This article covers Samsung SSD 256GB PM981a M.2 2280 PCIe Gen3 x4 NVMe MZVLB256HBHQ MZ-VLB256B SED Opal Compatible avec Lenovo Dell HP Acer Asus.

Overview

The Samsung PM981a is an M.2 2280 NVMe SSD featuring a PCIe Gen3 x4 interface, delivering sequential read speeds of up to 3,500 MB/s and write speeds of up to 2,200 MB/s. With 256 GB of capacity, this drive is primarily designed for OEM systems such as laptops and desktops from Lenovo, Dell, HP, and others. It also supports OPAL SED (Self-Encrypting Drive) for hardware-based data security, making it a solid choice for business users who need encryption. Released in 2020, the PM981a remains a reliable mid-range NVMe solution for everyday computing and OS boot drives.
Although the PM981a is not widely available at retail stores, it can be found through online marketplaces like online retailers as both new and used units. The price of ¥24,587 on online retailers reflects its OEM nature ??? it is typically sold as a bare drive without accessories or official Samsung warranty. For users comfortable with OEM parts, this drive offers excellent value for upgrading older PCs with an M.2 NVMe slot.

Compatibility Guide

  • Interface and Form Factor: PCIe 3.0 x4 NVMe, M.2 2280. Works in any M.2 slot supporting NVMe (not SATA only). Backward compatible with PCIe 4.0 slots but limited to Gen3 speeds.
  • Host Compatibility: Confirmed to work with Lenovo, Dell, HP, Acer, and ASUS systems. Some proprietary laptops may have BIOS whitelists that reject non-OEM drives, so verify compatibility before purchase.
  • OS and Drivers: Native support in Windows 10/11 and Linux. No additional drivers required, though Samsung NVMe drivers may be installed for optimal performance.
  • Socket: M.2 Key M slot required. The drive does not support SATA protocol.

Product Info

Announced in 2020, the Samsung PM981a is positioned as a mid-range NVMe SSD, utilizing Samsung's Phoenix controller paired with 92-layer TLC NAND. Sequential performance is rated at 3,500/2,200 MB/s, while random read/write reaches 240K/480K IOPS. The 1 TB model includes 1 GB of DRAM cache; the 256 GB model likely has a smaller DRAM buffer (typically 256 MB or 512 MB).
As an OEM drive, it lacks retail packaging and official Samsung warranty. The market price of ¥24,587 (Japanese online retailers) is relatively high for a 256 GB Gen3 SSD, but the drive's build quality and SED support justify the cost for specific use cases. It is not meant for mass-market retail, and buyers should source from reputable sellers.

Best Use Cases

  • Business Laptop Users: If you own a Lenovo, Dell, or HP laptop that originally came with a SATA or slower NVMe drive, upgrading to the PM981a provides a noticeable performance boost. The OPAL SED feature is ideal for corporate environments where data encryption is mandatory.
  • Budget DIY Builders: For a secondary PC or a home server, this SSD offers reliable NVMe speeds without breaking the bank. It’s especially suitable for OS drives where storage capacity is less critical.
  • Security-Conscious Users: The hardware-based encryption (TCG Opal 2.0 compliant) helps protect data at rest, making it a strong choice for portable laptops that may be lost or stolen.
    Who should NOT buy this: Gamers needing fast load times for modern games will find 256 GB too small; content creators working with large video files will also outgrow it quickly. For those use cases, consider a 1 TB or larger PCIe 4.0 drive.

Things to Consider

  • OEM Caveats: Since this is an OEM product, you won't get Samsung Magician support for firmware updates or over-provisioning. Firmware updates must come from the laptop manufacturer, which can be cumbersome.
  • Price vs. Performance: At ¥24,587, the 256 GB PM981a is not a bargain compared to newer 512 GB Gen3 NVMe drives often available for less. You are paying for the Samsung brand and SED capability.
  • Used Drive Health: If buying used, check S.M.A.R.T. attributes for total writes (TBW) and power-on hours. The 256 GB model has an endurance of 150 TBW, which translates to roughly 0.41 years of daily 1 TB writes ??? though real-world usage is far lower, so most used drives still have plenty of life.
  • No DRAM Cache in Some Capacities: While the 1 TB model has 1 GB DRAM, smaller capacities may have reduced or zero DRAM. This affects performance under sustained writes and heavy multitasking.

FAQ

Q: How does the PM981a compare to the Samsung 970 EVO Plus?
A: The 970 EVO Plus is a retail product with full Samsung support and warranty, while the PM981a is an OEM variant. Performance is nearly identical, but the PM981a often has slightly better read speeds. The main trade-off is warranty and firmware support.
Q: Can I use this SSD in a PS4 or PS5 console?
A: No, the PM981a is a standard M.2 NVMe SSD. It is not compatible with PlayStation consoles because PS4 uses internal SATA and PS5 requires PCIe 4.0 with specific heatsink requirements.
Q: Is OPAL SED easy to enable?
A: Enabling OPAL SED typically requires a compa

Product Disclosure (Amazon)

  • Manufacturer: サムスン(SAMSUNG)
  • Seller: ミツ商店
  • Fulfilled by: ミツ商店
  • ASIN: B08K8VNPLJ
  • Note: This article covers a manufacturer-made product based on Amazon listing details.