Intel 520 VS Samsung 840 Pro

Compare any two SSD:

Intel 520 vs Samsung 840 Pro


Intel ssdIntel’s 520 series solid state drives are based on the popular SandForce SF-2281 controller, but with a proprietary firmware developed and validated by Intel. Intel uses its own 25 nm synchronous NAND Flash modules and the drive is capable of sequential speeds of up to 550 MB/s and 520 MB/s (read/write). Unlike the 320, 330 and 335 drives, the 520 is targeted at professional and enthusiast users and offers an extended warranty period of 5 years instead of 3 years.

samsung_840_series_ssdIn comparison, Samsung’s 840 Pro series uses the manufacturer’s proprietary MDX controller and its rated maximum transfer rates (sequential) are 540 MB/s (read) and 520 MB/s (write). Random read IOPS is rated at 100,000 and random write IOPS at 90,000. The 840 Pro is available in capacities ranging from 64 GB up to 512 GB.

Power Usage and Theoretical Benchmarks

Sequential Read

Intel 520 550  MB/s
Samsung 840 Pro 540  MB/s
Difference:10 MB/s (1.82%)

Sequential Write

Intel 520 520  MB/s
Samsung 840 Pro 520  MB/s
Difference: 0 MB/s (100%)

Random Write IOPS

Intel 520 80000  IOPS
Samsung 840 Pro 90000  IOPS
Difference: 10000 IOPS(88.89%)

Power Consumption Idle

Intel 520 600  mW
Samsung 840 Pro 310  mW
Difference: 290 IOPS (48.33%)

Power Consumption Active

Intel 520 850  mW
Samsung 840 Pro 3100  mW
Difference: 2250 IOPS (72.58%)

Please note that the comparisons above are not benchmarks based on tried and tested performance, but on drive data and specifications from the corresponding SSD manufacturer. The results in real-world scenarios may differ for a variety of reasons including hardware and software environment.

Price Comparison


Model Intel 520 Samsung 840 Pro
Year 2012 2012
Production Process 25nm 21nm
DRAM Cache N/A 512 MB
Interface SATA 6Gb/s SATA 6Gb/s
Form Factor 2.5" 2.5"
Sequential Read 550 MB/s 540 MB/s
Sequential Write 520 MB/s 520 MB/s
Random Write IOPS 80000 IOPS 90000 IOPS
Power Consumption Idle 600 mW 310 mW
Power Consumption Active 850 mW 3100 mW
Warranty 5 years 5 years
MTBF 1,200,000 hours 1,500,000 hours