All pc fans run at full speed when the gpu is plugged in

Understanding and Resolving Fan and GPU Detection Issues on Your HP EliteDesk 800 G1

If you’re experiencing a situation where your PC’s case fans run at full speed upon installing your GPU, and the graphics card is not being detected, it can be concerning—especially when budget constraints limit hardware options. This guide aims to help you understand potential causes and steps to troubleshoot and resolve these issues effectively.

System Overview
Your setup includes an HP EliteDesk 800 G1, equipped with an Intel Core i5-4570 processor, 16GB RAM, a 500GB SSD, a 500GB HDD, and a GTX 1050 Ti 4GB graphics card. The GPU has been functioning properly when connected via the motherboard’s PCIe slot, but recent issues have arisen where, upon installation, system fans spin at full speed and the GPU isn’t recognized by the system.

Key Symptoms and Observations
– Fans (GPU and CPU) run at maximum speed when the GPU is installed.
– The GPU is not detected in the system hardware or device manager.
– The system operates normally without the GPU installed, using integrated graphics.
– Fans sometimes run at full speed even without the GPU.
– Previous troubleshooting involved resetting BIOS, replacing the CMOS battery, testing with single RAM modules, and restoring BIOS defaults.

Troubleshooting and Possible Causes

1. Power Supply and Connections
   Ensure that your power supply unit (PSU) can adequately support your GPU. The GTX 1050 Ti is a relatively low-power card, but improper or loose power connections can cause hardware faults. Verify that any PCIe power connectors are properly plugged in (if your card requires them). If your GPU relies solely on the motherboard’s PCIe slot without additional power connectors, minimal power issues might be suspected.

2. BIOS Settings and Firmware
   Resetting BIOS to defaults was a good step. Check for any BIOS updates from HP that might improve hardware compatibility and detection. Sometimes, outdated BIOS can cause hardware detection issues.

3. Check Hardware Seating and Connections
   Remove and reseat the GPU to ensure it’s properly installed in the PCIe slot. Examine the slot for dust or damage. Test the GPU in another compatible system if possible, to confirm it hasn’t developed hardware faults.

4. Inspect the GPU and Motherboard for Damage
   Look for visible signs of damage on the GPU or the motherboard’s PCIe slot. Overheating or physical damage can lead to detection problems and abnormal fan behavior.

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