This article covers WD_BLACK 1TB SN850 NVMe 内蔵型ゲーミングSSD ソリッドステートドライブ ヒートシンク付き Playstation 5に対応 Gen4 PCIe M.2 2280 最高7.

Overview

Western Digital's WD_BLACK brand has long been synonymous with high-performance gaming storage, and the SN850 series represents the pinnacle of their Gen4 NVMe lineup. The 1TB model with heatsink delivers sequential read speeds up to 7,000MB/s and write speeds up to 5,300MB/s, making it one of the fastest consumer SSDs on the market. This performance translates directly into dramatically reduced game load times, faster level transitions, and snappier system responsiveness. What sets this particular SKU apart is the integrated heatsink, which is pre-installed at the factory. This isn't just a cosmetic addition — it actively prevents thermal throttling during sustained heavy workloads, ensuring consistent performance whether you're copying large files or playing the latest AAA titles. The drive is also officially validated for use with the PlayStation 5, making it a hassle-free upgrade for console gamers looking to expand their storage. Positioned firmly in the high-end segment, the SN850 competes directly with Samsung's 980 Pro and Seagate's FireCuda 530. It's a clear choice for enthusiasts who demand the absolute best in storage performance and are willing to pay a premium for it.

Compatibility Guide

The drive uses the PCIe Gen4 x4 NVMe 1.4 interface and comes in the standard M.2 2280 form factor. It will physically fit in any desktop or laptop that has an M.2 slot, provided there is enough clearance for the heatsink. The heatsink adds approximately 23.4mm of height. This can be problematic in slim laptops or in desktop builds where the M.2 slot is located directly under a large graphics card. Always check your motherboard's M.2 clearance specifications before purchasing. For PlayStation 5 installation, the console must be running system software version 21.02-04.00.00 or later. The heatsink is designed to fit within the PS5's expansion slot cover without any interference. If installed in a PCIe Gen3 system (e.g., Intel Z390 or AMD B450 chipset), the drive will operate at Gen3 speeds (up to ~3,500MB/s). It will still be very fast, but you won't see the full 7,000MB/s potential until you upgrade to a Gen4-capable platform.

Product Info

Released in November 2020, the WD_BLACK SN850 1TB with heatsink carries a manufacturer's suggested retail price that has gradually decreased over time. At the time of writing, it is available for around ¥57,000 on Japan. The drive comes with a 5-year limited warranty, which is standard for high-end NVMe SSDs. This is unequivocally a high-tier product. The 7,000MB/s sequential read speed places it at the ceiling of what PCIe Gen4 can offer. It uses Western Digital's in-house 20-82-10034-A1 controller, paired with a DRAM cache (LPDDR4) and BiCS4 96-layer 3D TLC NAND flash. The combination ensures low latency and high queue-depth performance.

Best Use Cases

PC Gamers: If you play modern AAA titles like Starfield, Cyberpunk 2077, or Call of Duty: Modern Warfare II, this drive will cut load times by 50-70% compared to a SATA SSD. It's also ideal for DirectStorage-ready games that can stream assets directly from the SSD. However, if you primarily play lightweight indie or esports titles, you likely won't notice a difference over a good Gen3 drive. PlayStation 5 Owners: This is one of the easiest PS5 storage upgrades you can buy. The pre-installed heatsink means no extra parts or thermal pads are needed — just plug it into the expansion slot and format it. The drive meets Sony's recommended 5,500MB/s read speed requirement with room to spare. Not suitable for PS4 or PS4 Pro consoles. Content Creators: Video editors working with 4K or 8K footage, 3D artists, and photographers handling large RAW files will benefit from the SN850's high sequential throughput. It excels as a scratch disk or active project drive. For pure archival storage, a large HDD or QLC SSD would be more cost-effective. System Builders: If you're building a new high-end PC with a Gen4-capable motherboard (AMD X570/B550 or Intel Z590/Z690 and newer), this drive is a natural choice for your primary OS and game library. It's overkill for a budget office PC or a home theater PC. ## Alternatives
Samsung 980 Pro 1TB: Nearly identical performance (7,000MB/s read, 5,000MB/s write) at a similar price point. The 980 Pro is slightly more power-efficient and has marginally better random read performance in some benchmarks. However, it does not include a heatsink, so you'll need to buy one separately for PS5 use. Choose the 980 Pro if you need a thinner drive for a laptop or want to use your own aftermarket heatsink. Seagate FireCuda 530 1TB: Slightly faster sequential speeds (7,300MB/s read, 6,000MB/s write) and significantly higher endurance (1,275 TBW vs. 600 TBW). It also comes with a heatsink option. The FireCuda 530 is generally more expensive. Choose it if maximum durability

Product Disclosure (Amazon)

  • Manufacturer: ウエスタンデジタル(Western Digital)
  • Seller: Amazon US
  • Fulfilled by: Amazon US
  • ASIN: B08PHSVW7K
  • Note: This article covers a manufacturer-made product based on Amazon listing details.