Michael,
Thanks for your reply, you were right. Newer drivers are not always improved! Upon reinstalling the OEM drivers everything went back to normal, and the FPS is just as good... So like they say, 'if it ain't broke, don't fix it'...
If the fish were great, they really come alive now, what an improvement from the old Viper V330, which was limited to 800x600!
Congrats to all for a beautiful product and thanks for your help, much appreciated!