Product comparison · 2 internal solid state drives

Samsung 840 120 GB 2.5" Serial ATA III vs Samsung SM843 120 GB 2.5" Serial ATA III

Key differences

Read speed
- 840 120 GB 2.5" Serial ATA III:530 MB/s
- SM843 120 GB 2.5" Serial ATA III:520 MB/s
Write speed
- 840 120 GB 2.5" Serial ATA III:130 MB/s
- SM843 120 GB 2.5" Serial ATA III:420 MB/s

Differences highlightedShow differences only

Comparison of 840, SM843
22 specifications	A Samsung 840 120 GB 2.5" Serial ATA III Model 840 View product	B Samsung SM843 120 GB 2.5" Serial ATA III Model SM843 View product
Features2 differ
Read speedDiffers	530 MB/s	520 MB/s
Write speedDiffers	130 MB/s	420 MB/s
Random read (4KB)Known for one	85000 IOPS	Unknown — not stated by the source
Random write (4KB)Known for one	32000 IOPS	Unknown — not stated by the source
Poweridentical
Operating voltageKnown for one	5 V	Unknown — not stated by the source
Power consumption (read)Known for one	0.15 W	Unknown — not stated by the source
Power consumption (write)Known for one	0.15 W	Unknown — not stated by the source
Weight & dimensionsidentical
WeightKnown for one	70 g	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)Known for one	0 - 70 °C	Unknown — not stated by the source
Storage temperature (T-T)Known for one	-40 - 85 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Storage relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Operating shockKnown for one	1500 G	Unknown — not stated by the source
Other featuresidentical
InternalKnown for one	Yes	Unknown — not stated by the source
Compatible operating systemsKnown for one	Windows 7 (32-bit / 64-bit), Vista, XP, MAC OSX, Linux	Unknown — not stated by the source
Connectivity technologyKnown for one	Wired	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.