GPU NOT RECOGNISED
When your graphics card isn't recognised by your PC, you'll typically notice poor display performance, inability to run games or GPU-intensive applications, or your display running on the CPU's integrated graphics instead. This guide covers the most common reasons a GPU goes undetected and how to fix them.
Common Causes
The GPU is not properly seated in the PCIe slot — even a slight misalignment can prevent detection.
Missing or disconnected PCIe power cables from the power supply to the graphics card.
Outdated, corrupted, or incompatible GPU drivers causing the operating system to fail to recognise the card.
BIOS/UEFI settings configured to use integrated graphics instead of the dedicated GPU.
Insufficient power supply wattage to support the graphics card's power requirements.
Physical damage to the GPU, PCIe slot, or the gold contact pins on the card.
Step-by-Step Solutions
Reseat the Graphics Card
Power off your PC completely, unplug it, and open the case. Press the release latch on the PCIe slot and carefully remove the GPU. Inspect the gold contacts on the bottom of the card for dust, debris, or damage. Clean them gently with a lint-free cloth. Also blow out any dust from the PCIe slot using compressed air. Reinsert the GPU firmly into the slot — you should hear a click when the latch engages. Make sure the card is level and the backplate screws are secured to the case.
Check Power Connections
Most dedicated graphics cards require additional power beyond what the PCIe slot provides. Check that all required PCIe power cables (6-pin, 8-pin, or 12-pin depending on your card) are firmly connected from your power supply to the GPU. Use separate power cables rather than daisy-chaining from a single cable for high-end cards. If your power supply doesn't have enough PCIe power connectors, it may not be powerful enough for your GPU. Check your GPU manufacturer's recommended PSU wattage.
Update or Reinstall GPU Drivers
If the GPU is physically detected but not working properly, driver issues are the most likely cause. Download the latest drivers directly from NVIDIA (GeForce Experience or nvidia.com) or AMD (adrenalin software or amd.com). Before installing, use Display Driver Uninstaller (DDU) in Safe Mode to completely remove old drivers. This prevents conflicts between old and new driver versions. After a clean install, restart your PC and check Device Manager to confirm the GPU is recognised without any warning icons.
Check BIOS/UEFI Settings
Restart your PC and enter the BIOS/UEFI setup (usually by pressing Delete, F2, or F12 during boot). Navigate to the display or graphics settings section. Look for options like 'Primary Display Adapter', 'Initial Display Output', or 'PCIe Configuration'. Set the primary display to 'PCIe' or 'PEG' instead of 'Integrated' or 'IGD'. Also check that the PCIe slot is set to 'Gen 3' or 'Auto' rather than being disabled. Save changes and exit — your PC will restart with the new settings.
Test in Another System or Slot
If your motherboard has multiple PCIe x16 slots, try moving the GPU to a different slot. This helps determine whether the issue is with the card or the specific slot. If you have access to another PC, test the GPU there to confirm whether the card itself is functional. Similarly, if you have another GPU available, test it in your system to rule out motherboard or PSU issues. This cross-testing approach is the most definitive way to isolate the faulty component.
When to Call a Pro
If the steps above don't resolve your issue, it's time to call in the experts. Contact us if:
The GPU shows visible physical damage such as burnt components, bent pins, or cracked PCB.
You've tried multiple slots and systems but the GPU remains undetected — it may need professional repair or replacement.
Your PC shuts down or crashes when the GPU is installed, indicating possible power or compatibility issues.
You need help selecting and installing a compatible replacement GPU for your system.