Actually, the above
Error code 43 can be reported anytime when Windows does not recognize a device – whether it's a USB port, Hard drive, video card/GPU, or any other piece of hardware connected to the computer. Most of the time, error code 43 means that a device driver is either
missing, corrupt, and/or outdated (so Windows has problems communicating properly with the hardware), or the hardware is faulty and needs to be replaced.
This error code points out that the Hardware might be
defective, which is the GPU. But before we jump to any conclusion, check the card on some other PC as well. Because if the GPU is brand new, then chances of it being DOA are kind of slim, but nothing can be guessed as of now.
Can you properly boot your current system/OS, by using the 'Integrated Graphics processor' of your current Motherboard ? Do you still get the same problem ? And, what about safe mode ? Can you also TEST the Video card on some other PC ? Also, are you on a clean Windows OS install ? If not, then try doing a clean format of your SSD/HDD, if need be. Clear and reset all the CMOS/BIOS settings to default.
What's the exact Model number of your 630 Watts PSU ?
Error code 43 is a generic message that typically indicates a problem with the hardware or software in Windows operating system. This error is often reported in Windows Device Manager. If you encounter this error with your graphics card, here are some troubleshooting ideas that may help fix it.
1) Update your graphics card driver. Do a CLEAN re-install by using the DDU tool.
https://www.wagnardsoft.com/
2) Make sure your system is updated with the latest BIOS and Windows updates.
3) Check to make sure your system power supply meets the minimum recommended power requirement for your card, and it is of high quality as well.
4) If your card needs additional power, make sure the
PCIe supplemental power connector is plugged into the card. This is also important.
5) Replace the graphics card if it indeed turns out to be defective.
Code 43 can mostly happens either if drivers fail or the hardware fails. Other option is that your GPU or motherboard slot failed. If your motherboard has more then one PCIe x16 slot, you can move GPU to another slot to rule out motherboard failure. Or you should test GPU in another machine to confirm that problem lies in the card.