimal heat output. Competitors include the Samsung 980 and Crucial P3, but the SN550 stands out for its proven reliability and consistent performance.

Best Use Cases

Upgrading from HDD or SATA SSD: The NVMe interface provides a noticeable speed boost for boot times and application loading. Gaming drive: 500GB is sufficient for the operating system and several modern games, reducing load times significantly. Laptop storage upgrade: Low power draw and slim M.2 2280 form factor make it ideal for many notebooks without overheating issues. Secondary drive: Pair with a larger HDD for bulk storage, using the SN550 as a fast OS and application drive.

Things to Consider

The DRAM-less design means that heavy random write workloads (e.g., database servers, video editing scratch disks) may see performance degradation compared to DRAM-equipped SSDs. For typical desktop use and gaming, this is not a concern. If you anticipate sustained heavy writes, consider the WD Black SN750 or SN850 series. Additionally, while 500GB is ample for OS and essential software, users with large game libraries may prefer the 1TB version. Note that this is a PCIe Gen3 drive; installing it in a Gen4 slot will not exceed Gen3 speeds, so if you plan to upgrade to a Gen4 platform soon, you might want to invest in a Gen4 SSD directly.

Product Disclosure (Amazon)

  • Manufacturer: ウエスタンデジタル(Western Digital)
  • Seller: ウエストモール
  • Fulfilled by: Amazon
  • ASIN: B07YFF3JCN
  • Note: This article covers a manufacturer-made product based on Amazon listing details.