Computer Does Not Boot With PCIe Card in x16 Slot

Updated Jul 12, 2021

Reported In


  • PCIe-6353
  • PCIe-1433

Issue Details

My computer will not boot when I put a PCIe card into an x16 slot.
My computer will not POST (Power on self test) when I put a PCIe card into an x16 slot.


First, here are a few troubleshooting steps to determine if the problem is with the PCIe card or the PC. 
  • Re-seat the PCIe card in the PCIe slot
  • Try the PCIe card in another PCIe slot in the same computer
  • Try the card in another computer
  • Try a known working PCIe card in the PCIe slot that is having the problems

If the problem lies with the PC, there are a couple of possible steps that could help fix this issue.
  • Update the firmware/BIOS for the computer motherboard. (This updated BIOS typically has to come from the motherboards manufacturer)
  • Change BIOS settings for PCIe card from AUTO to GEN1 (Options typically are  AUTO/GEN1/GEN2/GEN3)

Additional Information

Note: Intel Skylake chipsets (HD110/Q170) have been problematic. They did not work with 1433 and 6323 PCIe cards that were known to work. 
Note: The PCIe-1433 has been seen to prohibit a Dell OptiPlex 3040 from booting as well.
Note: For HP computers you can disable the PCIe Security setting on the BIOS following this procedure: External Link: HP Desktop PCs - Computer Does not Start After Installing a Video Card (Windows 10, 8)