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

SanDisk Ultra 40MB/s 32GB SDHC UHS-I Memory Card Review

SanDisk Ultra 40MB/s SD Card

Introduction

The Ultra 40MB/s is the value choice in SD card storage from SanDisk. This Class 10 UHS-I compliant memory card supports a read speed of 40MB/s and write speed of at least 10MB/s. The Ultra SD is available in many capacities: 8, 16, 32 SDHC and 64 and 128GB SDXC. This review is for the SanDisk Ultra 40MB/s 32GB SDHC card.

Performance

When testing the SanDisk Ultra 40MB/s 32GB card the initial sample was found to have an unexpectedly high write speed. Because of this apparent anomaly, additional samples were obtained from different sources. After testing multiple samples it appears the high write speed may not be typical. Results for three different cards are included below.

The SanDisk Ultra 40MB/s cards were tested in a variety of USB 3.0 SD card readers. The read speed measured up to 47MB/s which is comfortably above the advertised speed. The write speed varied in different samples of the card. The first sample (Card 1) had significantly higher write speed than specification and reached 45MB/s sequential write. This is essentially the same as the SanDisk Extreme 45MB/s SD Card that was discontinued in late 2014. It is notably faster than the Ultra 64GB card and other Ultra cards that average between 15-20MB/s write speed. The card with unusual write speed has a manufacture date is 11/2014 and the product name encoded in the card (SL32G) is consistent with an Ultra card. The second and third sample cards had later manufacture dates. Both cards 2 and 3 had maximum write speeds between 19 to 20 MB/s.

Card 1

Card: SanDisk Ultra 40MB/s 32GB Card 1
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 32GB Card 1
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 SR147.87845.57045.65640.4609.2372255.03.046743.67.0501721.12.373579.3
Transcend SD Card Reader RDF5 Black47.78045.47445.65640.2337.1111736.02.486607.05.9321448.32.304562.5
Lexar LRWM04U-7000 UHS-II Reader47.75445.02546.52740.0159.9122419.83.066748.67.3861803.32.293559.9
Lexar Professional Workflow SR2 UHS-II47.75244.67346.18539.93610.0862462.43.055745.97.4011807.02.293559.8
Kingston MobileLite G4 UHS-II47.73844.96946.31439.9699.7562381.73.051744.97.2561771.42.343572.0
SanDisk Extreme Pro UHS-II SD Reader/Writer47.72545.03246.48939.98910.2832510.43.042742.77.3881803.62.382581.5
Kingston FCR-HS4 Card Reader47.60644.71946.22339.99510.0442452.13.051744.87.3701799.32.349573.5
Lexar Professional Dual Slot Reader47.53145.64246.33640.5189.4852315.83.909954.37.2331765.81.797438.7
Transcend Multi-Card Reader RDF8 Black47.49845.60246.29940.5449.6872365.13.518858.87.2911780.11.771432.3
Kingston Multi-Card Reader FCR-HS347.17842.79638.35232.87610.3752532.93.044743.27.3851803.02.324567.4
SanDisk ImageMate All-In-One USB 3.046.88044.41643.33737.6635.3071295.72.211539.84.6801142.72.063503.5

Card 2

Card: SanDisk Ultra 40MB/s 32GB Card 2
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 32GB Card 2
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
Transcend SD Card Reader RDF5 Black47.80219.88245.83411.4784.6751141.30.852208.04.9421206.60.948231.4
Lexar Professional Workflow SR147.80219.98845.91610.1445.4841338.80.927226.46.1451500.21.022249.6
Lexar Professional Workflow SR2 UHS-II47.39320.01545.5248.0565.9161444.30.931227.36.6551624.81.049256.1
Lexar LRWM04U-7000 UHS-II Reader47.39319.91445.6209.3226.1501501.50.942229.96.6971635.01.036252.9
Transcend Multi-Card Reader RDF947.29119.89745.6867.7516.0371473.90.915223.36.6941634.21.030251.4
Kingston FCR-HS4 Card Reader47.28420.02845.5541.6435.9311448.10.932227.56.6751629.71.033252.3
Delkin Travel Reader47.26319.86845.0937.6935.9901462.50.940229.46.7181640.21.050256.4
Lexar Professional Dual Slot Reader47.24820.00145.8198.4475.6191371.80.934228.16.2661529.81.041254.1
Delkin Dual Slot SD UHS-II and CF Card Reader47.24620.00345.6347.1216.0791484.20.938228.96.7371644.71.036252.9
Transcend Multi-Card Reader RDF8 Black47.23519.61545.8045.6505.5401352.60.888216.96.2431524.30.981239.5
Lexar Professional Dual Slot UHS-II Card Reader47.23519.90845.5989.6785.8891437.80.892217.96.6621626.41.019248.8
Delkin Universal Memory Card Reader47.22719.55245.9015.8805.5151346.50.894218.16.3821558.11.014247.5
SanDisk Extreme Pro UHS-II SD Reader/Writer47.22319.92545.5107.7615.9141443.80.942230.16.7211640.81.038253.4
Kingston MobileLite G4 UHS-II47.18419.81345.4958.1755.9031441.20.610148.96.6411621.30.646157.8
Kingston Multi-Card Reader FCR-HS346.75519.63637.7995.5295.9061441.90.934228.06.6791630.61.035252.7
Sony MRW-E90 XQD 2.0 / SD UHS-II Card Reader46.52519.91444.6425.3935.4991342.50.708172.86.4601577.10.769187.7
SanDisk ImageMate All-In-One USB 3.046.36619.52042.5145.1803.810930.20.820200.14.012979.60.896218.7

