Samsung SSD 840 / 840 Pro review: every model tested

Samsung 840 120GB/250GB/500GB and 840 Pro 128GB/256GB/512GB

By ,


840 Pro and 840

The 840 Pro is Samsung's flagship SSD series. For an in-depth review of the hardware inside, please have a look at our original Samsung 840 Pro review.  The 840 Pro is available in three capacities: 128 GB (£122), 256 GB (£206) and 512 GB (£432). That translates to £0.95 per GB, £0.80 per GB  and £0.84 per GB, respectively. They all come with Samsung's own data migration software, and five year's of warranty. Here are the specs:

General
 
BrandSamsungSamsungSamsung
Product name840 Series Pro 128GB840 Series Pro 256GB840 Series Pro 512GB
Product codeMZ-7PD128BWMZ-7PD256BWMZ-7PD512BW
DetailsProduct infoProduct infoProduct info
Specifications
Disc typeSSDSSDSSD
SSD typeMulti-level cellMulti-level cellMulti-level cell
Quoted capacity128 GB256 GB512 GB
Price per gigabyte£ 0,855 / GB£ 0,711 / GB£ 0,716 / GB
Rotation speed0 rpm0 rpm0 rpm
Cache256 MB512 MB512 MB
Size2.5 inch2.5 inch2.5 inch
Height6.6 mm6.6 mm6.6 mm
InterfaceSerial ATA 600Serial ATA 600Serial ATA 600
SSD controllerSamsung S4LN021X01Samsung S4LN021X01Samsung S4LN021X01
Power connectorSATASATASATA
Measured capacity119.2 GB238.5 GB476.9 GB
Native Command Queuing
TRIM support
Read530 MB/s540 MB/s540 MB/s
Write390 MB/s520 MB/s520 MB/s
Transistor size flash chips21 nm21 nm
Flash chip brandSamsungSamsungSamsung
Warranty5 year(s)5 year(s)5 year(s)

The 840's use the same controller, but instead have Triple Level Cell memory. To learn more about these flash chips, read our original Samsung 840 250 GB review. For normal use this chips are fine according to our calculations, but we'd be cautious if you make intensive use of your PC. The reason for this is that the lifespan can potentially be shorter than with traditional flash chips. It's also why they employ a lot of overprovisioning and have lower available capacities: 120 GB (£84), 250 GB (£147) and 500 GB (£358). That's £0.70 per GB, £0.59 per GB and £0.71 per GB, respectively. That's relatively affordable, but the difference isn't big enough compared to the previous generation, in our opinion. For a little more you can get the kit with 3.5-inch installation bracket, a USB-to-SATA cable and data migrations software. Here are the specs:

General
 
BrandSamsungSamsungSamsung
Product name840 Series 120GB (basic)840 Series 250GB (basic)840 Series 500GB (basic)
Product codeMZ-7TD120BWMZ-7TD250BWMZ-7TD500BW
DetailsProduct infoProduct infoProduct info
Specifications
Disc typeSSDSSDSSD
SSD typeTriple-level cellTriple-level cellTriple-level cell
Quoted capacity120 GB250 GB500 GB
Price per gigabyte£ 0,642 / GB$ 1,029 / GB£ 0,555 / GB
Rotation speed0 rpm0 rpm0 rpm
Cache512 MB512 MB512 MB
Size2.5 inch2.5 inch2.5 inch
Height6.6 mm6.6 mm6.6 mm
InterfaceSerial ATA 600Serial ATA 600Serial ATA 600
SSD controllerSamsung S4LN021X01Samsung S4LN021X01Samsung S4LN021X01
Power connectorSATASATASATA
Measured capacity111.8 GB232.9 GB465.8 GB
Native Command Queuing
TRIM support
Read530 MB/s540 MB/s540 MB/s
Write130 MB/s250 MB/s330 MB/s
Flash chip brandSamsungSamsungSamsung
Warranty3 year(s)3 year(s)3 year(s)


The Hardware.Info website uses cookies. Read our cookie policy.