Lexar Professional recently released the 1066x microSD Card. So, how does the new series compare to the 300x, 663x, 667x, 667x Video, 1000x and 1800x?
You can find out in this versus guide between these seven cards.
Quick Summary
The Lexar Professional 1800x microSDXC Card has the best general reading and writing speeds of the group. It also has the best video speed class. If you are planning to use your card for shooting video, especially 8K, then the 1800x is the best choice.
The Lexar microSDXC cards with a V30 or V60 classifications are also great for shooting videos of up to 4K in resolution.
If you are planning to use your card to run Android applications, then you should get the Lexar cards that have the A2 classification. These include the 512GB 663x, 128GB 667x, 256GB 667x, 512GB 667x, 64GB 1066x, 128GB 1066x and 256GB 1066x cards.
300x vs. 663x vs. 667x vs. 667x Video vs. 1000x vs. 1066x vs. 1800x Comparison Chart
You can find Seeking Tech’s comparison table between these micro SD cards below.
| Lexar Professional 300x | Lexar Professional 663x | Lexar Professional 667x | Lexar Professional 667x Video | Lexar Professional 1000x | Lexar Professional 1066x | Lexar Professional 1800x | |
|---|---|---|---|---|---|---|---|
| Capacity Options | 8 GB 16 GB 32 GB 64 GB | 32 GB 64 GB 128 GB 256 GB 512 GB | 64 GB 128 GB 256 GB | 64 GB 128 GB 256 GB | 32 GB 64 GB 128 GB 256 GB | 32 GB 64 GB 128 GB 256 GB | 64 GB 128 GB |
| Hardware Interface | 8GB 300x: MicroSDHC 16GB 300x: MicroSDHC 32GB 300x: MicroSDHC 64GB 300x: MicroSDXC | 32GB 663x: MicroSDHC 64GB 663x: MicroSDXC 128GB 663x: MicroSDXC 256GB 663x: MicroSDXC 512GB 663x: MicroSDXC | 64GB 667x: MicroSDXC 128GB 667x: MicroSDXC 256GB 667x: MicroSDXC | 64GB 667x Video: MicroSDXC 128GB 667x Video: MicroSDXC 256GB 667x Video: MicroSDXC | 32GB 1000x: MicroSDHC 64GB 1000x: MicroSDXC 128GB 1000x: MicroSDXC 256GB 1000x: MicroSDXC | 32GB 1066x: MicroSDHC 64GB 1066x: MicroSDXC 128GB 1066x: MicroSDXC 256GB 1066x: MicroSDXC | 64GB 1800x: MicroSDXC 128GB 1800x: MicroSDXC |
| Speed Classifications | 8GB 300x: Class 10, U1 16GB 300x: Class 10, U1 32GB 300x: Class 10, U1 64GB 300x: Class 10, U1 | 32GB 663x: Class 10, U1, V10, A1 64GB 663x: Class 10, U3, V30, A1 128GB 663x: Class 10, U3, V30, A1 256GB 663x: Class 10, U3, V30, A1 512GB 663x: Class 10, U3, V30, A2 | 64GB 667x: Class 10, U3, V30, A1 128GB 667x: Class 10, U3, V30, A2 256GB 667x: Class 10, U3, V30, A2 | 64GB 667x Video: Class 10, U3, V30 128GB 667x Video: Class 10, U3, V30 256GB 667x Video: Class 10, U3, V30 | 32GB 1000x: Class 10, U3, V60 64GB 1000x: Class 10, U3, V60 128GB 1000x: Class 10, U3, V60 256GB 1000x: Class 10, U3, V60 | 32GB 1066x: Class 10, U1, V10, A1 64GB 1066x: Class 10, U3, V30, A2 128GB 1066x: Class 10, U3, V30, A2 256GB 1066x: Class 10, U3, V30, A2 | 64GB 1800x: Class 10, U3, V90 128GB 1800x: Class 10, U3, V90 |
