Camera Memory Speed
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Sony M Series 128GB SDXC UHS-II U3 Memory Card Review Review

Sony M Series 128GB SDXC UHS-II U3 Memory Card

Introduction

Sony M Series UHS-II cards offer high read speeds at a lower price point compared with the G Series UHS-II memory cards. The M Series SD cards are rated 260MB/s read and 100MB/s write speeds. While the write speed is in line with UHS-I cards, this is a UHS-II card and reaches nearly three times the download speed of any UHS-I card. The card is backwards compatible and operates in UHS-I mode in devices that do not support UHS-II. Its speed will be limited depending on the device.

The M Series 128GB SDXC card carries the UHS Speed Class 3 (U3) designation on its label. It is rated to sustain 30MB/s write speed for recording HD and 4K video. The card is also well suited to mirrorless and DSLR cameras where extended continuous shooting is required. Sony M Series SD cards are available in 32, 64 and 128 GB sizes. The 128GB SDXC card model SF-M128/T with UPC 027242898103 is covered in this review. The packaging has an additional 2017-03 label and a green dot sticker.

Sony M Series 128GB SDXC UHS-II U3 Memory Card back

Performance

The 128GB read and write performance was evaluated in various memory card readers. The 128GB M Series card exceeded is 260MB/s read speed rating, posting a 295.3 MB/s sequential read benchmark. The sequential write speed reached up to 95.1 MB/s, which is slightly below the 100MB/s write speed rating.

Card: Sony M Series UHS-II 128GB
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

Sony M Series UHS-II 128GB
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
Delkin Black Rugged Card Reader295.29092.671209.2621.12111.3762777.32.189534.512.6203080.92.003489.1
SanDisk Extreme Pro SD UHS-II Reader/Writer277.58593.824200.5760.87612.4743045.32.437595.014.6963588.02.040498.0
SanDisk Extreme Pro SD UHS-II USB-C Reader275.39891.252200.1100.86112.5303059.02.251549.514.4013515.91.945475.0
Lexar Professional Workflow SR2 UHS-II273.45893.807202.6570.98613.6803340.02.369578.514.6363573.22.246548.3
Lexar LRWM04U-7000 UHS-II Reader272.14593.141204.8540.90614.1433452.92.325567.615.6423818.91.990485.9
Sony S1 High Speed UHS-II Reader/Writer271.93493.874198.1070.92611.8642896.52.440595.813.5413305.82.353574.5
Delkin Dual Slot SD UHS-II and CF Card Reader249.15793.707183.2261.00716.3653995.32.264552.617.3594237.92.767675.6
Lexar Professional Dual Slot UHS-II Card Reader248.21395.057181.2100.99514.3273497.82.542620.716.4644019.52.200537.2
Sony MRW-E90 XQD 2.0 / SD UHS-II Card Reader248.00892.663184.6940.89213.1883219.72.449597.915.1963709.92.112515.7
Kingston FCR-HS4 Card Reader247.80293.765184.6330.98215.0033662.92.592632.917.2254205.32.002488.9
ProMaster Professional Dual Card Reader SD UHS-II247.68593.665182.0870.96114.4793534.92.492608.516.8684118.11.969480.6
Transcend Multi-Card Reader RDF9247.45293.589191.9511.14514.7593603.22.499610.217.0404160.22.117516.8
SanDisk Extreme Pro UHS-II SD Reader/Writer242.44593.406178.1090.98314.6193569.22.518614.716.9814145.72.659649.1
Kingston MobileLite G4 UHS-II240.08694.500179.2291.00514.3093493.32.542620.717.0244156.22.403586.6
Delkin Multi-Card CFast SD UHS-II microSD Reader217.38993.648174.9960.86813.5543309.12.007490.016.9344134.42.232544.9
Transcend Multi-Card Reader RDF8 Black96.60779.87385.8780.6909.0862218.22.048500.110.6762606.51.889461.2
Delkin Travel Reader96.53680.53683.7740.7969.2092248.32.250549.410.7002612.21.977482.6
Delkin Universal Memory Card Reader96.43073.60585.3780.7419.0282204.11.925470.110.5292570.61.980483.4
Transcend SD Card Reader RDF5 Black95.57781.53884.3680.8546.7131638.91.766431.27.2431768.41.944474.5
SanDisk ImageMate All-In-One USB 3.093.66578.72875.9090.7485.1881266.71.696414.25.4651334.21.502366.6

Real world performanced was tested in cameras. In extended continuous shooting the Sony M Series SD card reached above 90MB/s in the fastest UHS-II camera. In UHS-I cameras it maintained around 80MB/s write speed average at best. Additional camera results will be added below as the card is tested in more cameras.

Sony M Series UHS-II 128GB
Tested in Camera
Write Speed
(MB/s)
Sony A992.2
Canon Rebel T7i80.2
Canon 77D79.2
Nikon D750078.8
Panasonic GH573.3

Cameras tested with this card: Canon 77D, Canon Rebel T7i, Nikon D7500, Panasonic GH5, Sony A9

This Sony SD card is covered by a 5-year limited warranty. The card is made in Taiwan.

The following table contains information encoded in the SD card.

Sony M Series UHS-II 128GB SD — Internal Card Information
Serial number (PSN)3662947363
Product Name (PNM)SD128
Product Revision4.2
Manufacturer ID (MID)0x000027
OEM ID (OID)PH
Manufacture Date (MDT)02/2017
Total capacity128,345,702,400 bytes

Available sizes and prices

Compare prices on the Sony M Series SD card. The lowest prices are highlighted in the table below. Prices are updated daily.

CardSize
GB
Lowest
$ / GB
Prices
AmazonB&H PhotoAdorama
Sony M Series SD32$0.89$33.28$28.51$34.99
Sony M Series SD64$0.87$56.27$55.99$59.95
Sony M Series SD128$0.78$99.99$99.99$99.99