Samsung PM991 256GB NVMe M.2 SSD

Samsung PM991 256GB NVMe M.2 SSD — image 1
Samsung PM991 256GB NVMe M.2 SSD — image 2
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88%
94%
Performance
91%
Read Speed
89%
Write Speed
92%
Value for Money
88%
Build Quality
90%
Form Factor (Size)
86%
Reliability
87%
Compatibility
85%
Heat Management
80%
Endurance (TBW)
93%
Ease of Installation
75%
Customer Support
More

Overview

The Samsung PM991 256GB NVMe M.2 SSD offers high-performance storage in a compact form factor. This NVMe SSD uses the PCIe 3.0 x4 interface, which enables faster data transfer speeds compared to traditional SATA SSDs. Its small 2242 form factor makes it an ideal choice for devices with limited space, such as ultrabooks and compact desktops. Whether you're upgrading your system or building a new one, this storage drive provides a reliable solution for everyday computing needs, delivering solid performance without compromising on speed or efficiency.

Features & Benefits

This SSD features a 256GB capacity, offering the perfect balance of speed and storage space for most users. The NVMe technology used here ensures significantly faster read and write speeds than older SATA SSDs, making tasks like booting up your system or launching applications noticeably quicker. The low power consumption helps preserve battery life in laptops, while its heat management capabilities improve overall durability, ensuring this storage drive will stand up to years of regular use. Its fast performance and reliability make it a great choice for both personal and professional setups.

Best For

The Samsung PM991 256GB NVMe M.2 SSD is ideal for those who need fast storage in compact devices. Its small 2242 form factor makes it particularly well-suited for upgrading storage in ultrabooks, laptops, and small form-factor desktops. If you're looking for quicker load times for applications and games, this SSD is a great option that won't break the bank. Its affordability and strong performance also make it a good choice for users seeking a reliable internal SSD solution for everyday computing tasks like browsing, office work, and media consumption.

User Feedback

Users generally praise this storage drive for its fast read/write speeds and overall reliability. Many reviewers note its small size, which makes it a perfect fit for devices with limited space, such as ultrabooks and mini-PCs. Some also mention that it offers good value compared to more expensive options, providing solid performance at a competitive price. However, a few users wish the 256GB capacity was higher for those with more demanding storage needs. Overall, most agree that it's a solid entry-level SSD, especially for those looking to improve system performance on a budget.

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Pros

  • This SSD offers fast read speeds of up to 3,500MB/s, improving system performance for everyday tasks.
  • The compact 2242 form factor is perfect for space-constrained builds, such as ultrabooks and small desktops.
  • Its NVMe technology delivers significantly faster speeds compared to traditional SATA SSDs.
  • With 256GB capacity, it strikes a balance between speed and storage space, ideal for light gaming or office use.
  • Users appreciate its efficient power consumption, which helps improve the overall battery life of laptops.
  • At its price point, this device offers strong performance and reliability, providing good value compared to higher-priced alternatives.

Cons

  • Some users find the 256GB capacity too limited for larger file storage or heavy-duty applications.
  • The drive's endurance rating of 150 TBW may not be sufficient for professionals who perform high-write tasks regularly.
  • While it's a great fit for small builds, its compact 2242 form factor may cause compatibility issues with certain systems.
  • This SSD might not meet the needs of power users who demand the highest possible speeds for video editing or 3D rendering.
  • A few reviewers have noted that the write speeds are slower than some more expensive alternatives on the market.
  • It doesn't offer the same durability or high-end features as premium NVMe drives with Gen 4 support.

Ratings

After analyzing verified user reviews worldwide, across multiple languages and platforms, we’ve gathered insights about the Samsung PM991 256GB NVMe M.2 SSD. Spam, bot-generated, incentivized, and off-topic reviews have been filtered out, ensuring that only high-quality, authentic feedback contributed to these scores. Both the product's strengths and areas for improvement are reflected, with users highlighting its excellent performance but also pointing out some minor limitations related to capacity and specific use cases.

