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Lexar Professional 1000x UHS-II 64GB SDXC Memory Card Review

Lexar Professional 1000x UHS-II 64GB U3 SDXC Memory Card Front


Lexar Professional 1000x SD cards feature UHS-II performance at a value price. The 1000x UHS-II card line was introduced in early 2015. The cards utilize a new bus interface to provide improved transfer speed while being backwards compatible with UHS-I and Standard SD devices, although at lower speed. Lexar advertises the 1000x cards with read speeds of 150MB/s and a write speeds of 75MB/s. The 150MB/s speed can only be attained using the UHS-II interface, otherwise the card is limited to about 95MB/s in UHS-I mode. Lexar 1000x UHS-II cards are available in 16, 32, 64, 128 and 256 GB capacities. The 64GB card (LSD64GCRBNA1000) is tested in this review.

Lexar Professional 1000x UHS-II 64GB SDXC U3 Memory Card Back

What separates UHS-II cards from standard SD and UHS-I cards is new UHS-II interface. The back of the card has a second row of pads that connect to matching pins on UHS-II enabled devices. The card still has the traditional SD connections and will work at lower speed in UHS-I and earlier devices. In UHS-I mode this card will operate in SDR104 mode (104MB/s maximum bus speed).


While the Lexar 1000x UHS-II card offers a boost in read speed over UHS-I cards, its write speed is still within UHS-I territory. During benchmark testing in UHS-II USB 3.0 card readers, it reached 153.2 MB/s sequential read speed. Write speed measured 84.3 MB/s in the fastest test. In UHS-I mode the card reached 93.2 MB/s sequential read and 76.1 MB/s sequential write. In UHS-I mode it still trails the fastest UHS-I cards.

Card: Lexar Professional 1000x UHS-II 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 1000x UHS-II 64GB 64 GB
Card Reader Benchmarks
SanDisk Extreme Pro UHS-II SD Reader/Writer153.16683.472138.0630.89011.6722849.51.124274.4
Lexar LRWM04U-7000 UHS-II Reader153.14482.396135.7491.10811.2452745.31.139278.1
Lexar Professional Dual Slot UHS-II Card Reader153.05483.832139.9941.01611.6102834.41.120273.5
Delkin Dual Slot SD UHS-II and CF Card Reader152.72083.886139.4851.00211.8882902.31.132276.4
Kingston FCR-HS4 Card Reader152.67684.041138.0840.99911.4312790.71.131276.2
Kingston MobileLite G4 UHS-II152.67683.772138.7921.27511.5782826.71.119273.2
Transcend Multi-Card Reader RDF9152.63183.913140.7831.00111.8112883.61.144279.3
Lexar Professional Workflow SR2 UHS-II151.66084.304137.6721.07911.5222813.11.143279.1
Sony MRW-E90 XQD 2.0 / SD UHS-II Card Reader136.40982.898137.0120.84610.1542479.01.080263.8
Delkin Travel Reader93.23275.65586.9900.95810.5952586.71.058258.3
Lexar Professional Workflow SR192.81975.98987.9421.1519.0212202.31.065260.0
Transcend Multi-Card Reader RDF8 Black92.80375.83589.1590.8519.2552259.51.004245.2
Delkin Universal Memory Card Reader92.77875.74888.8771.1309.2722263.61.000244.1
Transcend SD Card Reader RDF5 Black92.69675.68287.7250.6887.0591723.30.964235.4
Lexar Professional Dual Slot Reader92.68876.13889.0700.7509.5112321.91.061259.0
SanDisk ImageMate All-In-One USB 3.090.54375.43778.3300.8395.3651309.80.913223.0
Kingston Multi-Card Reader FCR-HS387.40372.23161.9640.61310.3892536.31.063259.5

The Lexar 1000x 64GB SDXC card was tested in several digital cameras. In some UHS-II capable cameras, such as the Olympus E-M5 Mark II and PEN-F, it outperforms UHS-I cards because the camera uses UHS-II and does not support the fast SDR104 UHS-I mode. In other cameras such as the Nikon D500 it lags several UHS-I cards; the D500 supports UHS-II as well as SDR104 in UHS-I mode, so UHS-I cards with higher write speed than this Lexar 1000x card have the advantage.

Lexar Professional 1000x UHS-II 64GB
Tested in Camera
Write Speed
Olympus E-M1 II75.6
Olympus PEN-F73.7
Nikon D50071.9
Fuji X-Pro268.1
Canon 80D66.9
Canon 5D Mark IV65.8
Fuji X-T1052.4
Sony A7R II34.9
Sony A630032.9

Cameras tested with this card: Canon 5D Mark IV, Canon 80D, Fuji X-Pro2, Fuji X-T10, Nikon D500, Olympus E-M1 II, Olympus PEN-F, Sony A7R II, Sony A6300

Lexar Professional series memory cards have a limited lifetime warranty. The card tested in this review was made in Korea.

The following table contains information encoded in the SD card.

Lexar Professional 1000x UHS-II 64GB SD — Internal Card Information
Serial number (PSN)819159177
Product Name (PNM)
Product Revision1.0
Manufacturer ID (MID)0x000028
Manufacture Date (MDT)07/2015
Total capacity63,014,174,720 bytes


The Lexar 1000x UHS-II card offers a combination of speed and value. It offers superior 150MB/s download speed over UHS-I cards but is not quite as fast as UHS-I cards in write speed. Some cameras including the Olympus E-M5 II and PEN-F benefit from its UHS-II interface, while other cameras may be faster with other UHS-I cards. Given the competitive price, the 1000x card may be worth consideration for your camera.

Available sizes and prices

Compare prices on the Lexar Professional 1000x card. The lowest prices are highlighted in the table below. Prices are updated daily.

$ / GB
AmazonB&H PhotoAdorama
Lexar Professional 1000x SD UHS-II16$0.98$15.69$15.69$15.75
Lexar Professional 1000x SD UHS-II32$0.62$19.95$22.46$21.95
Lexar Professional 1000x microSD32$0.59$18.95$24.95$18.95
Lexar Professional 1000x SD UHS-II64$0.55$34.95$36.95$39.95
Lexar Professional 1000x microSD64$0.55$34.95$44.95$34.95
Lexar Professional 1000x SD UHS-II128$0.47$59.99$67.95$74.95
Lexar Professional 1000x microSD128$0.62$79.95$89.95$79.95
Lexar Professional 1000x SD UHS-II256$0.51$129.95$129.95$129.95