Finally, how much faster is the data transfer of the iPhone 15 Pro Max equipped with a USB-C connector compared to Lightning? I also compared the included cable and the high-speed transfer compatible cable.
The iPhone 15 series finally abolishes the Lightning connector that has been used since the iPhone 5 released in 2012, and is the first iPhone to use a USB-C connector. The A17 Pro chip of the higher-end iPhone 15 Pro/Pro Max is equipped with a new USB controller, achieving a maximum transfer speed of 10Gbps equivalent to USB 3.1 Gen2. Therefore, we verified how fast the data transfer speed via the iPhone 15 Pro Max's connector was.
iPhone 15 Pro and iPhone 15 Pro Max - Apple (Japan)
The appearance and benchmarks of iPhone 15 Pro Max have been reviewed in the following article.
iPhone 15 Pro Max photo & benchmark review, A17 Pro chip adopted & finally what is the potential of the top iPhone model equipped with USB-C? -GIGAZINE
You can understand what kind of photos and movies you can take with the iPhone 15 Pro Max camera by reading the article below.
I tried taking photos and movies with the iPhone 15 Pro Max camera that can shoot at 5x telephoto & up to 48 megapixels - GIGAZINE
To measure transfer speeds, we connected an iPhone 15 Pro Max, iPhone 15, and iPhone 14 Pro Max to a Windows PC and transferred three types of files three times each. The USB-C port of the Windows PC used supports USB 3.1 Gen 1, so the maximum transfer speed is 5Gbps.
We started the communication protocol analysis software
There was a report that ``The USB-C cable (right) that comes with the main unit does not support transfer speeds equivalent to USB 3,'' so when connecting the iPhone 15 Pro Max, please use the USB-C cable that comes with the main unit. Separately, I use Apple's Thunderbolt 4 (USB‑C) Pro cable (1m) (left), which supports data transfer speeds of up to 40Gbps. A Thunderbolt 4 (USB‑C) Pro cable (1m) was also used to connect the iPhone 15. In addition, a USB-C to Lightning cable (1m) is used to connect the iPhone 14 Pro Max.
The result of transferring the first data (approximately 352MB) is below. iPhone 15 Pro Max is clearly faster to transfer than iPhone 15. However, when using the included USB-C cable, the transfer speed is almost the same as the iPhone 15. The transfer speeds of the iPhone 15 and iPhone 14 Pro Max were almost the same.
| data 1 File size: 369,259,174 bytes | First time | Second time | Third time | Average transfer speed (Mbps conversion) |
| iPhone 15 Pro Max (When connecting Thunderbolt 4 cable) | 3.367077 seconds | 3.177247 seconds | 3.361733 seconds | 853.182Mbps |
| iPhone 15 Pro Max (When connecting the included USB-C cable) | 12.041004 seconds | 11.77027 seconds | 11.615213 seconds | 282.383Mbps |
| iPhone 15 | 11.381212 seconds | 11.665952 seconds | 11.478787 seconds | 244.791Mbps |
| iPhone 14 Pro Max | 11.960186 seconds | 12.994723 seconds | 11.748403 seconds | 230.270Mbps |
The result of transferring the second data (about 489MB) is below. The data file size is about 1.4 times the first one. The average transfer speed is the same as the first data, and it is still fastest when connecting the iPhone 15 Pro Max with a Thunderbolt 4 compatible cable, and is faster than when connecting with the included USB-C cable or connecting the iPhone 15. The speed was approximately 2.6 to 4 times faster.
| data 2 File size: 512,931,450 bytes | First time | Second time | Third time | Average transfer speed (Mbps conversion) |
| iPhone 15 Pro Max (When connecting Thunderbolt 4 cable) | 4.706650 seconds | 4.420473 seconds | 4.467621 seconds | 863.574Mbps |
| iPhone 15 Pro Max (When connecting the included USB-C cable) | 18.599601 seconds | 18.595498 seconds | 18.326679 seconds | 211.449Mbps |
| iPhone 15 | 11.481293 seconds | 12.107677 seconds | 11.891042 seconds | 330.892Mbps |
| iPhone 14 Pro Max | 17.634292 seconds | 17.051172 seconds | 16.796476 seconds | 228.042Mbps |
Finally, the result of transferring about 1GB of files looks like this. The iPhone 15 Pro Max nominally supports up to 10Gbps transfer, and the Windows PC side supports up to 5Gbps, so I would like more speed, but file transfer is clearly faster than using the included cable or connecting to the iPhone 15. I can confirm that it is possible.
| data 3 File size: 1,058,216,576 bytes | First time | Second time | Third time | Average transfer speed (Mbps conversion) |
| iPhone 15 Pro Max (When connecting Thunderbolt 4 cable) | 10.171112 seconds | 9.84693 seconds | 9.839162 seconds | 811.216Mbps |
| iPhone 15 Pro Max (When connecting the included USB-C cable) | 33.138849 seconds | 33.56866 seconds | 33.58365 seconds | 241.503Mbps |
| iPhone 15 | 33.931764 seconds | 33.564295 seconds | 31.999196 seconds | 243.435Mbps |
| iPhone 14 Pro Max | 32.709326 seconds | 32.300629 seconds | 37.853658 seconds | 235.463Mbps |
Below is a bar graph summarizing the verification results of transfer speed using three types of data. The unit of the horizontal axis is Mbps. It turns out that the iPhone 15 Pro Max can clearly transfer data faster than the iPhone 15 or the previous generation model with Lightning connection. However, with the included USB-C cable, the transfer speed is not much different from the Lightning connection, so you will need to prepare a separate cable that supports high-speed data transfer.
In this verification, we transferred to a Windows PC in order to accurately measure the transfer time, but by directly connecting a USB 3.1 Gen2 compatible SSD as external storage, 4K / 60fps shot with Apple ProRes It is possible to save huge files, such as videos, that can be up to several tens of GB in storage at high speed.
The battery of the iPhone 15 Pro Max dropped to 5%, so I tried charging it to 100% while measuring the voltage and current with
When I looked at the checker screen 5 minutes after connecting, the voltage was 8.716V, the current was 2.925A, and the charging input was 25.494W. The power supply has changed from Lightning to USB-C, but like the previous generation iPhone 14 series, the iPhone 15 series also seems to have a maximum input of 27W.
After approximately 1 hour and 30 minutes, the iPhone battery was charged to 100%.
According to the checker, the charging time from 5% to 100% was 1 hour 28 minutes 33 seconds, and the cumulative power was 20156 mWh.
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