| Read Speed | 8 GB 300x: Up to 45 MB per second 16 GB 300x: Up to 45 MB per second 32 GB 300x: Up to 45 MB per second 64 GB 300x: Up to 45 MB per second | 32 GB 663x: Up to 100 MB per second 64 GB 663x: Up to 100 MB per second 128 GB 663x: Up to 100 MB per second 256 GB 663x: Up to 100 MB per second 512 GB 663x: Up to 100 MB per second | 64 GB 667x: Up to 100 MB per second 128 GB 667x: Up to 100 MB per second 256 GB 667x: Up to 100 MB per second | 64 GB 667x Video: Up to 100 MB per second 128 GB 667x Video: Up to 100 MB per second 256 GB 667x Video: Up to 100 MB per second | 32 GB 1000x: Up to 150 MB per second 64 GB 1000x: Up to 150 MB per second 128 GB 1000x: Up to 150 MB per second 256 GB 1000x: Up to 150 MB per second | 32 GB 1066x: Up to 160 MB per second 64 GB 1066x: Up to 160 MB per second 128 GB 1066x: Up to 160 MB per second 256 GB 1066x: Up to 160 MB per second | 64 GB 1800x: Up to 270 MB per second 128 GB 1800x: Up to 270 MB per second |
| Write Speed | 8GB 300x: Up to 10 MB per second 16GB 300x: Up to 10 MB per second 32GB 300x: Up to 10 MB per second 64GB 300x: Up to 10 MB per second | 32GB 663x: N/A 64GB 663x: Up to 45 MB per second 128GB 663x: Up to 45 MB per second 256GB 663x: Up to 45 MB per second 512GB 663x: Up to 70 MB per second | 64GB 667x: Up to 60 MB per second 128GB 667x: Up to 90 MB per second 256GB 667x: Up to 90 MB per second | 64GB 667x Video: Up to 60 MB per second 128GB 667x Video: Up to 90 MB per second 256GB 667x Video: Up to 90 MB per second | 32GB 1000x: Up to 75 MB per second 64GB 1000x: Up to 90 MB per second 128GB 1000x: Up to 90 MB per second 256GB 1000x: Up to 90 MB per second | 32GB 1066x: N/A 64GB 1066x: Up to 70 MB per second 128GB 1066x: Up to 120 MB per second 256GB 1066x: Up to 120 MB per second | 64GB 1800x: Up to 150 MB per second 128GB 1800x: Up to 150 MB per second |
| Dimensions | 11 mm x 15 mm x 1 mm or 0.43” x 0.59” x 0.04” | 11 mm x 15 mm x 1 mm or 0.43” x 0.59” x 0.04” | 11 mm x 15 mm x 1 mm or 0.43” x 0.59” x 0.04” | 11 mm x 15 mm x 1 mm or 0.43” x 0.59” x 0.04” | 11 mm x 15 mm x 1 mm or 0.43” x 0.59” x 0.04” | 11 mm x 15 mm x 1 mm or 0.43” x 0.59” x 0.04” | 11 mm x 15 mm x 1 mm or 0.43” x 0.59” x 0.04” |
| Operating Temperature | 0°C to 70°C or 32°F to 158°F | 0°C to 70°C or 32°F to 158°F | 0°C to 70°C or 32°F to 158°F | 0°C to 70°C or 32°F to 158°F | 0°C to 70°C or 32°F to 158°F | 0°C to 70°C or 32°F to 158°F | 0°C to 70°C or 32°F to 158°F |
| Storage Temperature | -25°C to 85°C or -13°F to 185°F | -25°C to 85°C or -13°F to 185°F | -25°C to 85°C or -13°F to 185°F | -25°C to 85°C or -13°F to 185°F | -25°C to 85°C or -13°F to 185°F | -25°C to 85°C or -13°F to 185°F | -25°C to 85°C or -13°F to 185°F |
| Pricing | Check price on Amazon.(#CommissionsEarned) | Check price on Amazon.(#CommissionsEarned) | Check price on Amazon.(#CommissionsEarned) | Check price on Amazon.(#CommissionsEarned) | Check price on Amazon.(#CommissionsEarned) | Check price on Amazon.(#CommissionsEarned) | Check price on Amazon.(#CommissionsEarned) |
Capacity Options
The 300x is the only micro SD card type that offers 8 GB and 16 GB options. On the other end of the spectrum, the 663x is the card to have a 512 GB option.