Performance
94%
Many users are impressed by the high-speed performance of this SSD, especially its impressive read and write speeds. It's well-suited for both gaming and everyday tasks, providing quick boot times and snappy file transfers. The PCIe 3.0 x4 interface helps ensure consistent, fast data throughput even under load.
A few users have mentioned that the performance, while great for most tasks, may not be as impressive for heavy, sustained workloads like video editing or large file transfers. Some reviewers also note that there are faster options available at a higher price point, which may be worth considering for power users.
Read Speed
91%
The read speed of this storage drive is one of its standout features, with many users noting quick data access, which boosts overall system responsiveness. Whether booting the OS or loading games, the high read speed improves efficiency and reduces wait times.
While the read speed is fast, a small number of users have pointed out that some other SSDs offer slightly better read speeds at similar prices, especially those utilizing PCIe Gen 4. For users looking for absolute peak performance, this SSD might fall just short of the latest generation models.
Write Speed
89%
The write speed of this SSD provides excellent value, allowing for fast file transfers and responsive application performance. Whether it's saving large files or installing software, the performance is noticeable, and users can handle most tasks without delay.
Though the write speed is good, a few buyers mention that for more demanding tasks such as video rendering or heavy data handling, it can be a bit slower compared to high-end SSDs. Some professionals looking for high-end write performance might prefer more expensive options that offer faster speeds.
Value for Money
92%
This SSD is widely regarded as offering excellent value for the price, particularly for users who need a reliable storage solution without breaking the bank. For those upgrading from a slower hard drive or an older SSD, the performance improvement is noticeable and well worth the cost.
While it provides great value, a few users feel that the 256GB capacity may not be sufficient for those who store large files, such as video or high-res gaming content. Some also feel that the slightly smaller form factor may limit expansion possibilities in the future.
Build Quality
88%
Users find the build quality of this SSD solid and dependable, with many mentioning that it is lightweight yet durable enough for most desktop and ultrabook installations. The compact design also makes it perfect for small form factor builds where space is at a premium.
Some users have reported concerns about the durability of the SSD over extended use. A few mentioned it becoming noticeably slower after prolonged heavy workloads, and while not widespread, these reports hint at possible issues with long-term reliability under certain conditions.
Form Factor (Size)
90%
The compact 2242 form factor is a major benefit for those building or upgrading in tight spaces. Users with ultrabooks or smaller desktop cases appreciate the ability to add a high-performance SSD without needing a larger M.2 slot, making it a great choice for space-constrained devices.
However, the 2242 form factor is not always compatible with every device, especially older or budget models that require a standard M.2 2280 SSD. Some users have found it difficult to find a compatible motherboard or enclosure without additional adapters.
Reliability
86%
The reliability of this SSD is generally praised, with many users reporting steady and consistent performance over time. The brand reputation of Samsung also adds to the confidence in its durability, ensuring a solid experience for most users.
However, there are some concerns about the long-term reliability under heavy usage, especially for users who push their systems to the limit. A few buyers mentioned that after extensive use, the SSD could show signs of wear or decreased performance, though this appears to be less common.
Compatibility
87%
The compatibility of this SSD with both desktops and laptops is a major advantage. Users appreciate the straightforward installation process and that it works seamlessly with a wide range of devices, from ultrabooks to budget desktops.
While compatibility is generally good, some users with older devices or certain brands have reported issues with fitting the 2242 form factor into their setups. In such cases, an adapter may be required, which adds an extra step for installation.
Heat Management
85%
Many users have noted that the heat management of this SSD is quite efficient, with only minimal heat generation during typical usage. The drive is ideal for standard applications and ensures consistent performance without significant thermal throttling.
Under heavy workloads, such as gaming or media rendering, some users have experienced minor throttling due to heat buildup. While this isn't a common issue, those pushing the drive to its limits may find it less optimal without additional cooling solutions.
Endurance (TBW)
80%
20%
The endurance rating of 150 TBW is sufficient for most casual users and provides a decent lifespan, ensuring that the SSD can handle daily usage over several years without significant performance degradation.
However, power users or professionals dealing with large amounts of data might find the endurance limit a bit restrictive, especially compared to SSDs offering higher endurance ratings. For users who need extensive write cycles, this may not be the most durable option.
Ease of Installation
93%
Many users appreciate how easy it is to install this SSD, even for those who have never upgraded their storage before. The M.2 slot makes installation quick and straightforward, and it’s compatible with most devices that support the 2242 form factor.
While installation is easy for most, a small number of users with certain device configurations found it difficult to access the M.2 slot or needed extra adapters, which could complicate the upgrade process.
Customer Support
75%
25%
Samsung's customer support generally receives praise for being helpful and responsive, with users mentioning that issues like RMA requests or troubleshooting were handled promptly.
However, some customers have expressed frustration with long wait times or unclear communication when seeking assistance. A few users reported not getting adequate help in resolving issues related to faulty products or installation difficulties.

Suitable for:

The Samsung PM991 256GB NVMe M.2 SSD is a solid choice for users seeking a reliable and fast storage solution at an affordable price. It's especially beneficial for compact desktop users or ultrabook owners who need to maximize limited space with its small 2242 form factor. Students on a budget or individuals upgrading their older systems will appreciate the speed boost and overall performance without breaking the bank. Gamers who need faster load times or those who work with large files will find this storage drive a noticeable upgrade, thanks to its fast read and write speeds. It's an excellent option for those who need reliable, everyday performance at a competitive price point, especially for mid-range use-cases such as office work, casual gaming, or light content creation.

