When it comes to choosing the right memory card for your camera, smartphone, or other devices, the options can be overwhelming. Two of the most popular types of memory cards are SDHC (Secure Digital High Capacity) and SDXC (Secure Digital eXtended Capacity). While both types of cards have their own strengths and weaknesses, one of the most significant differences between them is their speed and performance. In this article, we’ll delve into the world of SDHC and SDXC cards, exploring their differences, and ultimately, determining which one is the fastest.
Understanding SDHC and SDXC Cards
Before we dive into the speed and performance of SDHC and SDXC cards, it’s essential to understand what they are and how they differ.
SDHC Cards
SDHC cards are a type of memory card that was introduced in 2006. They have a storage capacity of up to 32GB and are designed to work with devices that support the SDHC standard. SDHC cards use the FAT32 file system, which is a widely supported format that allows for easy compatibility with various devices.
SDXC Cards
SDXC cards, on the other hand, are a more recent development, introduced in 2009. They have a much higher storage capacity, ranging from 64GB to 2TB, and are designed to work with devices that support the SDXC standard. SDXC cards use the exFAT file system, which is a more modern format that allows for larger storage capacities and faster data transfer speeds.
Speed and Performance: SDHC vs SDXC
Now that we’ve covered the basics of SDHC and SDXC cards, let’s talk about their speed and performance.
Bus Speed
One of the key factors that determine the speed of a memory card is its bus speed. The bus speed refers to the rate at which data is transferred between the card and the device. SDHC cards typically have a bus speed of up to 25MB/s, while SDXC cards can have bus speeds of up to 312MB/s.
UHS Speed Class
Another factor that affects the speed of a memory card is its UHS (Ultra High Speed) speed class. The UHS speed class is a rating system that measures the card’s ability to handle high-speed data transfer. SDHC cards typically have a UHS speed class of UHS-I, which has a minimum write speed of 10MB/s. SDXC cards, on the other hand, can have UHS speed classes of UHS-I, UHS-III, or even V30, which have minimum write speeds of 10MB/s, 30MB/s, and 30MB/s, respectively.
Video Speed Class
If you’re planning to use your memory card for video recording, you’ll want to look for a card with a high video speed class. The video speed class is a rating system that measures the card’s ability to handle high-quality video recording. SDHC cards typically have a video speed class of V6 or V10, which are suitable for standard definition and high definition video recording, respectively. SDXC cards, on the other hand, can have video speed classes of V30, V60, or even V90, which are suitable for 4K, 8K, and high-frame-rate video recording, respectively.
Real-World Performance: SDHC vs SDXC
Now that we’ve covered the theoretical differences between SDHC and SDXC cards, let’s take a look at their real-world performance.
File Transfer Speeds
In terms of file transfer speeds, SDXC cards are significantly faster than SDHC cards. According to a study by the SD Association, SDXC cards can transfer files at speeds of up to 312MB/s, while SDHC cards top out at around 25MB/s.
Video Recording
When it comes to video recording, SDXC cards are again the clear winner. With their higher video speed classes and faster bus speeds, SDXC cards can handle high-quality video recording with ease. SDHC cards, on the other hand, may struggle to keep up with demanding video recording applications.
Conclusion
In conclusion, when it comes to speed and performance, SDXC cards are the clear winner. With their faster bus speeds, higher UHS speed classes, and higher video speed classes, SDXC cards are ideal for demanding applications such as 4K video recording and high-speed file transfer. SDHC cards, on the other hand, are better suited for standard definition video recording and casual file transfer.
Recommendations
If you’re in the market for a new memory card, we recommend choosing an SDXC card with a high UHS speed class and video speed class. Some popular options include:
- SanDisk Extreme PRO SDXC U3 V30 128GB
- Lexar Professional 2000x SDXC U3 V30 128GB
- Sony SF-G Tough SDXC U3 V30 128GB
Ultimately, the choice between SDHC and SDXC cards depends on your specific needs and applications. If you’re looking for a fast and reliable memory card for demanding applications, SDXC is the way to go.
What is the main difference between SDHC and SDXC memory cards?