Card 3

Card: SanDisk Ultra 40MB/s 32GB Card 3
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 32GB Card 3
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
Transcend SD Card Reader RDF5 Black47.90419.69345.7608.4564.6111125.80.854208.44.9651212.20.953232.7
Lexar Professional Workflow SR147.81019.77445.9088.7675.4811338.10.922225.26.1491501.21.018248.6
Lexar LRWM04U-7000 UHS-II Reader47.39819.67045.5328.6225.9811460.10.935228.26.6451622.21.028250.9
Lexar Professional Workflow SR2 UHS-II47.39519.73045.81911.4316.2831533.90.932227.66.7961659.21.040253.8
Lexar Professional Dual Slot Reader47.34219.82245.9167.7485.6531380.20.929226.76.4371571.61.015247.7
Kingston FCR-HS4 Card Reader47.24219.79945.5247.7905.9011440.70.921224.96.7081637.81.044254.8
SanDisk Extreme Pro UHS-II SD Reader/Writer47.22719.73045.5107.7425.7911413.80.938228.96.6901633.31.038253.5
Transcend Multi-Card Reader RDF8 Black47.22519.76045.79710.0635.6281374.10.882215.46.2091515.90.982239.8
Kingston MobileLite G4 UHS-II47.18419.71945.4997.7365.9591454.80.928226.66.7031636.61.035252.7
Kingston Multi-Card Reader FCR-HS346.74319.77837.7747.5566.0311472.50.933227.86.6721629.01.046255.4
SanDisk ImageMate All-In-One USB 3.046.37019.72542.5087.5043.810930.20.819199.94.021981.60.892217.8

The performance of Card 1 and Card 2 were tested in cameras. As in the benchmark test, Card 1 card performed similar to the Extreme 45MB/s card. Both Ultra 32GB Card 1 and Card 2 were tested in the Canon T6i and T6s. Their performance was markedly different. Card 2 averaged 18.8 MB/s write speed, whereas Card 1 averaged 41.0 MB/s. Because the Card 1 sample does not appear typical of Ultra 40MB/s cards, it will not be included in future tests. Instead, Card 2 will be included in future camera tests.

Card 1

SanDisk Ultra 40MB/s 32GB Card 1
Tested in Camera
Write Speed
(MB/s)
Canon Rebel T6i/T6s41.0
Nikon D720040.7
Nikon D710039.9
Nikon D550039.9
Olympus E-M5 II38.1
Sony A600035.2

Cameras tested with this card: Canon Rebel T6i/T6s, Nikon D7200, Nikon D7100, Nikon D5500, Olympus E-M5 II, Sony A6000

Card 2

SanDisk Ultra 40MB/s 32GB Card 2
Tested in Camera
Write Speed
(MB/s)
Canon 80D18.8
Canon Rebel T6i/T6s18.8
Canon 5D Mark IV18.6
Fuji X-Pro218.5
Canon 5Ds18.4
Pentax K-3 II17.6
Nikon D50017.6
Sony A7R II17.3
Sony A630016.8
Olympus PEN-F13.5
Fuji X-T108.4

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, Olympus PEN-F, Pentax K-3 II, Sony A7R II, Sony A6300

Comparing the internal card information between samples, the cards differ in manufacture date. Card 1 has a different total capacity from the other two samples. Curiously, the capacity of Card 1 is identical to that of the Extreme 45MB/s 32GB card, with which it shares performance characteristics.

Card 1

The following table contains information encoded in the SD card.

SanDisk Ultra 40MB/s 32GB Card 1 SD — Internal Card Information
Serial number (PSN)262702444
Product Name (PNM)SL32G
Product Revision8.0
Manufacturer ID (MID)0x000003
OEM ID (OID)SD
Manufacture Date (MDT)11/2014
Total capacity31,914,983,424 bytes

Card 2

The following table contains information encoded in the SD card.

SanDisk Ultra 40MB/s 32GB Card 2 SD — Internal Card Information
Serial number (PSN)1448088957
Product Name (PNM)SL32G
Product Revision8.0
Manufacturer ID (MID)0x000003
OEM ID (OID)SD
Manufacture Date (MDT)03/2015
Total capacity31,925,993,472 bytes

Card 3

The following table contains information encoded in the SD card.

SanDisk Ultra 40MB/s 32GB Card 3 SD — Internal Card Information
Serial number (PSN)537003831
Product Name (PNM)SL32G
Product Revision8.0
Manufacturer ID (MID)0x000003
OEM ID (OID)SD
Manufacture Date (MDT)04/2015
Total capacity31,925,993,472 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$0.99$9.95$7.99$7.95
SanDisk Ultra 40MB/s SD16$0.58$9.30Check price
SanDisk Ultra 40MB/s SD32$0.52$16.69Check price$17.95
SanDisk Ultra 40MB/s SD64$0.42$26.92Check price$34.95
SanDisk Ultra 40MB/s SD128$0.42$53.94Check price$59.95