You can check out the available capacities for each product below:
Lexar Professional 300x:
- 8 GB
- 16 GB
- 32 GB
- 64 GB
Lexar Professional 663x:
- 32 GB
- 64 GB
- 128 GB
- 256 GB
- 512 GB
Lexar Professional 667x:
- 64 GB
- 128 GB
- 256 GB
Lexar Professional 667x Video:
- 64 GB
- 128 GB
- 256 GB
Lexar Professional 1000x:
- 32 GB
- 64 GB
- 128 GB
- 256 GB
Lexar Professional 1066x:
- 32 GB
- 64 GB
- 128 GB
- 256 GB
Lexar Professional 1800x:
- 64 GB
- 128 GB
Hardware Interface
The smaller capacity cards from Lexar (32GB or less) use the MicroSDHC while the bigger capacities (64GB or more) use MicroSDXC. MicroSDHC cards will work with devices that support MicroSDHC or MicroSDXC while the MicroSDXC cards will only work with devices that support MicroSDXC.
You can check out the formats for each capacity options below:
- 8GB 300x: MicroSDHC
- 16GB 300x: MicroSDHC
- 32GB 300x: MicroSDHC
- 64GB 300x: MicroSDXC
- 32GB 663x: MicroSDHC
- 64GB 663x: MicroSDXC
- 128GB 663x: MicroSDXC
- 256GB 663x: MicroSDXC
- 512GB 663x: MicroSDXC
- 64GB 667x: MicroSDXC
- 128GB 667x: MicroSDXC
- 256GB 667x: MicroSDXC
- 64GB 667x Video: MicroSDXC
- 128GB 667x Video: MicroSDXC
- 256GB 667x Video: MicroSDXC
- 32GB 1000x: MicroSDHC
- 64GB 1000x: MicroSDXC
- 128GB 1000x: MicroSDXC
- 256GB 1000x: MicroSDXC
- 32GB 1066x: MicroSDHC
- 64GB 1066x: MicroSDXC
- 128GB 1066x: MicroSDXC
- 256GB 1066x: MicroSDXC
- 64GB 1800x: MicroSDXC
- 128GB 1800x: MicroSDXC
Ultra High Speed Bus Interface
The 300x, 663x, 667x, 667x Video and 1066x use UHS-I, which provides bus speeds of up to up to 104 MB per second. The 1000x and 1800x use UHS-II, which provides bus speeds to up to 312 MB per second.
You can find the full breakdown of the bus interface used for each capacity below:
- 8 GB 300x: UHS-I
- 16 GB 300x: UHS-I
- 32 GB 300x: UHS-I
- 64 GB 300x: UHS-I
- 32 GB 663x: UHS-I
- 64 GB 663x: UHS-I
- 128 GB 663x: UHS-I
- 256 GB 663x: UHS-I
- 512 GB 663x: UHS-I
- 64 GB 667x: UHS-I
- 128 GB 667x: UHS-I
- 256 GB 667x: UHS-I
- 64 GB 667x Video: UHS-I
- 128 GB 667x Video: UHS-I
- 256 GB 667x Video: UHS-I
- 32 GB 1000x: UHS-II
- 64 GB 1000x: UHS-II
- 128 GB 1000x: UHS-II
- 256 GB 1000x: UHS-II
- 32 GB 1066x: UHS-I
- 64 GB 1066x: UHS-I
- 128 GB 1066x: UHS-I
- 256 GB 1066x: UHS-I
- 64 GB 1800x: UHS-II
- 128 GB 1800x: UHS-II
Speed Classifications
There are several speed classifications, which can be quite confusing.
