I just finished building this system with an z87-a mobo... But although I can get into the bios, after a couple of seconds I lose access to the keyboard and mouse. The bios seems to run since the clock advances but I have no way to edit anything. Any suggestions? Btw I have tried already different keyboards and mice...with same result
Looking at the BIOS screen I noticed that the memory speed although correct brand and size it was reported as 1600 MHz which was not right (1866). So I figured trying the Memory OK button. That seems to have done the trick. Bios is easily accessible now, also I manually edited the Memory speed and I should be fine.