iPhone 15 Pro Max Mediocre 100 MBps (800 Mbps) transfer speeds from PC to iPhone 15 Pro Max

[d5aqoëp]

I tried to transfer a 15 Gb video first from my iPhone 15 PM to PC using iTunes and 3uTools.

It transferred to my PC at roughly 100 MBps or (800 Mbps)

Then the same file I tried to copy back to VLC folder on iPhone using above 2 programs and it was same 100 MBps speed.

I am using a USB4 cable which does around 2000 MBps (16 Gbps) when using Yottamaster Nvme enclosure which is USB 3.2 Gen 2x2 (20 Gbps)

I tried switching from my PC's USB 3.2 Gen 2 (10Gbps) port but still it was 100 MBps to and from iPhone. Then I also used my PC's thunderbolt port and got same result.

I am on latest 17.1.1 iOS version of my phone.
What am I missing? Why are the transfer speeds so low? Internal storage benchmarks at 1500 MBps in antutu benchmark and iPhone 15 PM has port speed of 10 Gbps.
I haven't seen a single youtube influencer test real world performance.

So what gives? Why is the transfer speed restricted to almost 10th of it's rated speed?

 

[colinwil]

It’s interesting. I’ve been seeing speeds of around 800 Mbps too with my IP15 Pro- eg. When backing up my phone to my Mac. And even less if I plug the USB cable into my Apple Studio Display instead of directly to my Mac Studio.

So I was wondering if Apple are limiting the USB speeds when transferring files for some reason, and only allowing max speed when, eg. Recording high resolution video to a USB-C attached drive (?)

It may not be relevant - but what sort of PC are you using?

 

[d5aqoëp]

It’s interesting. I’ve been seeing speeds of around 800 Mbps too with my IP15 Pro- eg. When backing up my phone to my Mac. And even less if I plug the USB cable into my Apple Studio Display instead of directly to my Mac Studio.

So I was wondering if Apple are limiting the USB speeds when transferring files for some reason, and only allowing max speed when, eg. Recording high resolution video to a USB-C attached drive (?)

It may not be relevant - but what sort of PC are you using?

Asus ProArt Z690 + i7 21700K

This motherboard has 2 Thunderbolt 4 ports and a usb 3.1 gen 2x2 ports

Another is Intel Nuc12 Pro which also has Thunderbolt 4 ports.