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Unplug then SATA device containing Windows 8.
Do another bios recovery using the USB flash. Now see if you can boot into the bios (F2). If you can, make sure that secure boot is not set and don't select UEFI mode. If you still can't boot into the bios then pull the video card. You should be able to use on board video. EVGA claims to have UEFI GOP enabled video cards but you need to confirm that claim with EVGA. Even if the EVGA 640 supports UEFI GOP, the Intel motherboard bios may be the issue.
Thanks Dave. Your response was both helpful and insightful. Even though I saw your reply after fixing the issue it confirmed my actions as well as now makes me want to go and further review my bios settings. What actually ended up being the problem was my Microsoft ergo keyboard and for some reason the boot order was changed to boot off the network connections. Regarding the keyboard I pulled off mine and put my wife's in its place and the function keys were working and I could enter the bios. While in I changed the boot order and disabled booting off the network connections. Then I shut down and put my keyboard on and powered up but could not then get into the bios. Put my wife's on and I could. I finally realized I must have hit the switch that turns the function keys on and off to off. Once I turned it back on I was back in business. The latter issue was a fat finger error on my part and the other I am still not sure what changed the bios, maybe when I updated it? Take care and much thanks for sharing your insights and experience.
Thanks for posting back. I have the same motherboard and network boot is checked by default.
There might be a bug in the bios with keyboard and mice compatibility. The MS wireless mouse that I used "crawled" all over the screen when in the bios so I switched to a Logitech wireless mouse.
I still feel that there are issues with the bios UEFI mode and EVGA cards. I have two different EVGA cards and neither would boot with Windows 8 in UEFI mode.