Ok - so deleted the Nvidia stuff via control panel and Driver fusion. reboot and windows did find the generic VGA driver. SO far so good. shut down and installed new GPU- very tight - had to slightly bend hard drive cage to fit it. Reconnect PCI e power and hit the power. The fans and LED's started to come on, but dimmed immediately and flickered/pulsed and then nothing. Hmm..... What the HELL!! - OK so was installed a new PSU anyhow - , so took out the GPU, and the PSU, installed the new PSU , and noticed the bottom corner connections on the MOBO were off= LED, reset,etc. -So they must have come off when moving the cords around for GPU install or PSU extraction. SO now need to find out what goes where= Asrtock Z68 gen 3 mobo - will have to use some young eyes as the writing on the connection is tiny. . Ran out of time - will update when I get home from the office - 8 pm.