Best SD Cards In-Camera Comparison | Canon G7X III

We tested all the most popular SD memory cards, both UHS-II and UHS-I in the Canon G7X mark III to find the best performing and most practical cards.

This is the ultimate guide to finding the best memory cards for the Canon G7X III.

Best SD Memory Cards Canon G7X III

The Canon G7xIII only has hardware support for UHS-I memory cards. There is no speed advantage to using UHS-II cards.

Top 7 Best Memory Cards

This quick list shows the top-performing memory cards from the in-camera speed test.

You shouldn’t spend more than $20 on a 64GB card, so check prices.

Video Shooters

The Canon G7X III can shoot 4k video at 120Mbps. This translates to about 15MB/s. I ran even the slowest cards in the PowerShot G7X Mark III to test 4k video and I did not have any problems. You can use any of the cards on the list for video just fine.

To be compatible with the video bitrates supported by this camera you will need a memory card that is at least a U3 rating.

In-Camera Speed Test

This chart shows how fast each memory card performed in the G7XIII.

To perform the test a continuous burst is shot until the buffer fills. The amount of data created is then calculated against how long it takes for the buffer to clear. This test is run a few times to troubleshoot any problems.

For USB speeds I used Windows 10 with crystal disk.

Speed Chart

You can click the top categories to sort by speed.

There are a lot of different cards tested with various speed classes and specs. To learn more about what all these numbers mean check out the ultimate guide to memory cards.

Canon G7XIII Specs Specs And Buffer Questions

Canon PowerShot G7X Mark III – Amazon / Adorama / Bhphoto

Recommended Memory Cards | Canon G7X III

Here is a detailed list about each card and why they are recommended.

Top Performers

Canon G7X III File Size Video Record Times

The Canon G7X III has a 4k video bitrate of about 120Mbps which translates to about 15MB/s.

This means when you’re shooting video you’ll be shooting 15MB ever second.

Canon G7X III video bitrate performance.

4k 24p / 30p – 120Mbps
1080p 29.97p/59.94p/119.88p [30 to 120 Mbps]

Here is a chart that will show how much footage each card will be able to hold.

How To Avoid Counterfeit Cards

Counterfeit cards have become a real problem when buying memory cards online. To help you find if you have a counterfeit card or not, I’m now including a quick guide in my memory card articles.

How Counterfeit Memory Cards Work

Often counterfeit memory cards work by hacking the memory controller. So you’ll buy a 128GB card, your computer and your camera tell you it’s a 128GB card, but it actually only has 32GB of flash memory. 

The controllers are usually hacked to tell you the card is bigger than it really is.

This is a problem because you’ll for days or even weeks before breaking the threshold and when you do, boom, dead card. 

This is why when you read some reviews online you’ll see someone say, “the card was great for a few weeks then it died.”

Where To Buy Memory Cards

If possible, always try to buy your SD cards from a trusted source. Adorama, BHphoto local stores. Avoid auctions sites and be careful with websites that use mixed inventory. Meaning they throw all the cards into a bin that comes from different sources.

The best and easiest thing you can do is check the size of the memory card right when you get it. Fill it to its max capacity.

If you buy from Amazon try to make sure the seller is a trusted source. There are rumors Amazon combines inventory, but it could depend on your region.

Best Memory Cards Canon G7X III | Conclusions

The Canon G7X III does not have the hardware to support UHS-II memory cards, so all you need to buy is UHS-I cards just make sure it’s at least a U3 rating so you don’t run into any video buffer issues.

Try not to spend more than $20 on a 64GB card and most of the high-end SD UHS-I cards perform very well.