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Graphics drivers and games troubleshooting guides

Find fixes for graphics driver installation errors and game launcher problems. Check supported hardware, error codes and verification steps.

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▤Desktop PC graphics card PCIe slotTroubleshooting guide

Graphics card runs at PCIe x8 or a lower generation: check GPU-Z Bus Interface, M.2 lane sharing and BIOS link speed

The GPU-Z "Bus Interface" field reads something like "PCIe x16 5.0 @ x8 5.0" or "PCIe x16 4.0 @ x16 2.0", with the value after @ lower than the value before it

Windows 11 / Windows 10 custom-built or desktop PCs where the GPU-Z "Bus Interface" field (including the GPU-Z page in ASUS GPU Tweak III) shows the graphics card running with fewer lanes or an older generation than expected, such as x8 or PCIe 2.0 / 3.0
Checked 2026.09.13Read guide ↗