New On sale 16%

Western Digital Black SN850X 1TB PCIe 4.0 x4 NVMe M.2 2280

★★★★★ 4.8 (19,447)

The 7300 MB/s read and 6300 MB/s write speeds, paired with 800K random read IOPS, deliver near-instant load times for AAA titles. The optional heatsink maintains peak performance during long sessions, while the Gaming Mode 2.0 preloads resources for smoother gameplay. Best for PC gamers upgrading from older SATA drives who want a high-capacity, low-latency drive for modern game libraries.

Capacity 1TB
Form Factor M.2 2280
Interface PCIe 4.0 x4
Read Speed 7,300 MB/s
NAND TLC
DRAM Cache Yes
Endurance 600 TBW
Western Digital Black SN850X 1TB PCIe 4.0 x4 NVMe M.2 2280 ssd
87 Overall Score
Also available in:

Snapshot

The 30-Second Version

The WD_BLACK SN850X 1TB is a top-tier Gen4 SSD with 7,300 MB/s reads and excellent real-world reliability. It's not the cheapest, but it's one of the safest picks for gamers and upgraders. Buy it when you find a good price, especially in EUR or CAD where the spread is wide.

Pros & Cons

Pros

  • Blazing fast sequential and random speeds 95th
  • DRAM cache keeps performance steady 93rd
  • Heatsink included for better thermals 89th
  • Excellent reliability track record with buyers 88th

Cons

  • Not the cheapest 1TB Gen4 drive
  • Capacity is just average for the price
  • 3-year warranty is shorter than some rivals
  • Portable use is a weak spot

What owners think

The Word on the Street

4.8/5 (19447 reviews)
👍 Many owners report benchmark speeds very close to the advertised numbers, with stable performance over months of use.
👍 Buyers frequently praise the drive's reliability and ease of installation in both desktops and laptops.
🤔 A few customers mention confusion with third-party sellers mislabeling capacities, so buying from authorized retailers is advised.

How owner sentiment changed over time

Exclusive

Based on when customers actually wrote their reviews - so you can see whether early praise held up.

Owner sentiment has held steady over time
1★2★3★4★5★Q4 '22: 5.0★ · 1 reviewQ1 '23: 5.0★ · 3 reviewsQ2 '23: 5.0★ · 3 reviewsQ3 '23: 4.5★ · 4 reviewsQ4 '23: 5.0★ · 1 reviewQ1 '24: 5.0★ · 1 reviewQ1 '25: 4.0★ · 2 reviewsQ2 '26: 5.0★ · 6 reviews13341126Q4 '22Q1 '23Q2 '23Q3 '23Q4 '23Q1 '24Q1 '25Q2 '26
Avg ratingHappy (4-5★)Unhappy (1-2★)Bar height = number of reviews
  1. Q2 202696/1005.0★6 reviews

    Buyers in Q2 2026 praised the SSD's exceptional speed, easy installation, and great value, noting significant performance boosts in laptops and desktops. One mentioned needing a separate heatsink.

    • Exceptional read/write speeds, with one user exceeding PCIe 3.0 limits and noting gen 4 performance.
    • Easy installation and immediate system recognition, with one user noting it was ready in minutes.
    • Excellent value for money, with multiple users highlighting it as the best price-to-performance SSD.
    • One user recommends buying a heatsink separately, as stores may not carry them, implying potential thermal concerns.
  2. Q3 202380/1004.5★4 reviews

    Buyers praised helpful staff at Cambridge and a sales rep's assistance, plus good value for PS5 storage. One found it pricey and not noticeably faster, but overall sentiment is positive.

    • Staff at Cambridge and sales rep Manny were knowledgeable and helpful, enhancing the buying experience.
    • Good value for PS5 storage, with quality build and brand trust.
    • One buyer felt it was expensive for the performance, not noticeably faster than alternatives.
  3. Q2 2023100/1005.0★3 reviews

    Buyers in Q2 2023 praised the NVMe SSD for its speed, noting it feels faster than traditional SSDs and works well in PS5. One buyer mentioned firmware updates and monitoring for potential issues.

    • Speed is a standout, with one buyer noting it feels blazing fast compared to traditional SSDs.
    • Compatibility with PS5 is praised, with one buyer calling installation excellent.
    • One buyer expressed concern about scattered reports of issues but hoped firmware updates would mitigate them.
  4. Q1 202395/1005.0★3 reviews

    Buyers in Q1 2023 praised the WD Black SN850X as a fast, stable, and reliable alternative to Samsung and Solidigm drives, highlighting its value and suitability for PS5.

    • Fast and stable performance, with no drive health issues reported.
    • Better value than competitors like Samsung 980/990 and Solidigm P44 Pro.
    • Recommended for PS5 use, especially when on sale.

Based on 21 dated customer reviews, grouped by calendar quarter. Period analysis is in English.

The proof

Performance

Sequential reads hit 7,300 MB/s and writes 6,300 MB/s, which puts it near the top of the Gen4 class. Random performance is even more impressive, 800K read IOPS and 1,100K write IOPS, so game loads and file transfers feel snappy. The DRAM cache keeps things consistent under pressure, and the heatsink helps with thermals during long sessions. One owner benchmarked 7,133 MB/s reads in performance mode, so the real-world gap from spec is tiny. Endurance sits at 600 TBW, which is solid for a 1TB drive, though not class-leading.

