Camera Memory Speed
Memory Card Comparison & Performance Tests for Digital Cameras

Lexar Professional 600x UHS-I 64GB SDXC Memory Card Review

Lexar Professional 600x UHS-I 64GB SDXC Memory Card


The Lexar Professional 600x 64GB SDXC card offers high speed and large capacity to satisfy photography enthusiasts and professionals. It supports UHS-I for fast transfer speed, up to 90MB/s read and 45MB/s write according to Lexar. The 600x card is available in capacities ranging from 16 to 256GB. The 32GB SDHC version was reviewed previously. Here we test the 64GB SDXC version.

Lexar is one of the few memory cards brands actively involved in producing NAND flash memory. Micron, the parent company of Lexar, produces memory chips in Lehi, Utah. Final assembly of the chips into memory cards is completed in Asia; the card reviewed here was assembed in Korea. Lexar Professional memory cards are backed by a limited lifetime warranty.

Lexar Professional 600x UHS-I 64GB SDXC Memory Card Back


To test the raw speed potential of the Lexar 600x SDXC card, it was run through benchmark tests using several USB 3.0 card readers. It reached its rated speed, recording a maximum 95.7 MB/s sequential read. Write speed exceeded specification by a large margin. In the Lexar Professional Dual-Slot Reader it recorded a fastest sequential write speed of 68.6 MB/s. This is well above the 48.6 MB/s measured with the 32GB SDHC version of the card.

Card: Lexar Professional 600x 64GB 64 GB
Benchmark: CrystalDiskMark 3.0.3 x64
Program settings: 1000 MB, 5 passes, random test data
Operating system: Windows 8.1 Pro
Motherboard: Gigabyte GA-Z77X-UD3H
Processor: Intel Core i7-3770K @ 4.40GHz
RAM: 32GB DDR3 1600

Lexar Professional 600x 64GB 64 GB
Card Reader Benchmarks
Lexar LRWM04U-7000 UHS-II Reader96.62567.86087.69723.3126.0201469.80.904220.6
Lexar Professional Workflow SR2 UHS-II96.04167.63386.73124.5885.8951439.30.890217.4
SanDisk Extreme Pro UHS-II SD Reader/Writer95.72567.87887.75423.5926.1001489.40.908221.6
Kingston MobileLite G4 UHS-II95.68267.68187.63923.5676.0341473.20.904220.6
Transcend Multi-Card Reader RDF8 Black95.29068.36586.11816.4435.2511281.90.709173.2
Lexar Professional Workflow SR195.22167.65485.36324.6455.5441353.50.893218.0
Lexar Professional Dual Slot UHS-II Card Reader95.21366.74253.00220.7885.3501306.20.798194.8
Delkin Dual Slot SD UHS-II and CF Card Reader95.10066.81087.81232.9415.8951439.30.903220.5
Transcend SD Card Reader RDF5 Black95.03167.82185.22224.6344.7051148.60.815198.9
Transcend Multi-Card Reader RDF994.94566.38287.42429.4355.8991440.20.898219.2
Delkin Travel Reader94.90266.69984.92629.0135.8551429.50.897218.9
Lexar Professional Dual Slot Reader94.80868.57086.11821.2635.7251397.70.904220.6
Kingston FCR-HS4 Card Reader94.71468.46786.87518.4965.7921414.10.890217.3
Delkin Universal Memory Card Reader93.19067.26084.82832.4895.5691359.50.825201.5
SanDisk ImageMate All-In-One USB 3.092.94267.37278.08423.5143.891949.90.754184.2
Kingston Multi-Card Reader FCR-HS390.33265.08462.14834.2146.0421475.10.907221.5

In testing the Lexar 600x 64GB SDXC in digital cameras it provided consistent performance. It averaged 33.2 MB/s actual write speed in the Canon 6D, only slightly below the 36MB/s maximum speed the camera reached among all SD cards tested. It was faster than the 32GB version which reached 30.7 MB/s in the same test. The results below will be updated as the card is tested in additional cameras.

Lexar Professional 600x 64GB
Tested in Camera
Write Speed
Canon Rebel T6i/T6s58.3
Canon 5Ds54.9
Samsung NX148.5
Fuji X-T1047.5
Nikon D550046.6
Nikon D710045.3
Nikon D720045.0
Olympus E-M5 II38.4
Pentax K-3 II35.2
Sony A7R II34.7
Sony A600033.5
Canon 70D33.5
Canon 6D33.2

Cameras tested with this card: Canon 5Ds, Canon 6D, Canon 70D, Canon Rebel T6i/T6s, Fuji X-T10, Nikon D7100, Nikon D5500, Nikon D7200, Olympus E-M5 II, Pentax K-3 II, Samsung NX1, Sony A7R II, Sony A6000


To compare among other popular 64GB cards, consider the SanDisk Extreme 60MB/s and Extreme Plus 80MB/s 64GB SDXC cards. In benchmark tests, the Lexar Professional 600x 64GB exceeds both the read and write speed of the SanDisk Extreme 60MB/s card, and is more in line with the SanDisk Extreme Plus 80MB/s. In testing in the Canon 6D, the Lexar trailed both SanDisk cards by a small margin. Currently the Lexar 600x is priced similarly to the Extreme 60MB/s, making the Lexar 600x a good value with a faster read speed compared with the Extreme 60MB/s card.

The following table contains information encoded in the SD card.

Lexar Professional 600x 64GB SD — Internal Card Information
Serial number (PSN)3040483724
Product Name (PNM)
Product Revision0.1
Manufacturer ID (MID)0x000028
Manufacture Date (MDT)10/2014
Total capacity64,087,916,544 bytes


The Lexar Professional 600X 64GB SDXC offers a compelling combination of speed, capacity and value. As a prominent brand actively involved in flash memory production, Lexar has earned the trust of many photographers. The 64GB Lexar 600x SDXC card provides consistent performance in benchmark and in-camera testing.

Available sizes and prices

Compare prices on the Lexar Professional 600x card. The lowest prices are highlighted in the table below. Prices are updated daily.

$ / GB
AmazonB&H PhotoAdorama
Lexar Professional 600x SD16$0.81$12.95Check priceCheck price
Lexar Professional 600x SD32$0.47$37.39$14.95Check price
Lexar Professional 600x SD64$0.86$55.14Check priceCheck price
Lexar Professional 600x SD128$0.51$65.48Check priceCheck price
Lexar Professional 600x SD256$0.39$100.00Check priceCheck price

Note: New Lexar Professional 633x SD cards have been introduced and will replace the current 600x SD cards.

The new Lexar Professional 633x have been reviewed:
Lexar Professional 633x 32GB SDHC card review
Lexar Professional 633x 64GB SDXC card review