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WD BLACK SN850 NVMe SSD M.2 1TB vs. Samsung 980 Pro Series MZ-V8P1T0BW 1TB + 8

External connection
No
No
No
No
No
Yes
No
No
No
No
Firewire
No
Thunderbolt
No
USB
Yes
Type of USB connector
USB (Type C)
USB version
3.2 (Gen 2)
Internal connection
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Connection
M.2
M.2
M.2
M.2
M.2
M.2
S-ATA
M.2
S-ATA
Interface
PCIe Gen4 x4 NVMe
PCIe Gen4 x4 NVMe
PCIe Gen3 x4 NVMe
PCIe Gen4 x4 NVMe
PCIe Gen3 x4 NVMe
PCIe Gen3 x4 NVMe
S-ATA 6Gb/s
PCIe Gen3 x4 NVMe
S-ATA 6Gb/s
Dimensions (WxHxD)
Depth
22 mm
80.15 mm
80 mm
80 mm
80 mm
85 mm
80 mm
100 mm
22 mm
100 mm
Height
2.38 mm
2.38 mm
2.4 mm
2.38 mm
2.4 mm
8 mm
2.38 mm
7 mm
2.1 mm
6.8 mm
Width
80 mm
22.15 mm
22 mm
23.4 mm
22 mm
57 mm
22 mm
70 mm
80 mm
69.85 mm
Form factor
2.5 inches
2.5 inches
2.5 inches
M.2 form factor
M.2 Type 2280
M.2 Type 2280
M.2 Type 2280
M.2 Type 2280
M.2 Type 2280
M.2 Type 2280
M.2 Type 2280
Product weight
7.5 g
9 g
8 g
7.5 g
8 g
58 g
6.5 g
38 g
7 g
45 g
Features
TRIM support
TRIM support, SED/FDE (disk encryption)
TRIM support, SED/FDE (disk encryption)
TRIM support
TRIM support, SED/FDE (disk encryption)
TRIM support, SED/FDE (disk encryption)
4KB random read
1000000 IOPS
1000000 IOPS
620000 IOPS
1000000 IOPS
600000 IOPS
345000 IOPS
95000 IOPS
98000 IOPS
4KB random write
720000 IOPS
1000000 IOPS
560000 IOPS
710000 IOPS
550000 IOPS
385000 IOPS
90000 IOPS
88000 IOPS
Cache memory
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Cache size
1024 MB
1024 MB
2048 MB
2048 MB
1024 MB
Controller chip
Samsung S4LV003
Samsung S4LR020
Samsung S4LR020
Silicon Motion SM2258
Maximum read speed
7000 MB/s
7000 MB/s
3500 MB/s
7000 MB/s
3500 MB/s
1050 MB/s
2400 MB/s
560 MB/s
2100 MB/s
560 MB/s
Maximum write speed
5300 MB/s
5000 MB/s
3300 MB/s
5100 MB/s
3300 MB/s
1000 MB/s
1950 MB/s
510 MB/s
1700 MB/s
530 MB/s
Size
1000 GB
1000 GB
2000 GB
2000 GB
1000 GB
1000 GB
1000 GB
500 GB
2000 GB
1000 GB
Price/GB
0.14 £/GB
0.14 £/GB
0.11 £/GB
0.13 £/GB
0.12 £/GB
0.08 £/GB
0.07 £/GB
0.09 £/GB
0.07 £/GB
0.09 £/GB
TBW (Terabytes written)
600
600
1200
1200
600
600
180
480
600
Type of flash memory
3D TLC
3D TLC
3D TLC
3D TLC
3D TLC
TLC
TLC
3D TLC
3D TLC
Manufacturer warranty
5 Years
5 Years
5 Years
5 Years
5 Years
3 Years
5 Years
5 Years
3 Years
5 Years
Operational Power Consumption (min-max)
0.8 - 6.8 W
6.2 W
5 - 6 W
6 - 9 W
0.2 - 4.9 W
2.5 - 4 W
Power consumption (standby)
0.5 W
0.04 W
0.03 W
0.03 W
0.05 W
0.03 W