Lexar quietly downgraded the Professional 633x cards from U3 to U1 speed rating. The new 633x U1 cards are rated at the same 95MB/s read speed, but the write speed is quoted at 20MB/s, rather the the 45MB/s speed advertised with the old cards. The UHS Speed Class 1 (U1) specification means the card will sustain at least 10MB/s write speed in continuous recording applications, such as video. The maximum quoted speed at 20MB/s is a maximum rating given by Lexar under ideal conditions.
The new 633x U1 cards are offered in 16, 32, 64 and 128 GB capacities. The 256 and 512GB cards retain the U3 speed rating. This review covers the 633x U1 64GB SDXC card (LSD64GCB1NL633).
The 64GB 633x U1 card was tested in various USB 3.0 card readers. The highest sequential read speed reached 96.9 MB/s, which is essentially the same as 96.0 MBs measured with the old U3 card. However when it comes to write speed the new U1 card fell short. Sequential write speed reached 29.5MB/s at best, comapred with the 69.3MB/s of the old card it replaces. The downgrade in speed is accompanied by a lower price. Those looking for performance similar to the old 633x U3 card will have to look at the Lexar Professional 1000x U3 UHS-II card.
Card: Lexar Professional 633x U1 64GB
Benchmark: CrystalDiskMark 3.0.3 x64
Program settings: 1000 MB, 5 passes, random test data
Operating system: Windows 10 Pro
Motherboard: Gigabyte GA-Z77X-UD3H
Processor: Intel Core i7-3770K @ 4.40GHz
RAM: 32GB DDR3 1600
Lexar Professional 633x U1 64GB Card Reader Benchmarks | Seq. Read 1000MB MB/s | Seq. Write 1000MB MB/s | Rand. Read 512KB MB/s | Rand. Write 512KB MB/s | Rand. Read 4KB MB/s QD1 | Rand. Read 4KB IOPS QD1 | Rand. Write 4KB MB/s QD1 | Rand. Write 4KB IOPS QD1 | Rand. Read 4KB MB/s QD32 | Rand. Read 4KB IOPS QD32 | Rand. Write 4KB MB/s QD32 | Rand. Write 4KB IOPS QD32 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Sony S1 High Speed UHS-II Reader/Writer | 97.961 | 28.641 | 84.535 | 11.649 | 4.747 | 1158.8 | 0.868 | 212.0 | 5.544 | 1353.6 | 1.048 | 255.8 |
SanDisk Extreme Pro SD UHS-II Reader/Writer | 97.906 | 28.940 | 84.535 | 10.040 | 4.765 | 1163.3 | 0.709 | 173.2 | 5.658 | 1381.4 | 0.814 | 198.8 |
Delkin Black Rugged Card Reader | 97.842 | 28.637 | 84.120 | 13.693 | 4.694 | 1146.1 | 0.829 | 202.4 | 5.371 | 1311.3 | 1.044 | 254.8 |
Lexar LRWM04U-7000 UHS-II Reader | 96.884 | 28.645 | 88.334 | 9.090 | 6.553 | 1599.7 | 0.951 | 232.2 | 7.642 | 1865.6 | 1.211 | 295.6 |
Hama USB 3.0 UHS-II SD Card Reader | 96.875 | 28.601 | 87.582 | 9.765 | 6.139 | 1498.8 | 0.816 | 199.2 | 7.492 | 1829.0 | 0.888 | 216.9 |
Lexar Professional Workflow SR2 UHS-II | 96.866 | 29.105 | 87.884 | 9.145 | 6.524 | 1592.8 | 0.994 | 242.8 | 7.687 | 1876.7 | 1.238 | 302.2 |
Hama USB Type-C 3.1 UHS-II SD Card Reader | 96.643 | 28.540 | 86.274 | 11.916 | 6.632 | 1619.1 | 0.991 | 242.0 | 7.853 | 1917.2 | 1.231 | 300.5 |
Transcend Multi-Card Reader RDF9 | 95.490 | 28.625 | 87.567 | 11.027 | 6.488 | 1583.9 | 0.986 | 240.7 | 7.568 | 1847.7 | 1.209 | 295.2 |
DriverGenius USB 3.1(G1) / 3.0 UHS-II SD Card Reader | 95.368 | 27.349 | 86.260 | 14.530 | 5.725 | 1397.7 | 0.613 | 149.6 | 7.222 | 1763.1 | 1.204 | 293.8 |
SanDisk ImageMate Pro Multi-Card Reader/Writer | 95.031 | 27.405 | 82.891 | 11.345 | 4.503 | 1099.5 | 0.840 | 205.0 | 5.445 | 1329.3 | 1.027 | 250.8 |
Delkin Multi-Card CFast SD UHS-II microSD Reader | 95.031 | 27.529 | 87.105 | 10.938 | 6.695 | 1634.5 | 0.997 | 243.4 | 7.822 | 1909.7 | 1.198 | 292.5 |
