Camera Memory Speed
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Sony SF-G Series UHS-II 128GB SDXC Card Review

Sony SF-G Series 300MB/s 128GB SDXC UHS-II Memory Card

Introduction

The Sony SF-G Series 128GB UHS-II card promises outstanding performance with read speeds up to 300MB/s and an amazing 299MB/s write speed claim. When the G Series SD cards were announced in February 2017 they claimed the highest write speed of any SD card to date. The cards are produced three capacities: 32, 64 and 128 GB. This review covers the largest of the three, the 128GB SDXC card, model SF-G128/T1 with UPC 027242904347.

The 128GB card is marked U3 for UHS Speed Class 3 which designates cards capable of maintaining at least 30MB/s write speeds for HD and 4K video recording. The back of the card shows it was made in Taiwan. Sony covers the SF-G Series SD cards with a 5-year limited warranty.

When considering a UHS-II card it should be noted that the high transfer rates are only available when used in a UHS-II device. The cards are compatible with Standard SD and UHS-I devices but the speed will be limited in these applications. The UHS-II interface uses a separate row of pins to provide in UHS-II mode. Cameras and card readers lacking those pins will be limited to UHS-I or lower speeds. The card supports SDR104 in UHS-I bus mode which limits speed to 104MB/s.

Sony SF-G Series 128GB SDXC UHS-II Memory Card back

Performance

The performance of the 128GB Sony SF-G UHS-II card was tested in USB 3.0 card readers. The card reached up to 297 MB/s sequential read speed in UHS-II card reader benchmarks. The highest sequential write speed was 273.2 MB/s. This nearly matches the 300MB/s read speed advertised by Sony, but the write speed was slightly off the 299MB/s claim. The highest speeds were seen using the Sony MRW-S1 UHS-II SD Card Reader. In UHS-I mode the Sony G Series card reached 96.8 MB/s read and 93.3 write speeds.

Card: Sony SF-G 300MB/s 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 SF-G 300MB/s 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 Reader296.963273.245223.2133.57210.4352547.71.744425.711.2912756.61.549378.1
Sony S1 High Speed UHS-II Reader/Writer295.874272.393234.7563.67010.7722629.91.789436.711.9752923.71.546377.4
SanDisk Extreme Pro SD UHS-II USB-C Reader280.143253.954221.9863.30411.6062833.51.851452.012.3083005.01.610393.0
SanDisk Extreme Pro SD UHS-II Reader/Writer276.487253.985220.5523.31211.5472819.11.745426.112.2872999.71.912466.8
Lexar Professional Workflow SR2 UHS-II272.818245.367221.2483.56713.0203178.81.796438.513.6313328.02.007490.0
Lexar LRWM04U-7000 UHS-II Reader268.659243.346221.8383.43711.7462867.61.802440.013.3323255.01.965479.8
Lexar Professional Dual Slot UHS-II Card Reader247.277225.573200.7093.40213.5083297.91.758429.214.4173519.81.817443.5
Transcend Multi-Card Reader RDF9246.985225.549199.4623.70013.5313303.41.717419.314.3903513.21.958478.0
Kingston FCR-HS4 Card Reader246.405224.127200.5093.38313.3793266.41.705416.314.4073517.41.833447.6
Kingston MobileLite G4 UHS-II244.253220.382198.5023.47213.6313327.81.748426.714.6553578.01.868456.0
Sony MRW-E90 XQD 2.0 / SD UHS-II Card Reader243.402221.312201.9173.42311.5052808.91.820444.312.5603066.31.651403.0
Delkin Multi-Card CFast SD UHS-II microSD Reader241.914234.476187.7423.40911.8782899.91.778434.114.1253448.41.753427.9
Delkin Dual Slot SD UHS-II and CF Card Reader241.858220.869199.9443.40713.4833291.91.679410.014.6883586.01.833447.4
SanDisk Extreme Pro UHS-II SD Reader/Writer240.196219.804196.4343.31513.8563382.71.788436.414.6613579.31.818443.9
Delkin Travel Reader96.78692.41088.7002.9099.7392377.81.700415.110.0952464.71.728422.0
Transcend Multi-Card Reader RDF8 Black95.81393.22390.3943.2048.9422183.01.686411.69.5182323.81.742425.2
Delkin Universal Memory Card Reader95.70893.26590.2303.0328.8772167.21.538375.49.4522307.61.794438.0
Transcend SD Card Reader RDF5 Black94.85191.57188.4513.0776.9821704.71.683411.07.1341741.71.698414.6
SanDisk ImageMate All-In-One USB 3.093.83290.27080.1102.9725.3671310.21.746426.35.4041319.21.339327.0

The 128GB G Series UHS-II card will be tested in cameras. When available, the results for write speed in cameras will be added to the table below.

Sony SF-G 300MB/s UHS-II 128GB
Tested in Camera
Write Speed
(MB/s)
Sony A9147.1
Panasonic GH591.8
Canon Rebel T7i81.0
Canon 77D81.0
Nikon D750080.5

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

The following table contains information encoded in the SD card.

Sony SF-G 300MB/s UHS-II 128GB SD — Internal Card Information
Serial number (PSN)3663438148
Product Name (PNM)G G1
Product Revision4.2
Manufacturer ID (MID)0x000027
OEM ID (OID)PH
Manufacture Date (MDT)02/2017
Total capacity123,748,745,216 bytes

Available sizes and prices

Compare prices on the Sony SF-G UHS-II SD card. The lowest prices are highlighted in the table below. Prices are updated daily.

CardSize
GB
Lowest
$ / GB
Prices
AmazonB&H PhotoAdorama
Sony SF-G UHS-II SD32$2.06$65.97$65.99$65.99
Sony SF-G UHS-II SD64$1.87$119.96$119.99$119.99
Sony SF-G UHS-II SD128$1.80$229.99$229.99$229.99