How to Fix GPU Not Detected in Windows 11

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My Technician
Windows 11HardwareDriversTroubleshooting

The Problem

Games will not use the discrete GPU, Task Manager shows only Microsoft Basic Display Adapter, or Device Manager has no NVIDIA/AMD/Intel entry. The GPU can be disabled in software, hidden by a bad driver, or loose on the board.

PC does not display anything at all? Start with PC won't turn on and black screen on boot before driver work.

Symptoms

  • Display adapters lists only Basic Display or an unknown device with a yellow warning.
  • Laptop always uses integrated graphics despite plugging in AC power.
  • GPU worked until a driver update or Windows upgrade.

The Fix: Step-by-Step

Step 1: Confirm Hardware and Power

  1. Desktops: reseat the GPU in the PCIe slot and connect PCIe power cables from the PSU (6/8-pin).
  2. Plug the monitor into the GPU outputs, not the motherboard (unless CPU graphics only).
  3. Laptops: plug in AC power—many disable the dGPU on battery saver.

Step 2: Show Hidden Devices in Device Manager

  1. Device Manager → View → Show hidden devices.
  2. Expand Display adapters → if the GPU is gray, right-click → Enable device.
  3. Yellow warning? Note the error code—often Code 43 (driver or hardware fault).

Step 3: Remove Basic Driver and Reinstall GPU Driver

  1. Right-click the discrete GPU (or Microsoft Basic Display Adapter if it replaced your card) → Uninstall device → check Attempt to remove driver if shown.
  2. Reboot—Windows may reinstall; then install the latest driver from NVIDIA, AMD, or Intel (laptop OEM site for hybrid graphics).
  3. Follow update drivers safely—avoid third-party driver packs.

Step 4: BIOS and PCIe Settings

  1. Enter BIOS/UEFI → ensure Primary display is PCIe / PEG for desktops, not forced iGPU only.
  2. Enable Above 4G decoding / Resizable BAR only if your board and GPU support them—wrong combos can hide GPUs on some boards.
  3. Reset BIOS to defaults if the GPU vanished after an overclock attempt.

Step 5: Check GPU in Task Manager and Settings

  1. Task Manager → Performance → GPU tab should appear after a good driver install.
  2. Settings → System → Display → Graphics → add apps and set High performance for the discrete GPU on laptops.
  3. Verify specs with check PC specs on Windows 11.

Step 6: Clean Driver Install or Hardware Test

  1. If Code 43 persists, perform a clean install of GPU drivers.
  2. Test the GPU in another PC or try onboard graphics only—dead GPUs do not appear in any OS.
  3. Overheating shutdowns can look like “GPU missing” after crash—see CPU/GPU overheating and freezing randomly.