Camera Memory Speed
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SanDisk Ultra 40MB/s 64GB Memory Card Review

SanDisk Ultra 40MB/s UHS-I SD Card 64GB SDXC

Introduction

In the SanDisk line of memory cards Ultra is the budget choice. It is intended for compact to mid-level point-and-shoot digital cameras. The SanDisk Ultra 40MB/s UHS-I is the latest version of the card. The 40MB/s is the read speed, while write speed is lower but "twice as fast as ordinary SD cards." According to SanDisk, ordinary means 5MB/s write speed, so this card must provide at least 10MB/s write speed, which is also the same minimum level of write performance other Class 10 cards must maintain. Ultra SD cards are available in 8, 16, 32, 64 and 128GB capacities. The 64GB SDXC version is reviewed here.

Performance

The Ultra 40MB/s 64GB SDXC card was benchmarked in various SD card readers. It exceeded its advertised read speed, reaching 47.9MB/s sequential read. Its sequential write speed measured between 14.9 and 16.1 MB/s in various readers. This is above the 10MB/s write SanDisk implies, but far from the speed offered by "high performance" SD cards.

Card: SanDisk Ultra 40MB/s 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

SanDisk Ultra 40MB/s 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
Lexar Professional Workflow SR147.88215.00945.0180.6925.0141224.01.996487.44.4151078.01.858453.6
Transcend SD Card Reader RDF5 Black47.77816.09744.8630.6674.2931048.01.651403.03.784923.91.642400.8
Lexar LRWM04U-7000 UHS-II Reader47.75415.64844.8110.7035.1761263.61.917468.04.2021025.91.877458.3
Lexar Professional Workflow SR2 UHS-II47.75415.62944.4460.7394.7951170.61.933471.94.3441060.51.875457.8
Kingston MobileLite G4 UHS-II47.74115.56344.8330.6625.5261349.21.925470.04.6241129.01.855453.0
SanDisk Extreme Pro UHS-II SD Reader/Writer47.73215.86745.2800.6335.5571356.61.944474.64.6451134.11.876457.9
Transcend Multi-Card Reader RDF947.63914.85544.5040.7054.6841143.61.874457.44.1991025.01.886460.6
Delkin Dual Slot SD UHS-II and CF Card Reader47.59316.19444.4600.6444.7661163.61.932471.74.1891022.71.866455.7
Kingston FCR-HS4 Card Reader47.56314.93144.5550.7154.6111125.81.930471.24.2371034.31.871456.7
Delkin Travel Reader47.55716.10143.9230.6574.8341180.11.914467.44.2201030.21.877458.2
Lexar Professional Dual Slot UHS-II Card Reader47.55415.65142.7290.6554.5941121.51.791437.24.1611015.91.818444.0
Lexar Professional Dual Slot Reader47.53714.90644.5040.6745.1681261.72.012491.24.1461012.11.935472.5
Transcend Multi-Card Reader RDF8 Black47.50315.89145.1600.7655.1761263.81.826445.94.4931097.01.802440.0
Delkin Universal Memory Card Reader47.20316.12142.9810.6164.5061100.21.798438.94.027983.31.790436.9
Kingston Multi-Card Reader FCR-HS347.18414.86337.1420.7235.4271324.91.907465.54.6011123.41.917468.1
SanDisk ImageMate All-In-One USB 3.046.88016.15442.2810.6813.536863.31.546377.43.186777.81.492364.4
Sony MRW-E90 XQD 2.0 / SD UHS-II Card Reader46.37315.70841.9360.6663.796926.81.763430.44.2061026.81.753428.0

In camera tests the SanDisk Ultra 40MB/s card maintained similar write performance in many cameras. This is enough to satisfy basic needs, but not enough for extended continuous shooting that exceeds a camera's buffer capacity. This level of performance is expected given the card's target market. For serious enthusiasts and DSLR owners there are better choices, such as the SanDisk Extreme 60MB/s card that offers a much higher write speed.

SanDisk Ultra 40MB/s 64GB
Tested in Camera
Write Speed
(MB/s)
Canon Rebel T6i/T6s15.3
Canon 5D Mark IV14.9
Nikon D50014.9
Canon 80D14.6
Fuji X-Pro214.5
Pentax K-3 II14.5
Fuji X-T1014.4
Canon 5Ds14.3
Nikon D550014.2
Nikon D720013.8
Sony A7R II13.7
Sony A600013.5
Sony A630012.9
Nikon D710012.8
Olympus PEN-F12.5
Olympus E-M5 II12.3

Cameras tested with this card: Canon 5D Mark IV, Canon 5Ds, Canon 80D, Canon Rebel T6i/T6s, Fuji X-Pro2, Fuji X-T10, Nikon D500, Nikon D7200, Nikon D7100, Nikon D5500, Olympus E-M5 II, Olympus PEN-F, Pentax K-3 II, Sony A7R II, Sony A6000, Sony A6300

The following table contains information encoded in the SD card.

SanDisk Ultra 40MB/s 64GB SD — Internal Card Information
Serial number (PSN)263115400
Product Name (PNM)SL64G
Product Revision8.0
Manufacturer ID (MID)0x000003
OEM ID (OID)SD
Manufacture Date (MDT)11/2014
Total capacity63,864,569,856 bytes

Available sizes and prices

Compare prices on the SanDisk Ultra 40MB/s card. The lowest prices are highlighted in the table below. Prices are updated daily.

CardSize
GB
Lowest
$ / GB
Prices
AmazonB&H PhotoAdorama
SanDisk Ultra 40MB/s SD8$0.75$10.19$5.99$7.95
SanDisk Ultra 40MB/s SD16$0.58$9.30Check price
SanDisk Ultra 40MB/s SD32$0.50$15.99Check price$17.95
SanDisk Ultra 40MB/s SD64$0.39$25.20Check price$34.95
SanDisk Ultra 40MB/s SD128$0.42$53.94Check price$59.95