The original Samsung 990 EVO is a capable mainstream NVMe SSD, but its appeal depends on your system and workload. Its strengths include up to 5,000 MB/s sequential reads, support for specified PCIe 4.0 x4 or PCIe 5.0 x2 host configurations, and a compact M.2 2280 design. Its trade-offs are a DRAM-less, Host Memory Buffer (HMB) architecture and performance that reviewers found less impressive in some benchmark and sustained-write scenarios. Those figures and reviews apply to the 990 EVO, not the later 990 EVO Plus.
Samsung 990 EVO specifications at a glance
| Specification | Samsung 990 EVO |
|---|---|
| Capacities | 1TB and 2TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4 / PCIe 5.0 x2, as specified by Samsung |
| Maximum sequential read | Up to 5,000 MB/s, Samsung manufacturer rating |
| Maximum sequential write | Up to 4,200 MB/s, Samsung manufacturer rating |
| Cache design | Host Memory Buffer (HMB); no onboard DRAM |
Samsung’s 2024 product specification and launch materials list these capacities, interface options and sequential ratings. They are maximum manufacturer figures, not guaranteed results: performance varies with system configuration, test conditions and workload. See Samsung’s 990 EVO launch announcement and its revision 1.1 datasheet.
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What are the Samsung 990 EVO’s main advantages?
Rated speeds suit many everyday uses
Samsung rates sequential reads at up to 5,000 MB/s and writes at up to 4,200 MB/s. These peaks make the drive a plausible choice for a mainstream internal upgrade, but they do not predict every task: sequential transfers and sustained writes can behave differently from routine app launches, game loading or mixed computer use.
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Two supported interface configurations
Samsung specifies the drive for PCIe 4.0 x4 or PCIe 5.0 x2. This gives it flexibility across hosts that implement one of those configurations, but it is not a full-bandwidth PCIe 5.0 x4 SSD. The interface label alone does not guarantee a speed advantage; the host’s lanes, implementation and workload all matter.
#1 Best Overall
- GROUNDBREAKING READ/WRITE SPEEDS: The 990 EVO Plus features the latest NAND memory, boosting sequential read/write speeds up to 7,150/6,300MB/s*. Ideal for huge file transfers and finishing tasks faster than ever.
- LARGE STORAGE CAPACITY: Harness the full power of your drive with Intelligent TurboWrite2.0's enhanced large-file performance—now available in a 4TB capacity.
- EXCEPTIONAL THERMAL CONTROL: Keep your cool as you work—or play—without worrying about overheating or battery life. The efficiency-boosting nickel-coated controller allows the 990 EVO Plus to utilize less power while achieving similar performance.
- OPTIMIZED PERFORMANCE: Optimized to support the latest technology for SSDs—990 EVO Plus is compatible with PCIe 4.0 x4 and PCIe 5.0 x2. This means you get more bandwidth and higher data processing and performance.
- NEVER MISS AN UPDATE: Your 990 EVO Plus SSD performs like new with the always up-to-date Magician Software. Stay up to speed with the latest firmware updates, extra encryption, and continual monitoring of your drive health–it works like a charm.
Compact format and two capacities
The M.2 2280 format is common in internal storage upgrades, and Samsung lists 1TB and 2TB options. Whether either fits depends on the computer’s slot, clearance and supported drive type—not just whether the machine has an M.2 connector.
HMB supports a DRAM-less design
The 990 EVO has no onboard DRAM cache. Instead, it uses Host Memory Buffer, which Samsung describes as linking the SSD with host memory to support performance. This is a design trade-off, not proof that the drive cannot work as a boot drive. What it means in practice depends on the workload and cache state.
Rank #2
- GROUNDBREAKING READ/WRITE SPEEDS: The 990 EVO Plus features the latest NAND memory, boosting sequential read/write speeds up to 7,250/6,300MB/s. Ideal for huge file transfers and finishing tasks faster than ever.
- LARGE STORAGE CAPACITY: Harness the full power of your drive with Intelligent TurboWrite2.0's enhanced large-file performance—now available in a 4TB capacity.
- EXCEPTIONAL THERMAL CONTROL: Keep your cool as you work—or play—without worrying about overheating or battery life. The efficiency-boosting nickel-coated controller allows the 990 EVO Plus to utilize less power while achieving similar performance.
- OPTIMIZED PERFORMANCE: Optimized to support the latest technology for SSDs—990 EVO Plus is compatible with PCIe 4.0 x4 and PCIe 5.0 x2. This means you get more bandwidth and higher data processing and performance.
- NEVER MISS AN UPDATE: Your 990 EVO Plus SSD performs like new with the always up-to-date Magician Software. Stay up to speed with the latest firmware updates, extra encryption, and continual monitoring of your drive health–it works like a charm.
What are the drawbacks and trade-offs?
It is not a flagship-performance choice
The 990 EVO’s official sequential ratings are lower than those of Samsung’s higher-end 990 PRO. If your priority is top-tier SSD performance, compare the specific models’ own specifications and independent results rather than treating the EVO as a PRO equivalent.
Results vary with workload and cache
Tom’s Hardware characterized the 990 EVO as relatively good all-around and in sustained performance within its test context. PCWorld, reviewing the 2TB model, found its benchmark showing unspectacular, while reporting more favorable real-world sequential transfers when secondary cache was available. Taken together, those findings argue against a single universal verdict: short or ordinary activity may tell a different story from large writes or a test that stresses the drive after cache is used. Neither review establishes one slowdown rate that applies to every system or transfer.
Rank #3
- READ/WRITE SPEEDS UP TO 5,000/4,200 MB/s: Load games and save files in a flash. Bring power to your productivity with read and write speeds of up to 5,000/4,200 MB/s.* The 990 EVO provides continuous speed to keep you going.
