"E0"
When you get this error message the Mainboard cant detect the memory SPD, the memory itselft, or there was some problem while reading from the SPD. Shut down the Mainboard and make sure the memory is seated properly. Load the optimized defaults, if this doesnt help then try one stick of memory in slot1 or slot2, if possible update the BIOS, try another SPD on your memory, try another set of memory or try this set of memory in another system.
other solutions: http://www.tomshardware.com/answers/id-1801802/msi-z87-gd65-error-code.html
http://www.overclock.net/t/1402283/i-need-some-help-with-msi-z87-gd65-with-error-code-debug-led-codes