Samsung 870 Evo 4TB 2.5" SATA III 6GB/s V-NAND SSD MZ-77E4T0BW
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4TB 2.5-inch SATA client SSD
Samsung 870 EVO 4TB MZ-77E4T0BW 2.5-inch SATA SSD
The Samsung 870 EVO 4TB MZ-77E4T0BW is a 4TB 2.5-inch client SSD rated up to 560MB/s sequential read and 530MB/s sequential write, with 98K/88K QD32 random read/write IOPS, 4GB DRAM cache and 2,400TBW endurance.
- 4TB
- 560/530MB/s
- 98K/88K IOPS
- SATA 6Gb/s
- 2,400TBW
- 5-year limited warranty
| Capacity |
4TB |
| Sequential performance |
Up to 560MB/s read; 530MB/s write |
| Interface |
SATA 6Gb/s |
| Endurance |
2,400TBW |
870 EVO SATA storage for compatible client systems
The Samsung 870 EVO 4TB MZ-77E4T0BW combines Samsung V-NAND, the MKX controller and 4GB LPDDR4 cache in a 2.5-inch, 6.8mm SATA design. Its exact capacity, endurance, power and sustained-write figures are stated separately to help buyers choose the correct 870 EVO SKU.
Up to 560MB/s read
Samsung rates the drive up to 560MB/s sequential read under its published test conditions.
Up to 530MB/s write
Sequential write is rated up to 530MB/s with Intelligent TurboWrite; after the intelligent turbowrite region, samsung specifies 530mb/s sequential write for this capacity group.
98K/88K random IOPS
QD32 random performance is rated up to 98K read and 88K write IOPS.
4GB LPDDR4 cache
This exact 4TB model includes 4GB of LPDDR4 DRAM cache.
2,400TBW endurance
Samsung specifies 2,400TBW, with warranty coverage governed by the stated time period or endurance limit.
Data-security support
Samsung lists AES 256-bit full-disk encryption, TCG Opal 2.0 and IEEE1667 Encrypted Drive.
Who is the Samsung 870 EVO 4TB MZ-77E4T0BW best for?
A strong choice for
- Compatible desktops and laptops with a 2.5-inch SATA bay
- Users who need 4TB nominal SATA SSD capacity
- Client-PC boot, application and everyday storage upgrades
- Replacing a supported 2.5-inch SATA hard drive or SSD
- Workloads that fit the published client-drive performance and endurance profile
Consider another model if you need
- Your system lacks a compatible 2.5-inch SATA connection
- You require NVMe performance rather than SATA performance
- You need endurance beyond 2,400TBW
- You require a data-centre or enterprise SSD profile
Key specifications
| Official model code |
MZ-77E4T0BW |
| Capacity |
4TB |
| Usage application |
Client PCs |
| Form factor |
2.5-inch |
| Interface |
SATA 6Gb/s; backwards-compatible with SATA 3Gb/s and 1.5Gb/s |
| Controller |
Samsung MKX controller |
| NAND |
Samsung V-NAND 3-bit MLC |
| DRAM cache |
4GB |
| Sequential read/write |
Up to 560/530MB/s |
| QD32 random read/write |
Up to 98K/88K IOPS |
| Endurance |
2,400TBW |
| Dimensions |
100 × 69.85 × 6.8 mm |
| Warranty |
5 years limited or 2,400TBW, whichever comes first |
Full technical specifications
Hardware and performance
| Series |
Samsung 870 EVO |
| Official model code |
MZ-77E4T0BW |
| Capacity |
4TB |
| Usage application |
Client PCs |
| Form factor |
2.5-inch |
| Interface |
SATA 6Gb/s; compatible with SATA 3Gb/s and 1.5Gb/s |
| Controller |
Samsung MKX controller |
| NAND flash memory |
Samsung V-NAND 3-bit MLC |
| DRAM cache memory |
4GB |
| Sequential read |
Up to 560MB/s |
| Sequential write |
Up to 530MB/s with Intelligent TurboWrite |
| Sequential write after TurboWrite region |
530MB/s |
| Random read, 4KB QD1 |
Up to 13K IOPS |
| Random write, 4KB QD1 |
Up to 36K IOPS |
| Random read, 4KB QD32 |
Up to 98K IOPS |
| Random write, 4KB QD32 |
Up to 88K IOPS |
Physical, power and reliability
| Dimensions |
100 × 69.85 × 6.8 mm |
| Idle power, DIPM on |
35mW |
| Average active read power |
2.2W |
| Average active write power |
2.5W |
| Device Sleep power |
6.5mW |
| Operating temperature |
0°C to 70°C |
| Non-operating temperature |
-40°C to 85°C |
| Humidity |
5% to 95% non-condensing |
| Non-operating shock |
1,500G, 0.5ms, 3 axis |
| Non-operating vibration |
20 to 2,000Hz, 20G |
| MTBF |
1.5 million hours |
Features, security and warranty
| TRIM |
Supported; operating-system support required |
| Garbage collection |
Supported |
| S.M.A.R.T. |
Supported |
| Write acceleration |
Samsung Intelligent TurboWrite |
| AES full-disk encryption |
256-bit |
| TCG Opal |
Version 2.0 |
| Encrypted Drive |
IEEE1667 |
| Endurance |
2,400TBW |
| Warranty period |
5 years limited |
| Warranty basis |
5 years limited or 2,400TBW, whichever comes first |
| Performance condition |
Varies with firmware, host hardware, software and configuration |
| Nominal capacity note |
Actual usable capacity is lower after formatting and system use |
Frequently asked questions about the Samsung 870 EVO 4TB MZ-77E4T0BW
What is the Samsung 870 EVO 4TB MZ-77E4T0BW?
It is a 4TB 2.5-inch SATA SSD designed for compatible client-PC workloads and responsive everyday client storage.
How fast is the MZ-77E4T0BW?
Samsung rates it up to 560MB/s sequential read and 530MB/s sequential write; actual performance varies by system and workload.
What random performance does the MZ-77E4T0BW provide?
Samsung specifies up to 98K QD32 random read and 88K QD32 random write IOPS.
What interface does the MZ-77E4T0BW use?
It uses SATA 6Gb/s and is compatible with SATA 3Gb/s and SATA 1.5Gb/s interfaces.
How much DRAM cache does the MZ-77E4T0BW include?
Samsung specifies 4GB LPDDR4 DRAM cache for this 4TB model.
What endurance applies to the MZ-77E4T0BW?
Samsung specifies 2,400TBW for this exact model.
What security features does the MZ-77E4T0BW support?
Samsung lists AES 256-bit full-disk encryption, TCG Opal 2.0 and IEEE1667 Encrypted Drive.
What is the sustained write figure for the MZ-77E4T0BW?
After the Intelligent TurboWrite region, Samsung specifies 530MB/s sequential write for this capacity group.
What are the dimensions of the MZ-77E4T0BW?
Samsung specifies 100 × 69.85 × 6.8 mm.
What warranty applies to the MZ-77E4T0BW?
Samsung specifies 5 years limited or 2,400TBW, whichever comes first, subject to its warranty terms.
Important information:
- Confirm a compatible 2.5-inch SATA bay, connector, power arrangement and physical clearance before purchase.
- Published performance is an up-to figure and varies with firmware, host hardware, software, workload and configuration.
- After the Intelligent TurboWrite region, Samsung specifies 530MB/s sequential write for this capacity group.
- Actual usable capacity is lower than the labelled capacity after formatting and system use.
