This article covers Western Digital ウエスタンデジタル 内蔵SSD 250GB WD Blue SN550 (読取り最大 2.

Overview

The Western Digital WD Blue SN550 is an entry-level NVMe SSD that offers a significant performance boost over SATA drives. The 250GB model (WDS250G2B0C-EC) delivers sequential read speeds of up to 2,400MB/s, approximately four times faster than typical SATA SSDs. Write speeds top out at 950MB/s, which is modest for NVMe but sufficient for everyday tasks and light gaming. With a 5-year warranty and competitive pricing, the SN550 series has become a popular choice for budget-conscious builders looking to upgrade from SATA.

Compatibility Guide

The SN550 uses the M.2 2280 form factor and connects via PCIe Gen3 x4 with the NVMe protocol. It is compatible with any motherboard that has an M.2 slot supporting NVMe. Some older boards may have SATA-only M.2 slots, so check your motherboard manual. No additional power cables are required; the SSD draws power directly from the M.2 slot. Ensure your BIOS is set to UEFI mode and NVMe is enabled for booting.

Product Info

First released around 2020, the WD Blue SN550 250GB sits in the entry-to-mid range of NVMe SSDs. Its market positioning is aimed at users upgrading from SATA SSDs who want NVMe speed without spending a lot. The 250GB model typically retails for around ¥8,000 in Japan (as of 2026). The 5-year warranty provides peace of mind. Heat output is low, so an additional heatsink is generally not required.

Best Use Cases

  • Light users and office workers: For web browsing, document editing, and email, this SSD offers a snappy experience. Upgrading from a SATA SSD will bring noticeable improvements. However, if you frequently move large files, the write speed may feel slow. - Budget DIY PC builders: If you're building your first PC and want to keep costs down, this SSD gives you NVMe performance at a low price. But for gaming, consider at least 500GB. - Secondary PC or home server: Use it as a boot drive for a secondary machine or a NAS. Low power consumption and minimal heat make it ideal for compact builds.

Things to Consider

The 250GB capacity is enough for the OS and a few applications, but it fills up quickly if you install multiple modern games. The write speed of 950MB/s is lower than newer models like the SN570, so it's not ideal for heavy write workloads. Additionally, this SSD is DRAM-less, which can cause performance drops during sustained writes. At the same price, you could get a 500GB SATA SSD, but the random access speed of NVMe is superior. ## FAQ
Q: Can I use this SSD in my PS5? A: The PS5 requires a PCIe Gen4 SSD for internal expansion. The SN550 is Gen3, so it does not meet the official speed recommendation. It can be used as an external USB drive, but not for internal game storage. Q: Does it need a heatsink? A: No, the SN550 runs cool enough for most desktop environments. However, in poorly ventilated cases or laptops, heat buildup could be a concern. Q: How does it compare to the 500GB or 1TB models? A: The controller and performance characteristics are similar across the capacities. Larger capacities typically have slightly higher write speeds. The 250GB model is the most affordable but offers the lowest write performance.

Product Disclosure (Amazon)

  • Manufacturer: ウエスタンデジタル(Western Digital)
  • ASIN: B082VZVBXY
  • Note: This article covers a manufacturer-made product based on Amazon listing details.