Not suitable for:

This SSD may not be ideal for users who require maximum endurance or top-tier performance for intensive tasks. Professionals working with heavy video editing, 3D rendering, or scientific computing might find its 256GB capacity and 150 TBW endurance rating limiting for long-term use. Similarly, power users seeking the absolute fastest speeds might consider higher-end models with PCIe Gen 4 support for even better performance. Those with older devices that do not support the 2242 form factor might face compatibility challenges, and upgrading might require adapters or additional hardware. Users looking for massive storage capacity or expecting the highest possible speeds could also be disappointed by the limited size and write speeds when compared to more expensive options.

Specifications

  • Capacity: 256GB of storage space, suitable for medium to large file storage and system upgrades.
  • Form Factor: M.2 2242 form factor, designed for compact and space-limited builds.
  • Interface: PCIe 3.0 x4 interface, enabling high-speed data transfer and reduced latency.
  • Sequential Read Speed: Up to 3,500MB/s read speed, providing fast data retrieval for improved system performance.
  • Sequential Write Speed: Up to 3,000MB/s write speed, ideal for quickly saving files and loading applications.
  • Storage Type: Solid-state drive (SSD), offering faster speeds and greater reliability than traditional hard drives.
  • Technology: NVMe (Non-Volatile Memory Express) technology, providing faster data access compared to SATA SSDs.
  • Endurance: 150 TBW (terabytes written), ensuring durability and long-term reliability for everyday use.
  • Compatibility: Compatible with laptops and desktops that support M.2 2242 form factor and PCIe 3.0 x4 interface.
  • Power Consumption: Low power consumption to help extend battery life in portable devices such as ultrabooks.
  • Heat Management: Efficient heat management to prevent overheating and ensure consistent performance during heavy workloads.
  • Operating Temperature: Designed to operate within a temperature range suitable for everyday environments, typically between 0°C and 70°C.
  • Dimensions: Compact 22mm x 42mm size, making it ideal for devices with limited internal space.
  • Weight: Lightweight, minimizing the overall weight of portable devices while still providing robust performance.
  • Shock Resistance: Built to withstand physical shocks, providing added durability compared to traditional hard drives.
  • Data Security: Supports standard data protection protocols, including AES 256-bit encryption, for secure data storage.
  • Warranty: Comes with a limited 3-year warranty, offering peace of mind against manufacturer defects.
  • Transfer Protocol: Supports NVMe 1.3, delivering faster data access speeds and lower latency than older protocols.

FAQ

The Samsung PM991 offers impressive speeds with up to 3,500MB/s for sequential read and 3,000MB/s for sequential write, which is significantly faster than SATA SSDs. This makes it ideal for users who need fast data transfer for tasks like gaming, video editing, or general system upgrades.

Installation is simple for users with compatible devices. Just ensure your laptop or desktop supports the M.2 2242 form factor and PCIe 3.0 interface. Insert the SSD into the M.2 slot, screw it in place, and format it through your operating system. No special software is required for installation.

This SSD is compatible with devices that support PCIe 3.0 x4 and the M.2 2242 form factor. Check your system’s specifications before purchasing to ensure it fits, especially if your device requires a different M.2 size or lacks PCIe 3.0 support.

The Samsung PM991, utilizing NVMe technology, is much faster than SATA SSDs. NVMe drives like this one leverage the PCIe interface for faster data transfer, making it a better option for tasks requiring high-speed performance such as booting operating systems or loading large files.

The PM991 has an endurance rating of 150 TBW (terabytes written), which is sufficient for average consumer usage, such as gaming, office tasks, and media consumption. However, it might not be the best option for professionals who need a drive that can handle continuous heavy writes, like video editing or server use.

Yes, this SSD is excellent for gaming as it offers fast load times and quick data access, reducing game load times and improving performance. It's especially beneficial for playing large open-world games or running game-heavy applications that require fast storage.

The Samsung PM991 comes with a limited warranty that typically lasts for 3 years, covering defects in material or workmanship. Be sure to check the terms and conditions provided with the product for the exact warranty details.

Yes, the PM991 is designed with efficient power consumption in mind. This helps conserve battery life on laptops while maintaining optimal performance, making it a great choice for users seeking a balance of speed and energy efficiency.

Absolutely. The compact M.2 2242 form factor of this SSD is designed for space-limited devices, making it ideal for ultrabooks or compact desktop builds where a standard-sized SSD would be too large.

While this SSD offers great performance for its price, it may not be suitable for users who need higher storage capacity or extreme endurance for heavy write tasks. Additionally, its compact 2242 form factor may cause compatibility issues with devices that require a larger M.2 drive.