Samsung 990 Pro SSD Review: 9.2/10 - The pinnacle of Gen 4 NVMe storage
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At a Glance
The Samsung 990 Pro remains one of the best PCIe 4.0 SSDs you can buy, combining outstanding performance with proven reliability and excellent software support.
Prices last checked June 2026
Overview
The Samsung 990 Pro SSD sets the benchmark for PCIe Gen 4 NVMe storage, offering class-leading sequential speeds of 7,450 MB/s read and 6,900 MB/s write. Backed by Samsung’s 176-layer V-NAND TLC flash and a custom in-house Pascal controller, this drive delivers exceptional throughput for gaming, content creation, and professional workloads. Available in 1TB, 2TB, and 4TB capacities, the 990 Pro is among the fastest Gen 4 drives on the market. It competes directly with the WD Black SN850X (7,300 MB/s) and Seagate FireCuda 530 (7,300 MB/s), but edges ahead in peak sequential read and random write performance thanks to Samsung’s optimized Pascal controller and 176-layer NAND architecture.
Design & Build
The 990 Pro uses the standard M.2 2280 form factor with a single-sided PCB for the 1TB and 2TB models, making it compatible with laptops and PS5 consoles alike (the 4TB model uses a double-sided PCB). The controller is paired with a nickel-coated heat spreader and Samsung’s Dynamic Thermal Guard technology to manage heat under sustained loads, keeping temperatures below 70degC in typical use. The drive’s power efficiency is impressive for Gen 4, drawing only 5.8W during active reads and dropping to 55mW at idle - among the best in class. Build quality is excellent, as expected from Samsung’s Pro lineup, with the PCB secured in a precise-fitting M.2 form factor with no sharp edges or burrs.
Performance
In CrystalDiskMark testing, the 990 Pro hits its rated 7,450 MB/s sequential reads and 6,900 MB/s sequential writes with ease. Random performance is equally strong at 1.4 million IOPS read and 1.55 million IOPS write in QD32 tests. Real-world transfers of a 50GB game folder complete in under 12 seconds, and boot times in Windows 11 are around 8 seconds from cold start. The drive maintains consistent performance even during prolonged write workloads thanks to its generous SLC cache and efficient controller design.
Features
Samsung Magician software provides comprehensive drive management including firmware updates, performance optimization (including full benchmark suite), drive health monitoring with wear-leveling indicators, and encryption management. The 990 Pro supports AES 256-bit hardware-based encryption with TCG/Opal 2.0 compliance for enterprise-grade data security and is compatible with Microsoft BitLocker and other TCG-aware encryption tools. NVMe 2.0 protocol support ensures broad compatibility with modern platforms including Intel 12th/13th/14th Gen and AMD AM5 chipsets. The drive also fully supports TRIM, garbage collection, and Samsung’s proprietary V-NAND technology for sustained long-term performance.
Pros
- Outstanding sequential performance (7,450 MB/s read, 6,900 MB/s write) and random IOPS (1.55M write) for PCIe 4.0
- Excellent power efficiency - only 5.8W active read, 55mW idle, best in class
- Reliable Samsung in-house Pascal controller and firmware with proven track record
- Comprehensive Samsung Magician software suite with firmware updates, benchmarks, and encryption management
- 5-year warranty with high endurance ratings (1,200 TBW on 2TB model), single-sided PCB for PS5 and laptop compatibility
Cons
- PCIe 5.0 drives (Crucial T700, FireCuda 540) now offer 12,400+ MB/s - nearly double the 990 Pro’s sequential speed
- No heatsink included on standard model for heavy workloads; aftermarket cooling recommended for sustained transfers
- Premium pricing compared to some Gen 4 rivals (WD SN850X is often $10-20 less per TB)
- 4TB capacity variant took time to reach market and remains scarce at retail
- Firmware-related health reporting bugs affected early production units (fixed in later firmware revisions)
Verdict
The Samsung 990 Pro remains one of the best PCIe 4.0 SSDs you can buy, combining outstanding performance with proven reliability and excellent software support. It is the ideal choice for high-end gaming PCs, creative workstations, and PS5 storage expansion. While PCIe 5.0 drives now offer higher peak sequential speeds, the 990 Pro’s power efficiency, single-sided PCB, and mature firmware ecosystem make it the more practical choice for most builds in 2025-2026. Its closest competitor, the WD Black SN850X, matches it in most metrics but lacks Samsung Magician’s depth of features.
Sources
Where to Buy
Check current pricing on eBay or Amazon.
Prices last checked June 2026. Pricing and availability are accurate as of the date/time indicated and are subject to change.
📊 Comparison: Samsung 990 Pro SSD vs. Competitors
| Specification | Samsung 990 Pro SSD | Crucial T700 | WD Black SN850X | Samsung T7 Shield |
|---|---|---|---|---|
| Price | $170 | $290 | $160 | $160 |
| Capacity | 1TB, 2TB, 4TB | 1TB, 2TB, 4TB | 1TB, 2TB, 4TB, 8TB | 1TB, 2TB, 4TB |
| Interface | PCIe Gen 4.0 x4, NVMe 2.0 | PCIe Gen 5.0 x4, NVMe 2.0 | PCIe Gen 4.0 x4, NVMe 1.4 | USB 3.2 Gen 2 (10 Gbps), USB-C |
| Form Factor | M.2 2280 | M.2 2280 | M.2 2280 | -- |
| Controller | Samsung Pascal in-house controller | Phison E26 | WD Black G2 (20-82-20035-B2) | -- |
| NAND | Samsung 176-layer V-NAND 3-bit TLC | Micron 232-layer 3D TLC | Kioxia 112-layer BiCS5 TLC | -- |
| DRAM | 1GB LPDDR4 (1TB), 2GB LPDDR4 (2TB) | Yes, onboard DDR4 | Yes, onboard DDR4 | -- |
| Seq Read | 7,450 MB/s | 12,400 MB/s | 7,300 MB/s | 1,050 MB/s |
| Seq Write | 6,900 MB/s | 11,800 MB/s | 6,600 MB/s | 1,000 MB/s |
| Random Read | 1,400K IOPS (2TB) | 1,500K IOPS | 1,200K IOPS | -- |
| Random Write | 1,550K IOPS | 1,500K IOPS | 1,100K IOPS | -- |
| Endurance | 600 TBW (1TB), 1,200 TBW (2TB) | 600 TBW (1TB), 1,200 TBW (2TB), 2,400 TBW (4TB) | 600 TBW (1TB), 1,200 TBW (2TB) | -- |
| Warranty | 5-year limited | 5-year limited | 5-year limited | 3-year limited |
| Durability | -- | -- | -- | IP65 rating, 3-meter drop resistant |
| Encryption | -- | -- | -- | AES 256-bit hardware encryption |
| Dimensions | -- | -- | -- | 88 x 59 x 13 mm |
| Weight | -- | -- | -- | 98 grams |
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