Wiki

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
====== Ubuntu - GPU - AMD GPU - Monitor - Manually - Check the Current Link Speed for the GPU ======

===== Determine what the bus is for the GPU =====

<code bash>
sudo lshw -c video
</code>

returns:

<code bash>
  *-display                 
       description: VGA compatible controller
       product: Navi 31 [Radeon RX 7900 XT/7900 XTX]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:0c:00.0
       logical name: /dev/fb0
       version: c8
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom fb
       configuration: depth=32 driver=amdgpu latency=0 mode=3440x1440 resolution=3440,1440 visual=truecolor xres=3440 yres=1440
       resources: iomemory:f00-eff iomemory:f80-f7f irq:129 memory:f000000000-f7ffffffff memory:f800000000-f80fffffff ioport:e000(size=256) memory:fcb00000-fcbfffff memory:fcc00000-fcc1ffff
</code>

<WRAP info>
**NOTE:** This shows that the bus is **pci@0000:0c:00.0**.

  * An alternative command is: <code bash>
lspci | grep VGA</code>

  * returns: <code bash>
0c:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 31 [Radeon RX 7900 XT/7900 XTX] (rev c8)
</code>

  * which shows **0c:00.0**.

</WRAP>

----

===== Determine the current link speed =====

Use the bus information from above:

<code bash>
cat /sys/bus/pci/devices/0000\:0c\:00.0/current_link_speed 
</code>

returns:

<code bash>
16.0 GT/s PCIe
</code>