Description
🔍Key Specifications
| Parameter | Detail |
|---|---|
| Model | Samsung SSD 990 PRO, 4TB (Model code: MZ-V9P4T0BW / MZV9P4T0B/AM) |
| Form Factor | M.2 2280 |
| Interface | PCIe Gen 4.0 x4, NVME 2.0 |
| NAND Type | Samsung V-NAND TLC (3-bit per cell) |
| Controller / DRAM Cache | “Pascal” in-house controller; 4 GB LPDDR4 cache for the 4TB version |
| Physical size & weight | 80 mm × 22 mm × 2.3 mm; single sided; up to 9 g |
🚀Performance
| Workload | Spec / Rated Speed |
|---|---|
| Sequential Read | Up to 7,450 MB/s |
| Sequential Write | Up to 6,900 MB/s |
| Random Read (QD32, 4 KB) | Up to 1,600 IOPS |
| Random Write (QD32, 4 KB) | Up to 1,550 IOPS |
Power & Endurance / Reliability
| Parameter | Value |
|---|---|
| Endurance (TBW – Terabytes Written) | 2,400 TBW for the 4TB version |
| Warranty | 5 years limited warranty |
| Power Consumption | Idle (with APST): 55 MW Active (typical reads/writes): 6.5 W |
| Operating Temperature | 0°C to 70°C, non-operating –40°C to 85°C |
| Other durability | MTBF 1.5 million hours, shock/vibration rated etc. |
Pros / What Makes It Good
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Very high sequential speeds, close to maximum possible for PCIe 4.0 SSDs.
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Very good random I/O especially at higher queue depths — good for heavy workloads, loading many small files/games.
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Good endurance for 4TB drive (2400 TBW).
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Single-sided design: helpful in laptops or PS5 where thickness / space / heatsink clearance matter.
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Samsung’s firmware / software (Magician etc.) for monitoring, updates, encryption support, etc.
Cons / What to Watch
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Under sustained heavy writes past the SLC / cache buffer, write speeds will drop. The drive uses a write-cache (Turbo Write / dynamic/static) and once that is exceeded, performance dips.
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Power draw under load is non-trivial; in laptops or constrained cooling, might heat up / throttle. Good cooling or heatsink helps.
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Price: premium SSD — you get great performance, but cost/GB and competing models might offer better value depending on your use case.
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Requires a system that supports PCIe 4.0 ×4 interface to get full speed; older/motherboards or laptops with only PCIe 3 will bottleneck.
Reviews
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