- POWER EFFICIENCY: Save the power for your performance. Get power efficiency all while experiencing up to 70% improved performance per watt over the 970 EVO Plus.* It makes every move more effective with less power consumption overall.
- SMART THERMAL CONTROL: Now you can ramp things up without overheating the system. Samsung’s fine tuned controller and heat spreading label deliver effective thermal control to avoid sudden performance drops mid project. It cools things down even when things are running high, so your hard earned checkpoints are saved.
- PCIe 5.0 INTERFACE: Optimized to support the latest technology for SSDs 990 EVO is compatible with PCIe 4.0 x4 and PCIe 5.0 x2. This means you get more bandwidth and higher data processing and performance. Overall, it does more to support smooth storage with less power consumption.
- ALWAYS UP TO DATE VIA MAGICIAN SOFTWARE: It’s not hocus pocus. Your 990 EVO SSD performs like new with the always up to date Magician Software. Stay up to speed with the latest firmware updates, extra encryption and continual monitoring of your drive health it works like a charm.
For the test-specific context, see Tom’s Hardware’s sustained-write testing and PCWorld’s 2TB review.
The efficiency claim needs context
Samsung said the 990 EVO offers up to 70% improved power efficiency compared with the 970 EVO Plus. That is a vendor comparison, not a promise of a 70% improvement in a laptop’s battery life. Tom’s Hardware questioned how closely measured efficiency matched Samsung’s claim and reported a higher-than-expected maximum power result in its testing. Real power and battery impact depend on the drive’s activity and the host system.
Rank #4
- MEET THE NEXT GEN: Consider this a cheat code; Our Samsung 990 PRO Gen4 SSD helps you reach near max performance with lightning-fast speeds; Whether you’re a hardcore gamer or a tech guru, you’ll get power efficiency built for the final boss
- REACH THE NEXT LEVEL: Gen4 steps up with faster transfer speeds and high-performance bandwidth; With a more than 55% improvement in random performance compared to 980 PRO, it’s here for heavy computing and faster loading
- THE FASTEST SSD FROM THE WORLD'S FLASH MEMORY BRAND: The speed you need for any occasion; With read and write speeds up to 7450/6900 MB/s you’ll reach near max performance of PCIe 4.0 powering through for any use
- PLAY WITHOUT LIMITS: Give yourself some space with storage capacities from 1TB to 4TB; Sync all your saves and reign supreme in gaming, video editing, data analysis and more
- IT’S A POWER MOVE: Save the power for your performance; Get power efficiency all while experiencing up to 50% improved performance per watt over the 980 PRO; It makes every move more effective with less consumption
Current value depends on the price you can get
Specifications and historical launch information cannot establish whether the 990 EVO is a good deal today. Compare the current local price of the capacity you need with similarly compatible drives, and weigh performance under your workload rather than choosing by a peak sequential number alone.
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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Will the 990 EVO work in your computer?
Check the computer or motherboard documentation before buying. An M.2 socket may support SATA, NVMe or both; the 990 EVO requires a compatible NVMe implementation. Confirm the slot’s interface and lane configuration, physical clearance and supported M.2 length. Samsung’s PCIe support statement does not ensure that every host will provide the same bandwidth or results.
Best Value
- HUGE SPEED BOOST: Get random read/write speeds that are 40%/55% faster than 980 PRO; Experience up to 1400K/1550K IOPS, while sequential read/write speeds up to 7,450/6,900 MB/s reach near the max performance of PCIe 4.0*
- BREAKTHROUGH POWER EFFICIENCY: Use less power and get more performance; Enjoy up to 50% improved performance per watt over 980 PRO, plus optimal power efficiency with max PCIe 4.0 performance**
- SMART THERMAL CONTROL: Samsung's own nickel-coated controller delivers effective thermal control; With its slim size, 990 PRO is a perfect fit for desktops and laptops that meet the PCI-SIG D8 standard***
- THE CHAMPION MAKER: Up to 65% improvement in random performance enables faster loads for an ultimate gaming experience on PS5 and DirectStorage PC games****
- SAMSUNG MAGICIAN SOFTWARE: Get the most out of your SSD with Samsung Magician's advanced yet intuitive optimization tools; Monitor drive health, protect valuable data, and receive important updates for your 990 PRO
- Verify that the slot supports M.2 NVMe SSDs.
- Check whether the host supports the drive’s PCIe configuration and what lane width it provides.
- Confirm M.2 2280 physical fit and any clearance restrictions.
- Use the system maker’s documentation to check installation and storage support.
Who should choose the Samsung 990 EVO?
It may fit
- Someone upgrading a compatible M.2 NVMe system who wants a mainstream internal SSD in 1TB or 2TB.
- Someone whose needs are general computing and ordinary storage activity, rather than consistently heavy, large writes.
- A buyer who has confirmed the slot and finds the drive competitively priced against compatible alternatives.
Look more closely at alternatives
- If you regularly write very large files or depend on sustained throughput, compare independent sustained-write results for the exact models under consideration.
- If you want a flagship drive, compare the 990 EVO with the 990 PRO and other candidates on their own specifications and workload-relevant testing.
- If laptop battery life or thermals are central, look for measurements from a comparable host and use case; Samsung’s efficiency claim alone does not settle that question.
990 EVO vs. 990 PRO: the useful distinction
The 990 EVO is the mainstream model in this comparison, with official maximum sequential ratings of 5,000/4,200 MB/s and HMB rather than onboard DRAM. The 990 PRO is positioned higher in Samsung’s range. These facts do not by themselves prove which is the better purchase: the answer depends on actual workload, compatible interface, capacity and current local pricing. Do not substitute 990 EVO Plus specifications for either model.
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