I have recently completed a new computer build this week with a DZ77-GAL70K board with an I5-3570K CPU and so far have been completely unsuccessful getting the Channel A memory slots (DIMM 1 and 3) to work. I have tried 2 different kinds of memory so far, RAMAXEL 8GB (2x4) PC3L-12800 and G.SKILL Ripjaws X Series 8GB (2 x 4GB) - PC3 19200 and I get 3 beeps every time and a reboot.
In channel B, both types of memory have worked perfectly without issue, other than being unsuccessful at overclocking the GSKILL 2400 memory to 2400 MHz, can only get them to run at 1600 MHz, any settings higher the system gets stuck in a reboot cycle. I know neither type of memory is listed under the compatibility chart for the board but that does not make any sense why they would work perfectly in Channel B (both brands) and not work at all in Channel A. Both memory are also brand new.
Is this going to be fixed in any upcoming BIOS versions as I have seen many other people have posted the same issue in the support community