I checked and confirm the Intel(R) Desktop Board DH67BL supports DDR3 1333 MHz and DDR3 1066 MHz SDRAM DIMMs, only:
As for the Intel(R) Core(TM) i7 Processor, I confirm it only supports DDR3-1066/1333, too:
I'd recommend trying with compatible memory.
As for the random situation with the USB keyboard, I'd recommend the following, just to be 100% sure:
Restart the system into BIOS by pressing <F2> during the boot process. Once in the BIOS setup utility, press <F9> to restore BIOS default settings. Reset any customized BIOS settings. Clear all DMI event logs by setting the option to "Enable", which is located in the Advanced/Event Log Configuration section of the BIOS Setup utility. Press <F10> to save the new settings and reboot the system.
Recommendation: Troubleshoot each symptom at a time. First, see to it that your system has a compatible memory frequency.