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Hey everyone,
I’m having an issue with my Samsung T7 SSD on my Windows 11 PC — it’s only connecting at USB 2.0 speeds (480 Mb/s) no matter what I do. On my MacBook, the exact same drive and cable transfer a 75 GB file in around 2 minutes (~900 MB/s), but on Windows it takes about 30 minutes (~42 MB/s).
Here’s my setup:
What I’ve tried so far:
Installed the latest AMD chipset drivers from Gigabyte’s website
Installed the latest ITE USB driver
Verified BIOS is up to date
Flipped and reseated the USB-C cable
Tried another certified USB 3.2 Gen 2 cable
Updated T7 firmware using Samsung Magician
Checked Device Manager (shows “AMD USB 3.10 eXtensible Host Controller – 1.20 (Microsoft)”)
Interface: USB 2.0 PC Max: USB 3.2 / Slot Max: USB 2.0 / Drive Max: USB 3.0
So it seems like Windows is only negotiating the drive at USB 2.0, even though the motherboard port itself supports 10Gbps (USB 3.2 Gen 2) and works fine with other devices.
Any idea what could be causing this, or how to make the T7 connect at full USB 3.2 speed?
Thanks in advance.
Some screenshots from Magician and Device Manager:
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I have the same issue, initially it was working but now stuck at 2.0. I have latest bios and firmware and latest windows release.
I can’t exactly follow the instructions related to power management as the setting have changed.
PC Max USB 3.2 / slot max USB 2.0 / Device Max 3.2
performance 43MB/s read 41 MB/s write
any help appreciated
Hi Adit,
Don't worry! Please, could you share again the method you tried earlier? It'll be useful to not repeat any step, and also to use the information in case it helps me to investigate further.
I have documented all the steps in the other comment with our previous conversation. Could you refer to that? That is everything I have tried so far
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j'ai exactement le même problème et toute essayé le disque marche bien sur autre pc ma config aorus B550 et samsung t7 tout à jour.
ps: j'ai ce message la sur évènement : Les paramètres de l’appareil pour SWD\WPDBUSENUM{5abe912f-b6f0-11f0-aa6a-00155da3debf}#0000000001000000 n’ont pas été migrés à partir de l’installation précédente du système d’exploitation en raison d’une correspondance partielle ou ambiguë entre les appareils.
Hi Adit,
On Windows that most often happens because the USB controller or hub has been put into a low-power state and the link re-negotiates at USB 2.0. Try to reset negotiation and prevent the power down, then test again.
First unplug the T7. Open Settings, type Power Plan in the search box and open Edit power plan. Click Change advanced power settings. Expand USB settings, then USB selective suspend setting, set it to Disabled for all power modes, apply and close. Now open Device Manager, expand Universal Serial Bus controllers, open the properties of every entry named USB Root Hub or USB 3.x Hub, go to Power Management, clear Allow the computer to turn off this device to save power, press OK for each. Now do a full shutdown with Win+X, Windows Terminal (Admin), run: shutdown /s /t 0. Wait 10 seconds, power on, let Windows fully load, then plug the T7 into the rear Type-C port.
Right after plugging in, open Samsung Magician and check Interface. It should show USB 3.x, and a copy of a single large file should give hundreds of MB/s. If it still shows USB 2.0 after this exact process, tell me and we will move into the next step.
Hey Fransisco,
Unfortunately that did not fix the issue. The drive is still using 2.0 in Magician. Speeds are also still 40mbps
Hey, thanks for your help, but unfortunately, it did not work. I followed all your steps to the T, but it is still showing me speeds of 2.0 on Samsung Magician. Can you please let me know any other steps I can take to fix this issue?
Thanks for sticking with it, Adit.
Now try to do a clean reset of the USB stack for the controller the T7 uses. When a port gets stuck enumerating at High-Speed, removing the hub and controller and letting Windows rebuild them is the most reliable fix for the symptom you see in Magician.
First, unplug the T7 and leave only keyboard and mouse connected. Open Device Manager. Choose View > Devices by connection. Expand ACPI x64-based PC > Microsoft ACPI-Compliant System > PCI Express Root Complex. Find AMD USB 3.10 eXtensible Host Controller - 1.20 Microsoft. Expand it so you can see its USB Root Hub entries.
Right-click each USB Root Hub USB 3.0 under that controller and select Uninstall device. If you are asked to delete driver software, leave the box unchecked. Still under the same tree, right-click AMD USB 3.10 eXtensible Host Controller - 1.20 Microsoft and select Uninstall device.
Restart the PC. Windows will reinstall the controller and hubs automatically. Wait a full minute after the desktop appears so the driver finishes enumerating. Now plug the T7 directly into a rear motherboard USB-C port that is labeled 10 Gbps. Give Windows a few seconds to set up the device.
Open Samsung Magician and check Interface. You should now see USB 3.x. If it still shows USB 2.0, tell me exactly which node in Devices by connection the T7 lands under after this reset and we will take the next step.
I went through process and uninstalled all the devices you mentioned. After restarting and waiting a minute all the devices are appearing in my device manager again. I reconnected the drive, but it still shows 2.0 speeds in magician
Cool! I'm glad to hear that.Please, feel free to reach out again if you ever have another question or issue. :)
Hey Francisco, the issue has not been resolved. I am still not receiving the correct speeds from my drive
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LOL to Francisco hallucinating a success from nowhere.
I am also having the exact same issue, though my Samsung Magician thinks that my PC Max is USB 2.0 even though Device Manager clearly shows my T9 plugged in to VIA USB 3 Hub under the VIA USB 3 Root Hub under the VIA UAV eXtensible Host Controller.
Even after checking all my settings that Francisco mentioned above, they were all already correct, but I uninstalled everything as per instruction with no change.
Is Samsung shipping their T7 and T9 with 2.0 cables???
It was never the drive, the cable, the drivers, or Windows. On my board (Gigabyte B650I AORUS Ultra) it’s specifically the Type-C ports. Both the rear USB-C and the front-panel USB-C only ever bring up the USB 2.0 pins; the SuperSpeed lanes never get connected. That’s why Magician says “Slot Max: USB 2.0” while the drive and the PC both report 3.2, and why the same drive and cable are fast on a Mac.
The test that proved it: plug the T7 into a rear USB-A port using any USB-C to USB-A cable that is actually USB 3 (blue insert, 9 contacts). Mine immediately showed Interface: USB 3.2, Slot Max: USB 3.2, and transfer speed went from ~42 MB/s to hundreds. Nothing else changed. Every software step in this thread (power settings, selective suspend, uninstalling the xHCI controller and hubs) was irrelevant.
Why the Type-C ports do this I still don’t know. A USB-C port needs a small mux chip on the board to route the fast lanes based on cable orientation; the USB 2.0 pins don’t need it. If that chip isn’t doing its job you get exactly this symptom. Someone else with the same board and CPU reported the identical thing on the LTT forums with no fix found. I’m going to try a full power drain (PSU off, unplug, hold power 30s) to reset that controller and will post if it changes anything.
Lord Dover: your Magician says PC Max USB 2.0, which is a different line than mine, so it may be a different cause. But the USB-A test takes two minutes and will tell you whether it’s your Type-C port or something wider. James Murphy: yours matches mine exactly; try the USB-A port.
Short version: if Magician says “Slot Max: USB 2.0,” the port is the problem, not the drive. Try a different port type before touching any drivers.
