Product comparison · 2 internal solid state drives

Samsung 840 EVO vs Samsung 850 PRO

21specifications compared
10differ
11identical
10known for one product only

Key differences

SSD capacity
- 840 EVO:120 GB
- 850 PRO:128 GB
Memory type
- 840 EVO:MLC
- 850 PRO:3D MLC
Read speed
- 840 EVO:540 MB/s
- 850 PRO:550 MB/s
Write speed
- 840 EVO:410 MB/s
- 850 PRO:470 MB/s
Random read (4KB)
- 840 EVO:94000 IOPS
- 850 PRO:100000 IOPS
Random write (4KB)
- 840 EVO:35000 IOPS
- 850 PRO:90000 IOPS
Width
- 840 EVO:69.8 mm
- 850 PRO:100 mm
Depth
- 840 EVO:100 mm
- 850 PRO:6.8 mm

Side by side

Differences highlightedShow differences only

Comparison of 840 EVO, 850 PRO
31 specifications	A Samsung 840 EVO View product	B Samsung 850 PRO View product
Features6 differ
SSD capacityDiffers	120 GB	128 GB
SSD form factor	2.5"	2.5"
Interface	Serial ATA III	Serial ATA III
Memory typeDiffers	MLC	3D MLC
Data transfer rate	6 Gbit/s	6 Gbit/s
Read speedDiffers	540 MB/s	550 MB/s
Write speedDiffers	410 MB/s	470 MB/s
Random read (4KB)Differs	94000 IOPS	100000 IOPS
Random write (4KB)Differs	35000 IOPS	90000 IOPS
S.M.A.R.T. support	Yes	Yes
TRIM support	Yes	Yes
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	2000000 h
TBW ratingKnown for one	Unknown — not stated by the source	150
Storage drive buffer sizeKnown for one	256 MB	Unknown — not stated by the source
Windows operating systems supportedKnown for one	Yes	Unknown — not stated by the source
Poweridentical
Power consumption (read)Known for one	Unknown — not stated by the source	3.3 W
Power consumption (idle)Known for one	Unknown — not stated by the source	0.4 W
Weight & dimensions3 differ
WidthDiffers	69.8 mm	100 mm
DepthDiffers	100 mm	6.8 mm
HeightDiffers	7 mm	69.8 mm
WeightKnown for one	68 g	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)	0 - 70 °C	0 - 70 °C
Storage temperature (T-T)	-40 - 85 °C	-40 - 85 °C
Operating relative humidity (H-H)	5 - 95%	5 - 95%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Non-operating vibrationKnown for one	Unknown — not stated by the source	20 G
Operating shock	1500 G	1500 G
Non-operating shockKnown for one	Unknown — not stated by the source	1500 G
Other features1 differ
Product colourDiffers	Titanium	Black
Internal	Yes	Yes
Operating temperature (T-T)Known for one	Unknown — not stated by the source	32 - 158 °F

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.

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