2 of 2 people found this helpful
There are a lot of post on the internet about this issue and how to go about fixing it.
Here is one... How to Fix Code 43 Errors in Windows
Try the card in a different system, if you get the same problem the card is the issue.
Troubleshooting Common AMD Graphics Driver Installation Problems
Also, have you tried a different power supply? 500 W is the absolute minimum for that card.
Have you tried different video cables?
Have you disconnected all non-essential devices from the system?
And absolutely, as arcticwind suggested, try the cards in a different system- preferably one with a higher-wattage power supply.
1 of 1 people found this helpful
You did try first time setup/driver install with only one monitor ?
Installing driver to os drive is recommended.