Lexar's 633x UHS-I offering has been downgraded from U3 to U1 performance. The write speed that was previously advertised at 45MB/s has been cut to 20MB/s. The card can no longer sustain the 30MB/s continuous write speed required for the UHS-I Class 3 (U3) speed rating, so the card now carries the U1 rating, meaning it can sustain at least 10MB/s write performance for continuous recording.
The Lexar 633x U1 128GB card is offered in 16, 32, 64 and 128GB capacities (256 and 512GB cards retain the U3 speed rating). This test covers the 128GB capacity SDXC card (LSD128GCB1NL633). The card is "made in Korea" as noted on the back side.
The 633x U1 128GB SDXC card wast tested in various USB 3.0 card readers using performance benchmark tests. Its sequential read speed reached 96.7 MB/s, nearly as fast as the old card. But the write speed measured 29.6 MB/s in the fastest benchmark, well below the 68.7 MB/s high mark set by the U3-rated card it replaces. While the write speed is above the 20MB/s quoted by Lexar it is quite a downgrade from the previous 633x U3 card.
Card: Lexar Professional 633x U1 128GB 128 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 633x U1 128GB 128 GB|
Card Reader Benchmarks
|Lexar Professional Workflow SR2 UHS-II||96.714||28.593||85.577||11.827||5.363||1309.3||1.166||284.7|
|Lexar LRWM04U-7000 UHS-II Reader||96.705||28.636||85.392||11.579||5.323||1299.5||1.202||293.4|
|Lexar Professional Dual Slot UHS-II Card Reader||95.040||28.852||85.420||11.435||5.405||1319.5||1.140||278.3|
|SanDisk Extreme Pro UHS-II SD Reader/Writer||94.945||28.833||85.752||11.680||5.344||1304.7||1.190||290.6|
|Kingston MobileLite G4 UHS-II||94.894||28.960||85.738||11.362||5.346||1305.1||1.201||293.3|
|Transcend Multi-Card Reader RDF8 Black||94.885||28.639||84.884||11.945||5.024||1226.7||0.527||128.7|
|Delkin Dual Slot SD UHS-II and CF Card Reader||94.774||29.005||85.766||11.816||5.397||1317.7||1.200||292.9|
|Kingston FCR-HS4 Card Reader||94.714||28.600||85.392||11.514||5.345||1304.9||1.197||292.2|
|Delkin Travel Reader||94.586||28.737||83.566||11.623||5.295||1292.7||1.215||296.6|
|Transcend Multi-Card Reader RDF9||94.364||28.651||85.420||11.912||5.389||1315.6||1.166||284.6|
|Delkin Universal Memory Card Reader||94.229||29.625||84.884||11.552||4.973||1214.1||1.104||269.6|
|Transcend SD Card Reader RDF5 Black||93.908||28.579||83.928||11.498||4.216||1029.2||1.038||253.4|
|Sony MRW-E90 XQD 2.0 / SD UHS-II Card Reader||93.107||28.976||82.524||12.080||5.230||1276.8||1.125||274.7|
|SanDisk ImageMate All-In-One USB 3.0||91.771||28.453||75.984||10.852||3.635||887.4||0.995||242.9|
The 633x U1 card will be included in digital camera speed tests. When the results are available they will be added to the chart below.
Cameras tested with this card:
Lexar Professional series memory cards are backed by a lifetime warranty.
The following table contains information encoded in the SD card.
|Lexar Professional 633x U1 128GB SD — Internal Card Information|
|Serial number (PSN)||1411187524|
|Product Name (PNM)||5WCGO|
|Manufacturer ID (MID)||0x000028|
|OEM ID (OID)||BE|
|Manufacture Date (MDT)||06/2016|
|Total capacity||128,042,663,936 bytes|
Compare prices on the Lexar Professional 633x U1 card. The lowest prices are highlighted in the table below. Prices are updated daily.
$ / GB
|Lexar Professional 633x U1||16||$0.48||$7.75|
|Lexar Professional 633x U1||32||$0.37||$11.75|
|Lexar Professional 633x U1||64||$0.34||$21.95|
|Lexar Professional 633x U1||128||$0.31||$39.99|