Class
The first is class, which represents the minimum write speed of a micro SD card. All the Lexar cards in this comparison guide are Class 10, meaning that the products have a minimum write speed of at least 10 MB per second.
UHS Speed Class
Next up is the UHS Speed Class, which also shows the minimum write speed of a card.
The 300x series, as well as the 32GB versions of the 663x and 1066x, are classified as U1, meaning that the cards have a write speed of at least 10 MB per second.
The rest of the cards are classified as U3 since these products have a write speed of at least 30 MB per second.
Video Speed Class
Video Speed Class measures the sustained writing ability of a memory card, which is important for continuous video recording.
The 300x series don’t have any classification, so it is not suitable for video recording.
The 32GB versions of the 663x and 1066x are V10 as these microSD cards are capable of 10 MB per second.
The bigger capacities of the 663x and 1066x, as well as the 667x and 667x Videos series, are V30 as these memory cards are capable of writing at least 30 MB per second.
The Lexar 1000x series are classified as V60 with the capability of writing 60 MB per second.
Last but certainly not least is the 1800x with V90, which means that the cards are write at least 90 MB per second.
For video shooting, V90 is the only option if you are shooting 8K videos. V30 and above are recommend for 4K video shooting while V30 and below are suitable for 1080p, 720p and standard resolution video shooting.
Application Performance Class
Some of the cards also have an Application Performance Class, which measures the sustained write speed in addition to random read and write speeds. This specification is used to see how fast and Android apps can be launched in addition to how fast they can perform on micro SD cards.
The 32GB to 256GB versions of the 663x along with the 64 GB version of the 667x and 32 GB version of the 1066x are classified as A1, which means that these cards have a sustained write speed of at least 10 MB in addition to a random read speed of at least 1500 IOPS and a random write speed of at least 500 IOPS.
The 512GB version of the 663x, 128GB to 256GB versions of the 667x as well as the 64GB to 256GB versions of the 1066x are classified as A2. This mean that these memory cards can sustain a writing speed of 10 MB minimum in addition to a random read speed of 4000 IOPS minimum and a random write speed of 2000 IOPS minimum.
So, if you want best speeds for Android apps, make sure you get the A2 Lexar microSDXC cards.
You can take a look at the speed classifications for each capacity below:
- 8GB 300x: Class 10, U1
- 16GB 300x: Class 10, U1
- 32GB 300x: Class 10, U1
- 64GB 300x: Class 10, U1
- 32GB 663x: Class 10, U1, V10, A1
- 64GB 663x: Class 10, U3, V30, A1
- 128GB 663x: Class 10, U3, V30, A1
- 256GB 663x: Class 10, U3, V30, A1
- 512GB 663x: Class 10, U3, V30, A2
- 64GB 667x: Class 10, U3, V30, A1
- 128GB 667x: Class 10, U3, V30, A2
- 256GB 667x: Class 10, U3, V30, A2
- 64GB 667x Video: Class 10, U3, V30
- 128GB 667x Video: Class 10, U3, V30
- 256GB 667x Video: Class 10, U3, V30
- 32GB 1000x: Class 10, U3, V60
- 64GB 1000x: Class 10, U3, V60
- 128GB 1000x: Class 10, U3, V60
- 256GB 1000x: Class 10, U3, V60
- 32GB 1066x: Class 10, U1, V10, A1
- 64GB 1066x: Class 10, U3, V30, A2
- 128GB 1066x: Class 10, U3, V30, A2
- 256GB 1066x: Class 10, U3, V30, A2
- 64GB 1800x: Class 10, U3, V90
- 128GB 1800x: Class 10, U3, V90
Read Speed
When it comes to general read speed, the 1800x easily comes out on top, followed by the new 1066x and then the 1000x. The 300x is the slowest of the group.
