Reviews |Lexar Professional CFexpress Type B Card SILVER Series review

Lexar Professional CFexpress Type B Card SILVER Series review

Perfect for hybrid shooters looking for a balance of capacity and speed.

Lexar Professional CFexpress Type B Card SILVER Series

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Our Verdict

The great thing about CFexpress cards is their consistency. While there’s a good choice of cards out there, the performance-to-cost ratio is pretty evenly matched across the board. The Lexar Professional CFexpress Type B Card SILVER Series is a mid-range card; however, its performance is more than enough for the vast majority of cameras out there at present.

Lexar states a transfer rate of 1750MB/s with a sustained transfer rate of 1200MB/s. In the Canon EOS R5 C that was used to test the card, these speeds were more than enough, and the camera recorded at its highest internal settings without a glitch.

In the benchmark tests, again, the card performed well, with the results showing close to the maximum transfer rates and actually bettering the values quoted by Lexar.

At 1TB, this is a high-capacity card, and as such, the cost is quite steep; however, it’s by no means the most expensive, with the Gold range adding quite a bit to the initial outlay if you do want to take that step up in speed and capacity. However, at present, that extra cost really doesn’t seem worth it when you have a card that puts in a performance that will keep up with the latest crop of cameras. For the money, this is the card you want if you’re shooting 4K log footage at high-quality settings.

What is the Lexar Professional CFexpress Type B Card SILVER Series?
The Lexar Professional CFexpress Type B Card SILVER Series is a CFexpress Type-B card with a large 1TB capacity, although it is available in smaller capacities as well.

The Silver card is a mid-range offering, although the speed of the offer here for both reading and writing will be sufficient for almost every camera currently on the market.

As the card follows the usual guidelines for CFexpress, aside from the label, there is little else to differentiate this card from another, and it’s only when inserted into the camera that the real quality of the card’s performance can be seen.


  • Well priced
  • Large capacity
  • Great for photo and video


  • Very little

Build and Handling

The Lexar Professional CFexpress Type B Card Silver Series boasts a robust and compact design that adheres to the guidelines for the format but also helps to ensure durability when used out in the field and not protected by the camera or card case.

The card is built to withstand extreme temperatures, operating between -10°C and 70°C, and can be stored in conditions ranging from -25°C to 85°C. Although it is still quite cold for a British June, the temperature is around 17°C, so a freezer will be required to test the lower temperature range while I live in the hope of some sunnier weather to test the upper range.

The card is extremely well made, feels solid in hand, and fits snugly into CFexpress Type B slots, ensuring a secure connection.


  • Capacities:: 128GB, 256GB, 512GB, 1TB
  • Read Speed: Up to 1750MB/s
  • Write Speed: Up to 1300MB/s
  • Sustained Write Speed: 480MB/s (128GB and 256GB), 850MB/s (512GB), 1200MB/s (1TB)
  • Operating Temperature: -10°C to 70°C
  • Storage Temperature: -25°C to 85°C


The Lexar Professional CFexpress Type B Card Silver Series offers high-speed performance with transfer rates of up to 1750MB/s, making it an ideal solution for capturing 8K video and high-resolution images. These data rates will also help ensure fast file transfers between the card and a destination, such as a portable SSD.

The card also offers backward compatibility with select XQD cameras that have had the relevant updates applied, such as the early Nikon Z cameras; however, if you’re hoping to use this Sony FS7, then that camera is still XQD only.

To maximize the speed available, Lexar suggests using the card with its Professional CFexpress Type B Reader.

The card also comes with a limited 10-year warranty so that you can feel safe in the investment!

Lexar Professional CFexpress Type B Card SILVER Series


In real-world tests with the card used in the camera, the card kept up with the demands placed on it when recording 4K footage at the highest internal quality settings possible on the Canon EOS R5 C with absolutely no issues.

Putting the card through a series of benchmarking tests yielded interesting results, with the write speeds actually outperforming the read speeds, which is unusual. However, it’s the write speeds that are the important factor when recording to the card.

Testing the card on a MacBook Pro 16-inch M1 using the Blackmagic Disk Speed test gained the following results:

Write: 1907MB/s
Read: 1518MB/s

These results, sustained over an hour, show that the small card is more than capable of coping with a large amount of data over a long period of time, making it a great solution for video as well as stills.

Lexar Professional CFexpress Type B Card SILVER Series

Final Thoughts

The Lexar Professional CFexpress Type B Card Silver CFexpress Type-B card proved to be a great option for use in the Canon EOS R5 C and many other high-performance cameras suited to enthusiasts as well as professional photographers and videographers.

While the design adheres to the usual CFexpress guidelines, the quality is excellent, highlighting that this card is designed for a long life and professional as well as enthusiast life, and it is likely to be used between multiple cameras and readers.

Lexar Professional CFexpress Type B Card SILVER Series

The backward compatibility with XQD cameras is good, but it’s worth noting that this does require a firmware update for some cameras. The Sony FS7 is XQD only and will not work with this card. It’s also a shame that it doesn’t ship with any integrity software, as seen with the OWC Innergize. Still, it’s a great card and overall good value.

Although the cost is quite high, the performance justifies the investment, especially if you’re shooting 4K log footage at high settings. With a 10-year warranty, this card is a solid, long-term addition to any professional’s kit.