eGPU only getting PCIe 1.1 (2.5 GT/s)
Hello everyone, it's me again. When i try to use an AMD eGPU (7700xt), i only get PCIe 1.1 (2.5 GT/s) speeds instead of PCIe 3.0 speeds (8 GT/s) according to sudo lspci -vv.
Also, the AMD Link speed fix from all-ways-egpu github doesnt work: Create a file named: /etc/modprobe.d/amd-pcie-fix.conf with the following content: options amdgpu pcie_gen_cap=0x40000
Hardware:
Lenovo Legion Go
ADT-Link UT3G Adapter
550W PSU
RX 7700XT
Is there any help or hope for me? I really, really want to use Bazzite with eGPU!
Thank you very much in advance!
8 Replies
How to Modify Initramfs and Dracut - Bazzite Documentation
Bazzite is a custom image built upon Fedora Atomic Desktops that brings the best of Linux gaming to all of your devices.
That does NOT work for me. Cant boot after doing the procedure.
and you wrote it as
"amdgpu.pcie_gen_cap=0x40000" for the karg?Yes sir, altough i am not really good with linux. Is there a possibility you can walk me through the process or will it be Updated soon so i can retry?
i literally wrote the guide i linked, it will be identical
if you need to remove the karg just boot up the pc press ESC to get into grub and press E then remove
amdgpu.pcie_gen_cap=0x40000 from the linux line
then press CTRL+X to boot, then when in the system run rpm-ostree kargs --delete-if-present="amdgpu.pcie_gen_cap=0x40000" to remove the kernel argumentOkay i will try it again. Most likely i messed up because i am not used to Linux. Do i have to put 0x80000 or 0x40000?
no idea as i never used this command, i dont use egpus
Hi did you ever fix this? Running into this on my GPD Win 4 6800u, over eGPU thunderbolt, on GPD G1(7600m XT)
I’m going to try Hikari’s written guide and see if I can figure it out. Checked ‘sudo lspci -vv’ and it’s indeed saying 2.5 GT.
I should note that I recently switch to bazzite-deck-stable from bazzite-gnome desktop image; this was not a problem with usb4 eGPU on the win 4 but it is on the deck image for some reason.
reporting back that this worked like a charm after following the guide. Allowed my eGPU to be detected in LACT too, even though mission center saw it, lact didn't. LACT also reports 8 GT/s now. Thank you.