If the card works in another computer updating the drivers is not going to help because if I understand you correctly the computer is not posting with the card in. In other words there is nothing on the monitor at all during start up before it gets to windows.
The agp slot on the motherboard can't be bad because the other card works, I don't know what could cause this but I have a older all in wonder card that will not work at all in a MSI motherboard, same thing the computer refuses to post with it installed yet I know the card is good.
If you find a answer let me know
The agp slot on the motherboard can't be bad because the other card works, I don't know what could cause this but I have a older all in wonder card that will not work at all in a MSI motherboard, same thing the computer refuses to post with it installed yet I know the card is good.
If you find a answer let me know