You can check out the maximum read speed for each of the capacities below:
- 8 GB 300x: Up to 45 MB per second
- 16 GB 300x: Up to 45 MB per second
- 32 GB 300x: Up to 45 MB per second
- 64 GB 300x: Up to 45 MB per second
- 32 GB 663x: Up to 100 MB per second
- 64 GB 663x: Up to 100 MB per second
- 128 GB 663x: Up to 100 MB per second
- 256 GB 663x: Up to 100 MB per second
- 512 GB 663x: Up to 100 MB per second
- 64 GB 667x: Up to 100 MB per second
- 128 GB 667x: Up to 100 MB per second
- 256 GB 667x: Up to 100 MB per second
- 64 GB 667x Video: Up to 100 MB per second
- 128 GB 667x Video: Up to 100 MB per second
- 256 GB 667x Video: Up to 100 MB per second
- 32 GB 1000x: Up to 150 MB per second
- 64 GB 1000x: Up to 150 MB per second
- 128 GB 1000x: Up to 150 MB per second
- 256 GB 1000x: Up to 150 MB per second
- 32 GB 1066x: Up to 160 MB per second
- 64 GB 1066x: Up to 160 MB per second
- 128 GB 1066x: Up to 160 MB per second
- 256 GB 1066x: Up to 160 MB per second
- 64 GB 1800x: Up to 270 MB per second
- 128 GB 1800x: Up to 270 MB per second
Write Speed
The 1800x is also the fastest when it comes to maximum write speed while the 300x is easily the slowest.
The writing speed for the other cards depends on the capacity.
You can the max write speed specs below:
- 8GB 300x: Up to 10 MB per second
- 16GB 300x: Up to 10 MB per second
- 32GB 300x: Up to 10 MB per second
- 64GB 300x: Up to 10 MB per second
- 32GB 663x: N/A
- 64GB 663x: Up to 45 MB per second
- 128GB 663x: Up to 45 MB per second
- 256GB 663x: Up to 45 MB per second
- 512GB 663x: Up to 70 MB per second
- 64GB 667x: Up to 60 MB per second
- 128GB 667x: Up to 90 MB per second
- 256GB 667x: Up to 90 MB per second
- 64GB 667x Video: Up to 60 MB per second
- 128GB 667x Video: Up to 90 MB per second
- 256GB 667x Video: Up to 90 MB per second
- 32GB 1000x: Up to 75 MB per second
- 64GB 1000x: Up to 90 MB per second
- 128GB 1000x: Up to 90 MB per second
- 256GB 1000x: Up to 90 MB per second
- 32GB 1066x: N/A
- 64GB 1066x: Up to 70 MB per second
- 128GB 1066x: Up to 120 MB per second
- 256GB 1066x: Up to 120 MB per second
- 64GB 1800x: Up to 150 MB per second
- 128GB 1800x: Up to 150 MB per second
Dimensions
All of the microSD cards in this comparison guide have measurements of 11 mm x 15 mm x 1 mm or 0.43” x 0.59” x 0.04”.
Operating Temperature
The recommended operating temperature ranges are the same at 0°C to 70°C or 32°F to 158°F.
Storage Temperature
The recommended storage temperatures are also identical at -25°C to 85°C or -13°F to 185°F.
Resources:
- https://www.lexar.com/portfolio_page/high-performance-633x-microsdhcmicrosdxc-uhs-i-cards
- https://www.lexar.com/portfolio_page/professional-667x-microsdxc-uhs-i-card
- https://www.lexar.com/portfolio_page/professional-667x-video-microsdxc-uhs-card
- https://www.lexar.com/portfolio_page/professional-1000x-microsdhcmicrosdxc-uhs-ii-cards/
- https://www.lexar.com/portfolio_page/professional-1800x-microsdxc-uhs-ii-cards/
- https://www.amazon.com/Lexar-High-Performance-microSDHC-UHS-I-Memory/dp/B012PMB6B2?th=1