This article covers WD_BLACK 1TB SN850X NVMe 内蔵型ゲーミングSSD ソリッドステートドライブ.

Overview

The WD_BLACK SN850X 1TB NVMe SSD is a top-tier PCIe Gen4 internal drive from Western Digital, designed specifically for gamers who demand the fastest load times. With sequential read speeds up to 7,300MB/s, this M.2 2280 drive leverages the NVMe 1.4 protocol to deliver cutting-edge performance. The 1TB model (part number WDS100T2X0E) features a 600TBW endurance rating, making it suitable for heavy daily use. Its proprietary Game Mode 2.0 technology optimizes latency by predicting game workloads, resulting in smoother gameplay and reduced stuttering. In real-world testing, the SN850X shines in DirectStorage-enabled titles like Riftbreaker and Forspoken, where texture pop-in is virtually eliminated. It also shaves noticeable time off game loads and level transitions compared to SATA or even older PCIe 3.0 SSDs. For creative professionals handling large video files or 3D assets, the fast sequential writes (up to 6,300MB/s) can significantly cut down export times. Positioned as a high-end gaming SSD, the SN850X competes directly with the Samsung 990 Pro and Seagate FireCuda 530. It’s a favorite among PC builders for its consistency and reliability, though it’s worth noting that the standard model lacks a heatsink ??a detail we’ll cover later.

Compatibility Guide

Interface: PCIe 4.0 x4, NVMe 1.4. Fully backward compatible with PCIe 3.0 slots, but speed will be capped at ~3,500MB/s. Form Factor: M.2 2280 (80mm length). Fits most modern motherboards; check your board’s M.2 slot generation and keying (M-key required). Memory: Not applicable. The drive has its own 1GB LPDDR4 DRAM cache, independent of system memory. Power: Bus-powered via the M.2 slot; typical draw ~6W under load. No separate power cable needed. Storage Interface: NVMe only. Does not support SATA mode. Heatsink: The 1TB standard model does not include a heatsink. While many motherboards have built-in M.2 heatsinks, if yours doesn’t, consider adding one to prevent thermal throttling during sustained writes.

Product Info

Released in late 2022, the SN850X is still widely available as of August 2026. Pricing for the 1TB variant typically ranges from $150 to $180 USD, though it fluctuates. The drive comes with a 5-year limited warranty (valid until TBW is exceeded). You can purchase it from , Newegg, or Western Digital’s official store. The SN850X occupies the high-end bracket in the PCIe 4.0 SSD market. Its standout features are the 7,300MB/s read speed and Game Mode 2.0, which provides a genuine latency reduction in gaming scenarios. However, for most everyday users, a mid-range Gen4 drive like the WD Black SN770 offers similar real-world performance at a lower price.

Best Use Cases

Gamers (Esports and AAA Titles): If you play games that benefit from fast asset streaming, like Call of Duty, Cyberpunk 2077, or Starfield, this drive will noticeably reduce load times and eliminate stutter. However, for older or less demanding games, the difference may be negligible. Content Creators: Video editors working with 4K/8K footage, or 3D artists handling large textures, will appreciate the fast sequential reads and writes. The 1TB capacity is sufficient for active projects, but professionals may want the 2TB or 4TB versions for larger libraries. * System Builders Looking for a Fast Boot Drive: For a primary OS drive, the SN850X offers snappy boot times and responsive application launches. If you’re building a new high-end PC, this is a solid choice. But if you’re on a tight budget, consider a DRAM-less Gen4 SSD like the Crucial P3 Plus for about half the price.

Things to Consider

PCIe 4.0 Requirement: To get the full 7,300MB/s, you need a compatible CPU and motherboard (Intel 12th Gen+ or AMD Ryzen 3000+). In a PCIe 3.0 system, the drive will run at half speed, making it less cost-effective. If you’re not planning to upgrade soon, a PCIe 3.0 drive like the WD Blue SN570 is a better value. Overkill for Many Users: Most gamers won’t notice a significant difference between a high-end Gen4 SSD and a mid-range one. Load times are already fast on any NVMe drive. Only buy this if you have a specific need for maximum bandwidth, such as frequent large file transfers or DirectStorage gaming. Heatsink Required for Sustained Performance: Without a heatsink, the SN850X can reach 80°C under heavy write loads, triggering thermal throttling. If your motherboard lacks an M.2 heatsink, purchase one. Alternatively, the SN850X HS version includes a heatsink for a small premium. DRAM vs. DRAM-less: The built-in DRAM helps maintain consistent performance, especially when the drive is nearly full. DRAM-less alternatives (like the WD Black SN770) use HMB (Host Memory Buffer) and can slow down after prolonged writes. For OS and gaming, both work fine, but DRAM is better for heavy workloads. ## FAQ
Q: Can I use this SSD in a PCIe 3.0 motherboard? A: Yes, it will work, but speeds wil

Product Disclosure (Amazon)

  • Manufacturer: SanDisk
  • Seller: ショップスルー
  • Fulfilled by: Amazon
  • ASIN: B0B7CKVCCV
  • Note: This article covers a manufacturer-made product based on Amazon listing details.