WD_BLACK SN770
Score: 80/100
Samsung 990 PRO
Score: 81/100Rankings
The Samsung 990 PRO 1TB is a high-performance PCIe 4.0 NVMe SSD delivering up to 7,450 MB/s read and 6,900 MB/s write speeds with strong security features. Its heatsink-less design and limited pSLC cache can limit sustained heavy workloads. Best suited for gamers, content creators, and professionals who need maximum PCIe 4 throughput on desktops or laptops with adequate cooling.
The WD_BLACK SN770 2TB is a DRAM-less PCIe Gen4 SSD delivering up to 5150 MB/s reads and 4850 MB/s writes with a robust 1200 TBW endurance. Its budget-friendly price and low power draw come at the cost of no onboard DRAM and no included heatsink, which can limit sustained performance under heavy loads. Ideal for gamers and mainstream builders seeking fast sequential performance without the premium price.
| Attribute | | |
|---|---|---|
2,000 GBbest | 1,024 GB | |
5,150 MB/s | 7,450 MB/sbest | |
4,850 MB/s | 6,900 MB/sbest | |
650,000 IOPS | 1,200,000 IOPSbest | |
800,000 IOPS | 1,550,000 IOPSbest | |
1,200 TBbest | 600 TB | |
— | 1,500,000 hoursbest | |
0 MB | 1,024 MBbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Connectivity(1) | ||
Interface | PCIe Gen4 x4 NVMe 1.4 | PCIe 4.0 x4 |
Performance(5) | ||
Sequential Read Speed (MB/s) | 5150 MB/s | 7450 MB/s |
Sequential Write Speed (MB/s) | 4850 MB/s | 6900 MB/s |
Random Read IOPS (4K) (IOPS) | 650000 IOPS | 1200000 IOPS |
Random Write IOPS (4K) (IOPS) | 800000 IOPS | 1550000 IOPS |
DRAM Cache (MB) | 0 MB | 1024 MB |
Storage(1) | ||
Storage Capacity (GB) | 2000 GB | 1024 GB |
Reliability(1) | ||
Total Bytes Written (Endurance) (TB) | 1200 TB | 600 TB |
Power & Reliability(1) | ||
Idle Power Consumption (W) | 0.0033 W | 0.05 W |
Design & Build(2) | ||
Weight (g) | 5.5 g | 9.1 g |
Dimensions (L×W×H) (mm) | 80x22x2.4 mm mm | 80.3×22.1×2.3 mm mm |
Products in the top-left offer the best value (high score, low price).
Professional reviewers regard the WD_BLACK SN770 as a compelling budget-friendly PCIe Gen4 SSD that punches above its weight class, delivering flagship-like sequential speeds and solid endurance while keeping costs low. They commend its value, fast load times, and low power draw, but warn that the DRAM-less design and lack of a heatsink could limit sustained performance in demanding scenarios.
General users praise the drive for its rapid game loading, smooth everyday performance, and easy installation, seeing it as a solid value for a 2 TB capacity. Recurring concerns revolve around thermal throttling without a heatsink and occasional slowdowns during long write operations, especially for those expecting flagship-level consistency.
Professional reviewers commend the 990 PRO for its exceptional speed, gaming-optimized random performance, and strong reliability, while noting the smaller DRAM cache and lack of a heatsink as potential drawbacks under heavy sustained loads.
Everyday users praise the drive's blazing speed and security, but note concerns about the smaller DRAM cache and possible throttling without a heatsink.
“Fast game loading and smooth performance in PCs/PlayStation 5”