SanDisk Extreme Pro UHS-II SD Reader/Writer | 94.920 | 28.891 | 87.898 | 10.113 | 6.596 | 1610.3 | 0.946 | 231.0 | 7.687 | 1876.8 | 1.252 | 305.7 |
Transcend Multi-Card Reader RDF8 Black | 94.834 | 28.579 | 86.961 | 8.963 | 6.252 | 1526.3 | 0.617 | 150.7 | 7.081 | 1728.7 | 1.078 | 263.1 |
Delkin Dual Slot SD UHS-II and CF Card Reader | 94.791 | 29.486 | 87.682 | 7.895 | 6.632 | 1619.1 | 0.936 | 228.5 | 7.671 | 1872.9 | 1.252 | 305.8 |
Lexar Professional Dual Slot UHS-II Card Reader | 94.722 | 28.720 | 53.088 | 10.622 | 6.103 | 1490.1 | 0.620 | 151.3 | 6.908 | 1686.5 | 0.616 | 150.5 |
Kingston FCR-HS4 Card Reader | 94.671 | 28.686 | 87.496 | 11.341 | 6.550 | 1599.2 | 0.937 | 228.8 | 7.643 | 1866.0 | 1.171 | 285.8 |
Kingston MobileLite G4 UHS-II | 94.620 | 28.216 | 87.294 | 10.130 | 6.579 | 1606.3 | 0.988 | 241.1 | 7.655 | 1869.0 | 1.234 | 301.2 |
Delkin Travel Reader | 94.577 | 28.765 | 85.705 | 10.207 | 6.526 | 1593.4 | 0.993 | 242.5 | 7.700 | 1879.9 | 1.222 | 298.4 |
Delkin Universal Memory Card Reader | 94.229 | 28.769 | 86.331 | 9.308 | 5.976 | 1458.9 | 0.607 | 148.1 | 7.048 | 1720.7 | 1.084 | 264.7 |
Transcend SD Card Reader RDF5 Black | 94.034 | 28.651 | 86.104 | 11.234 | 5.089 | 1242.4 | 0.898 | 219.2 | 5.537 | 1351.8 | 1.105 | 269.8 |
Sony MRW-E90 XQD 2.0 / SD UHS-II Card Reader | 92.614 | 28.811 | 84.216 | 9.374 | 6.117 | 1493.3 | 0.927 | 226.3 | 7.232 | 1765.7 | 1.190 | 290.6 |
SanDisk ImageMate All-In-One USB 3.0 | 92.166 | 28.339 | 77.736 | 8.526 | 4.159 | 1015.5 | 0.837 | 204.3 | 4.434 | 1082.6 | 0.989 | 241.5 |
SanDisk Extreme Pro UHS-II USB-C Reader SDDR-409 | 68.539 | 20.772 | 58.426 | 9.445 | 3.824 | 933.5 | 0.511 | 124.6 | 4.363 | 1065.1 | 0.649 | 158.4 |
The new, downgraded Lexar 633x U1 will be included in upcoming camera tests. The results from the speed tests will be included in the table below when available.
Lexar Professional 633x U1 64GB Tested in Camera | Write Speed (MB/s) |
---|---|
Sony A9 | 26.2 |
Nikon D7500 | 25.9 |
Canon 5D Mark IV | 25.8 |
Olympus E-M1 II | 25.6 |
Canon 77D | 25.5 |
Canon EOS R | 24.3 |
Canon EOS M5 | 23.8 |
Fuji X-T3 | 23.7 |
Canon Rebel T7i | 22.5 |
Panasonic GH5 | 22.4 |
Nikon Coolpix P1000 | 20.1 |
Cameras tested with this card: Canon EOS R, Canon 5D Mark IV, Canon 77D, Canon EOS M5, Canon Rebel T7i, Fuji X-T3, Nikon D7500, Nikon Coolpix P1000, Olympus E-M1 II, Panasonic GH5, Sony A9
Lexar Professional series memory cards have a limited lifetime warranty and are made in Korea.
The following table contains information encoded in the SD card.
Lexar Professional 633x U1 64GB SD — Internal Card Information | |
---|---|
Serial number (PSN) | 2484800108 |
Product Name (PNM) | 5WCGO |
Product Revision | 0.7 |
Manufacturer ID (MID) | 0x000028 |
OEM ID (OID) | BE |
Manufacture Date (MDT) | 06/2016 |
Total capacity | 64,155,025,408 bytes |
Compare prices on the Lexar Professional 633x U1 card. The lowest prices are highlighted in the table below. Prices are updated daily.
Card | Size GB | Lowest $ / GB | Prices | ||
---|---|---|---|---|---|
Amazon | B&H Photo | Adorama | |||
Lexar Professional 633x U1 | 16 | $0.81 | $13.00 | Check price | Check price |
Lexar Professional 633x U1 | 32 | $0.31 | $9.99 | Check price | Check price |
Lexar Professional 633x U1 | 64 | $0.20 | $12.99 | Check price | Check price |
Lexar Professional 633x U1 | 128 | $0.14 | $17.95 | Check price | Check price |