Compare any two Solid State Drives:


Samsung 850 Pro 256GB vs SanDisk X400 1TB

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Specification Charts


X400 1TB 1024 GB
850 Pro 256GB 256 GB
Difference: 768 (300%)

Random Read

850 Pro 256GB 100000 IOPS
X400 1TB 95000 IOPS
Difference: 5000 (5%)

Random Write

850 Pro 256GB 90000 IOPS
X400 1TB 75000 IOPS
Difference: 15000 (20%)

Sequential Read

850 Pro 256GB 550 MB/sec
X400 1TB 545 MB/sec
Difference: 5 (1%)

Sequential Write

850 Pro 256GB 520 MB/sec
X400 1TB 520 MB/sec
Difference: 0 (0%)


X400 1TB 320 TB
850 Pro 256GB 150 TB
Difference: 170 (113%)

Price Comparison

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850 Pro 256GB

X400 1TB

Please note that the price comparisons are based on search keywords - sometimes it might show ssds with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.


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Model 850 Pro 256GB X400 1TB
Manufacturer Samsung SanDisk
NAND Samsung 2nd Gen 86Gbit 40nm MLC V-NAND TLC NAND
Form Factor 2.5" 2.5"
Capacity 256 GB 1024 GB
Cache 512 MB (N/A) MB
Sequential Read 550 MB/s 545 MB/s
Sequential Write 520 MB/s 520 MB/s
Random Read 100000 IOPS 95000 IOPS
Random Write 90000 IOPS 75000 IOPS
Interface SATA III 6Gb/s SATA III 6Gb/s
Controller Samsung 3-core MEX controller Marvell 88SS1074
Date Released 2014 2016
Endurance 150 TB 320 TB
Notes 10 years limited warranty AES 256-bit Full Disk Encryption (FDE) TCG/Opal v2.0, Encrypted Drive (IEEE1667) Warranty 5 years