SDHC vs SDXC. What Makes Them Different?

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SDHC vs SDXC. What Makes Them Different?

One question that probably floating on your mind regarding memory card: What is the difference between SDHC and SDXC?. This is actually a very basic thing you need to know if you want to buy a new memory card, but if you didn’t know yet, no problem. This article will give you some insight.

You will find those letters on the body of your memory card. Those letters are used to differentiate the capacity range of memory cards. Based on the capacity, memory cards are grouped into three types: SDSC, SDHC and SDXC. Yes right, in addition to SDHC and SDXC, there is also SDSC. But before stepping further, let’s start with a the very basic thing: SD.

SD stands for Secure Digital. It’s a type of non-volatile memory card developed by an organization called SD Card Association. It was intended for portable devices. And yes, nearly all type of portable devices use SD as the storage medium today. The two letters after “SD” indicate the storage capacity range of the SD cards. The letters “HC” on “SDHC” stands for High Capacity, while “XC” on SDXC stands for eXtended Capacity. The storage capacity of SDHC ranging from 2 GB to 32 GB, while SDXC ranging from 32 GB to 2 TB.

The conclusion is, what makes SDHC different to SDXC is the storage capacity range.

  • SDSC: 1 MB to 2 GB
  • SDHC: 2 GB to 32 GB
  • SDXC: 32 GB to 2 TB

Is there a different in terms of performance?

No. There is no relationship between capacity and and performance (speed). The speed of an SD card is determined by its speed class, which is divided into four classes: Class 2, Class 4, Class 6 and Class 10 (you can refer to this page to learn more). But typically, the more spacious the storage capacity of an SD card, the higher speed class its has.

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