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Comparison Silicon Power Ace A55 SP128GBSS3A55S25 128 GB vs Silicon Power Slim S56 SP120GBSS3S56B25 120 GB

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Silicon Power Ace A55 SP128GBSS3A55S25 128 GB
Silicon Power Slim S56 SP120GBSS3S56B25 120 GB
Silicon Power Ace A55 SP128GBSS3A55S25 128 GBSilicon Power Slim S56 SP120GBSS3S56B25 120 GB
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Placementinternalinternal
Size128 GB120 GB
Form factor2.5"2.5"
InterfaceSATA 3SATA 3
Technical specs
ControllerSilicon Motion SM2258XTRealtek RayMX RM1135
Memory type3D TLC NAND3D TLC NAND
Write speed420 MB/s530 MB/s
Read speed550 MB/s560 MB/s
Shockproof1500 G1500 G
MTBF1.5 m h1.5 m h
Manufacturer's warranty3 years3 years
General
TRIM
Size100x70x7 mm100x70x7 mm
Weight63 g41 g
Added to E-Catalogfebruary 2018december 2016
Glossary

Size

Nominal drive capacity. This parameter directly determines not only the amount of data that can fit on the device, but also its cost; many SSD models even come in several versions that differ in capacity. Therefore, when choosing, it is worth considering the real needs and features of the application — otherwise you can overpay a significant amount for volumes that are not needed in fact.

In terms of actual values, a capacity of 120 GB or less is considered small these days. This can also be equated with a 240 GB SSD. Average values are already considered 500 GB, increased — 1 TB(in the range of which SSDs fall 400 and 800 GB). And the most capacious modern SSDs can accommodate 2 TB, 4 TB and even more.

Controller

Model of the controller installed in the SSD.

The controller is a control circuit, which, in fact, ensures the exchange of information between the memory cells and the computer to which the drive is connected. The capabilities of a particular SSD module (in particular, read and write speed) largely depend on this particular scheme. Knowing the controller model, you can find detailed data on it and evaluate the capabilities of the drive. For simple everyday use, this information is usually not needed, but for professionals and enthusiasts (modders, overclockers) it can come in handy.

Nowadays, high-end controllers are produced mainly under such brands: InnoGrit, Maxio, Phison, Realtek, Silicon Motion, Samsung.

Write speed

The highest speed in write mode characterizes the speed with which the module can receive information from a connected computer (or other external device). This speed is limited both by the connection interface (see "Connector"), and by the characteristics of the device of the SSD itself.

Read speed

The highest data exchange rate with a computer (or other external device) that the drive can provide in read mode; in other words — the highest speed of information output from the drive to an external device. This speed is limited both by the connection interface (see "Connector"), and by the characteristics of the device of the SSD itself. Its values can vary from 100 – 500 MB / s in the slowest models to 3 Gb / s and higher in the most advanced ones.

TRIM

Module support for the TRIM command.

A feature of the operation of SSD modules is that when deleting data in the normal mode (without using TRIM), changes are made only to the “table of contents” of the drive: certain cells are marked as empty and ready for new information to be written. However, the old information is not deleted from them, and when writing new data, you actually have to overwrite it — this significantly slows down the speed of work. The TRIM command is designed to correct the situation: when it arrives, the drive controller checks if the cells marked as empty are empty and cleans them if necessary.

Of course, this function must be supported not only by the drive, but also by the system, however, the ability to work with TRIM is built into most popular modern operating systems.
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