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Comparison Samsung EVO Plus 100 Mb/s microSDXC UHS-I U3 512 GB vs A-Data XPG Gaming microSDXC A1 Card 512 GB

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Samsung EVO Plus 100 Mb/s microSDXC UHS-I U3 512 GB
A-Data XPG Gaming microSDXC A1 Card 512 GB
Samsung EVO Plus 100 Mb/s microSDXC UHS-I U3 512 GBA-Data XPG Gaming microSDXC A1 Card 512 GB
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from 5 852 ₴
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Full compliance with the claimed speed characteristics. All-protected execution.
TypemicroSDmicroSD
Storage512 GB512 GB
Specs
Speed class1010
UHS classUHS-I Class 3 (U3)UHS-I Class 3 (U3)
Video recording classV30V30
Application classA1
Read speed100 MB/s100 MB/s
Write speed90 MB/s85 MB/s
Adapter included
 /depending on configuration/
Added to E-Catalogmay 2019april 2019

Application class

Speed class when working with applications to which the memory card corresponds.

When working with applications that use a memory card (for example, mobile games), information is written and read not in a continuous stream, as when recording video or copying data, but in separate small fragments, and from random areas in the drive’s memory (the so-called random write/read). So a high-class video recording (see above) does not always mean good flow Rate when working with demanding games and other resource-intensive programs. Therefore, the characteristics of memory cards began to separately indicate the speed class for applications.

The key indicator for assigning a particular class is the minimum number of IOPS (input/output operations per second) that the media can provide in random write and read mode. Nowadays, the following classes are relevant:

A1 — at least 1500 IOPS for reading and 500 IOPS for writing;

A2 — at least 4000 IOPS and 2000 IOPS, respectively.

The continuous recording speed (for example, when recording video) in both cases must be at least 10 MB/s (often it is higher - see “Speed class”, “Video recording class”).

In the future, we can expect the emergence of new, more productive classes for applications. We also note that this parameter significantly affects the price of the card.

Write speed

The maximum speed for writing data to a memory card.

High write speed is important for tasks that involve storing large amounts of data in a limited amount of time. However, note that this paragraph indicates the theoretical maximum speed for perfect conditions; in fact, this value can be noticeably lower. Therefore, the characteristics of memory cards also indicate the minimum guaranteed write speeds in different modes — the general speed class, the UHS class, the video recording class and/or the class for applications. All of them are described in more detail above. However, you can also evaluate the capabilities of the carrier by the overall speed: other things being equal, a card with a higher theoretical speed will work faster in fact.

As for specific values, speeds from 4 MB / s and from 6 MB / s are practically not found nowadays, from 10 MB / s and from 16 MB / s can be called average indicators, from 50 MB / s — above average, and the fastest models have a maximum write speed of 100 Mbps or more.

Adapter included

An additional adapter is included with the memory card.

The adapter is a device with which the card can be installed in a non-native format card reader. Nowadays, microSD cards are mainly equipped with such a device — adapters are designed to install such media in a slot for a full-size SD card. This is convenient primarily for exchanging data between portable gadgets like a smartphone / tablet and larger equipment like PCs and laptops — for example, to copy pictures from a smartphone camera to a computer or music from a computer to a smartphone.
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