Performance Percentiles

Speed 85.9
Random 93.2
Feature 89.4
Capacity 55.4
Endurance 88.1
Social Proof 95.3
Affordability 45.4

Specifications

Full Specifications

Drive

Capacity 1000
Form Factor M.2 2280
Interface PCIe 4.0 x4
Protocol NVMe
PCIe Generation 4
External No

Performance

Sequential Read (MB/s) 7300
Sequential Write (MB/s) 6300
Random Read (IOPS) 800000
Random Write (IOPS) 1100000

Hardware

NAND TLC
DRAM Cache Yes

Reliability

Endurance (TBW) 600
MTBF (hours) 1750000
Warranty (years) 5

Features

Heatsink No
Hardware Encryption No

vs Competition

The Samsung 990 PRO is the obvious rival, and it trades blows with the SN850X on speed while sometimes costing a bit more. The Crucial T500 and Kingston Fury Renegade are also strong Gen4 options, often priced more aggressively. The Micron T710 and Lexar NM1090 PRO are newer challengers with big numbers, but they don't have the same volume of positive buyer feedback yet. The SN850X wins on trust and consistency, even if it's not always the fastest on paper anymore.

Spec Western Digital Black SN850X Samsung 9100 PRO Kingston FURY Renegade SFYRDK/4000G Micron T710 CT4000T710SSD5 Crucial T500 SanDisk WD_BLACK WDS400T1X0M
Capacity 1TB 4TB 4TB 4TB 2TB 4TB
Form Factor M.2 2280 M.2 2280 M.2 2280 M.2 2280 M.2 2280 M.2 2280
Interface PCIe 4.0 x4 PCIe 5.0 x4 PCIe 4.0 PCIe 5.0 PCIe 4.0 x4 PCIe 5.0
Seq Read 7,300 MB/s 14,800 MB/s 7,300 MB/s 14,500 MB/s 7,400 MB/s 14,900 MB/s
Nand Type TLC TLC TLC TLC TLC TLC
Dram Cache true true true false true true
Endurance 600 TBW 2400 TBW 4000 TBW 2400 TBW 1200 TBW 2400 TBW
Compare Compare Compare Compare Compare
Product SpeedRandomFeatureCapacityEnduranceSocial ProofAffordability
Western Digital Black SN850X 85.993.289.455.488.195.345.4
Samsung 9100 PRO Compare 99.299.899.792.68699.65.1
Kingston FURY Renegade SFYRDK/4000G Compare 93.394.493.992.694.195.39
Micron T710 CT4000T710SSD5 Compare 99.199.289.492.68677.411.3
Crucial T500 Compare 9496.998.978.58395.319.5
SanDisk WD_BLACK WDS400T1X0M Compare 99.699.699.792.681458.1

Price

Value & Pricing

Pricing is all over the place depending on where you shop. In the US you're looking at $230 to $247, while European buyers see a spread from EUR 212 to EUR 300. The best EUR deal we found is at the lower end of that range, so it pays to shop around. Canadian pricing runs CAD 288 to CAD 380, and again, the lower end is where you want to be. It's not a budget drive, but you're paying for proven performance and reliability. If you catch it near the bottom of those ranges, it's a good deal.

From CA$320 4 offers across 3 retailers
Canada Computers 2 offers From CA$320
Amazon 1 offer From CA$380
Memory Express 1 offer From CA$300

Price History

New Open Box / Refurbished
CA$270 CA$280 CA$290 CA$300 CA$310 CA$320 CA$330 Nov 8 CA$320

Read more

Overview

The WD_BLACK SN850X 1TB is one of those drives that just works, and works fast. You get 7,300 MB/s reads and 6,300 MB/s writes on paper, and real-world benchmarks from owners land close enough that nobody's complaining. It's a PCIe 4.0 drive with TLC NAND, DRAM cache, and a heatsink, so it's built for sustained loads, not just quick bursts.

Our database puts this thing in the top tier for social proof and features, with speed and endurance also ranking high. It's not the cheapest 1TB drive out there, but it's one of the most trusted. If you're building a gaming rig or upgrading a laptop, this is a very safe bet.

Common Questions

Q: Does this drive need a heatsink?

This version includes a heatsink, which helps during sustained transfers and gaming. If your motherboard already has a built-in M.2 heatsink, you can still use this drive, but you may need to remove the included one depending on clearance.

Q: Is the SN850X good for PS5?

Yes, it meets the PS5's minimum speed requirement of 5,500 MB/s and fits in the expansion slot. The heatsink version is especially handy for console use since airflow is limited.

Q: How does the 1TB version compare to the 2TB?

The 2TB version offers higher endurance and slightly better sustained write performance due to more NAND chips. The 1TB model is still very fast, but heavy content creators might prefer the larger capacity.

Who Should Skip This

Skip this if you need a portable drive, because it scores terribly for portable use and belongs inside a desktop or laptop. Also skip it if you're on a tight budget, since cheaper Gen4 drives like the Crucial T500 deliver most of the speed for less money. And if you need more than 1TB, just buy the 2TB version instead of trying to make this work.

Verdict

If you want a fast, reliable 1TB Gen4 SSD and don't want to gamble on a lesser-known brand, buy this. It's ideal for gaming desktops, laptops, and even light workstation use. The heatsink version is a nice bonus if your motherboard doesn't have one built in. Just don't expect it to be the cheapest option on the shelf.

Usage Scores

Overall (86.7)Budget (93.8)Gaming (84.7)Laptop (90)Console (80.3)Portable (21.1)Workstation (85.8)
  • Overall86.7
  • Budget93.8
  • Gaming84.7
  • Laptop90
  • Console80.3
  • Portable21.1
  • Workstation85.8

Other Configurations2

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