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

Lexar Professional 633x 64GB microSDXC UHS-I U1 Memory Card Review

Lexar Professional 633x 64GB UHS-I microSDXC Memory Card Front

Introduction

The Lexar Professional 633x microSD 64GB card provides UHS-I speeds up to 95MB/s (read) for fast transfers. Lexar does not quote a read speed, although the UHS Speed Class 1 (U1) rating means this card must support at least 10MB/s continuous write speed. The U1 are suitable for high definition video recording. Lexar 633x microSD cards are offered in 16GB, 32, 64, 128 and 200GB capacities. The 64GB microSDXC card (LSDMI64GBB1NL633R) is tested in this review.

Lexar Professional 633x series memory cards are covered by a limited lifetime warranty. The 64GB microSDXC card tested is marked "Made in Korea" on the back side.

Lexar Professional 633x 64GB UHS-I U1 micro SDXC Memory Card Back

Included microSD Memory Card Reader

Lexar Professional 633x microSD cards are sold with a microSD memory card reader. This compact reader supports UHS-I microSD cards. A separate test of the included Lexar LRWM03U-7000 microSD card reader can be found in the card reader reviews.

Lexar LRWM03U-7000 microSD UHS-I Memory Card Reader

Performance

In card reader benchmark tests the 64GB 633x microSDXC card reached up to 96.8 MB/s sequential read speed, just above the 95MB/s read speed claim by Lexar. Maximum sequential write speed measured 28.3 MB/s.

Card: Lexar Professional 633x microSDXC 64GB
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 microSDXC 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
SanDisk Extreme Pro SD UHS-II Reader/Writer97.97028.37785.08113.8025.1701262.30.783191.35.6311374.70.797194.5
Sony S1 High Speed UHS-II Reader/Writer97.96128.77184.87014.8714.8321179.70.827202.05.5401352.61.024250.1
Lexar Professional Workflow SR2 UHS-II96.86628.31787.58614.7506.5691603.70.996243.17.6381864.81.207294.7
Lexar LRWM04U-7000 UHS-II Reader96.85728.22487.89812.5786.6081613.20.996243.27.6381864.81.198292.4
Lexar C1 USB-C microSD Reader96.08528.44785.23613.8915.3191298.70.877214.05.9671456.81.083264.3
Delkin Multi-Card CFast SD UHS-II microSD Reader95.37728.85087.19215.3136.6351619.91.004245.17.7821899.91.201293.1
SanDisk Extreme Pro UHS-II SD Reader/Writer95.28228.20088.34913.8846.7551649.20.990241.77.6751873.81.219297.5
Kingston FCR-HS4 Card Reader94.73127.84887.36713.5176.5791606.30.990241.67.6481867.11.189290.2
Lexar Professional Dual Slot UHS-II Card Reader94.72228.02987.61012.0846.0751483.20.914223.16.8841680.61.086265.2
Lexar LRWM03U-7000 UHS-I microSD Reader94.56028.08886.24613.8115.8201420.80.935228.36.6511623.81.183288.9
Transcend SD Card Reader RDF5 Black94.25428.13485.83613.8425.0931243.40.609148.85.5041343.80.685167.2
Delkin Universal Memory Card Reader94.13628.13886.50213.7596.0621480.00.914223.27.0621724.21.170285.6
Lexar LRWM05U-7000 UHS-II microSD Reader92.46727.98183.84413.2636.0781483.90.897219.17.0251715.01.171285.9
Sony MRW-E90 XQD 2.0 / SD UHS-II Card Reader92.41828.16384.10613.9515.9761458.90.901219.97.1731751.21.160283.1
SanDisk ImageMate All-In-One USB 3.092.27228.16377.12613.3924.059990.90.790192.94.2861046.30.933227.8
SanDisk microSD UHS-II USB 3.0 Reader68.77319.02459.80110.3564.7731165.20.27567.25.4031319.00.13733.5
Delkin Black Rugged Card Reader68.50820.91358.6289.4153.768920.00.21051.24.1861021.90.15337.5
Delkin Travel Reader55.54827.46151.85814.8416.1571503.20.613149.66.8951683.30.29872.7
Delkin Dual Slot SD UHS-II and CF Card Reader55.36628.08852.93315.1776.1231494.80.921224.96.8571674.00.38794.5
Kingston MobileLite G4 UHS-II55.34028.13153.06210.2176.2251519.70.915223.56.8991684.20.513125.2
Transcend Multi-Card Reader RDF955.28427.92052.87213.7596.1391498.80.632154.26.8821680.20.33381.4

The 633x 64GB microSD card will be tested in digital cameras and the results will be shown in the table below when available.

Lexar Professional 633x microSDXC 64GB
Tested in Camera
Write Speed
(MB/s)
Nikon D750025.3
Sony A925.0
Olympus E-M1 II22.8
Panasonic GH522.0
Nikon D560021.0
Canon Rebel T7i20.5
Canon 5D Mark IV19.5
Canon 77D19.1

Cameras tested with this card: Canon 5D Mark IV, Canon 77D, Canon Rebel T7i, Nikon D7500, Nikon D5600, Olympus E-M1 II, Panasonic GH5, Sony A9

The following table contains information encoded in the SD card.

Lexar Professional 633x microSDXC 64GB microSD — Internal Card Information
Serial number (PSN)2976583486
Product Name (PNM)
Product Revision0.2
Manufacturer ID (MID)0x000028
OEM ID (OID)BE
Manufacture Date (MDT)10/2015
Total capacity64,155,025,408 bytes

Available sizes and prices

Compare prices on the Lexar Professional 633x microSD card. The lowest prices are highlighted in the table below. Prices are updated daily.

CardSize
GB
Lowest
$ / GB
Prices
AmazonB&H PhotoAdorama
Lexar Professional 633x microSD16$0.53$8.50$11.95$11.95
Lexar Professional 633x microSD32$0.27$8.50$17.95$17.95
Lexar Professional 633x microSD64$0.44$59.07$27.95$27.95
Lexar Professional 633x microSD128$0.27$35.00$54.94$54.94
Lexar Professional 633x microSD200$0.53$105.00Check priceCheck price
Lexar Professional 633x microSD256$0.78$199.00Check price$199.95