The computer not recognizing the newly installed card is a frequent issue. This may be caused by a number of things, such as out-of-date drivers or incorrect card placement in the slslots winner allot. Make sure the card is firmly in its slot and that any required power connectors are connected correctly before beginning to troubleshoot this issue. Reinstalling current drivers or looking for driver updates may fix the issue if everything seems to be in order but it still doesn't go away. Performance issues following installation are another common problem.