Core i5 Ivy Bridge i5-3570K 100 3.40 1M 6M E1 77 7751vA3.zip release date of this bios is 2012-03-27, so if that mobo was manufactured prior to that, it may not have full cpu support.
If the system posts w/ igd, check the bios version in uefi/bio and if nessesary, download the newest version: http://www.msi.com/product/mb/Z77A-GD65.html#/?div=BIOS
Use the forums flash tool to prepare the usb stick for flashing: >>Use the MSI HQ Forum USB flasher<<
An alternate way to identify the bios is to look for a green sticker on the bios chip or check the date code in the S/N.
When you say check for extra standoff, do you mean an extra standoff that might be touching the back of the board and possibly causing a short?
Yes, this is a very common issue.
If the pins were bent, they can usually be "fixed" you just need a very small object in order straighten them.
If it boots into Windows, you have no problem.
This only happens with the IGD correct? You cannot get the discrete cards to be detected is the issue right?