The primary difference between SDHC (Secure Digital High Capacity) and SDXC (Secure Digital eXtended Capacity) memory cards lies in their storage capacity and compatibility. SDHC cards have a maximum storage capacity of 32 GB, while SDXC cards can store up to 2 TB of data. This significant difference in capacity makes SDXC cards more suitable for applications that require large storage, such as 4K video recording and high-resolution photography.
Another key difference is compatibility. SDHC cards are compatible with most devices that support SD cards, including older models. In contrast, SDXC cards require devices that specifically support the SDXC standard, which may not be the case for older devices. Therefore, it’s essential to check the device’s compatibility before purchasing an SDXC card.
What are the speed classes of SDHC and SDXC cards?
Both SDHC and SDXC cards have different speed classes, which determine their performance in various applications. The speed classes for SDHC and SDXC cards are Class 2, Class 4, Class 6, and Class 10. Class 2 is the slowest, while Class 10 is the fastest. Additionally, some SDXC cards also support higher speed classes, such as U1, U3, and V30, which are designed for more demanding applications like 4K video recording.
The speed class of an SD card is crucial in determining its performance in specific applications. For example, a Class 10 SDHC card may be sufficient for standard photography, but a U3 or V30 SDXC card may be required for 4K video recording or high-speed burst mode photography. Choosing the right speed class ensures that the card can handle the demands of the application.
Can I use an SDXC card in a device that only supports SDHC?
It’s generally not recommended to use an SDXC card in a device that only supports SDHC. SDXC cards require devices that specifically support the SDXC standard, and using an SDXC card in an SDHC-only device may result in compatibility issues or reduced performance. The device may not be able to recognize the SDXC card or may only be able to access a limited portion of its capacity.
If you need to use a high-capacity card in a device that only supports SDHC, it’s best to check with the manufacturer for compatibility or consider upgrading to a device that supports SDXC. Alternatively, you can use an SDHC card with a lower capacity, which should be compatible with the device.
What are the benefits of using an SDXC card over an SDHC card?
The main benefits of using an SDXC card over an SDHC card are its higher storage capacity and faster speeds. SDXC cards can store up to 2 TB of data, making them ideal for applications that require large storage, such as 4K video recording and high-resolution photography. Additionally, SDXC cards support higher speed classes, such as U1, U3, and V30, which enable faster data transfer and improved performance.
Using an SDXC card can also simplify storage management, as you can store more files on a single card. This can be particularly useful for professionals who need to capture large amounts of data, such as photographers and videographers. However, it’s essential to ensure that the device supports SDXC cards and can take advantage of their higher speeds and capacities.
How do I choose the right SDHC or SDXC card for my device?
To choose the right SDHC or SDXC card for your device, consider the device’s compatibility, the type of application, and the required storage capacity. Check the device’s manual or manufacturer’s website to determine the supported SD card types and speeds. For applications that require large storage, such as 4K video recording, choose an SDXC card with a high storage capacity and fast speed class.
Additionally, consider the card’s durability and reliability, as well as its price. Look for cards from reputable manufacturers that offer high-quality and reliable performance. It’s also essential to check the card’s warranty and customer support in case you encounter any issues.
Can I use an SDHC card for 4K video recording?
While it’s technically possible to use an SDHC card for 4K video recording, it’s not recommended. SDHC cards have limited storage capacity, typically up to 32 GB, which may not be sufficient for 4K video recording. Additionally, SDHC cards may not support the fast speeds required for 4K video recording, which can result in dropped frames, corrupted files, or other performance issues.
For 4K video recording, it’s recommended to use an SDXC card with a high storage capacity (at least 64 GB) and a fast speed class (such as U3 or V30). This ensures that the card can handle the high data transfer rates required for 4K video recording and provides sufficient storage for your footage.
Are SDXC cards more expensive than SDHC cards?
Generally, SDXC cards are more expensive than SDHC cards, especially for high-capacity models. The higher storage capacity and faster speeds of SDXC cards require more advanced technology and manufacturing processes, which increases their cost. However, the price difference between SDHC and SDXC cards has decreased over time, making SDXC cards more affordable for consumers.
When considering the cost of an SDXC card, it’s essential to weigh the benefits of its higher storage capacity and faster speeds against the additional cost. If you require large storage and fast performance, an SDXC card may be a worthwhile investment. However, if you only need a card for standard photography or other applications with lower storage requirements, an SDHC card may be a more cost-effective option.