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DZ77-GAL70K Channel A Memory Slots Not Working



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

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ChrisM, the G.SKILL Ripjaws memory is a not supported memory since the speed is 2400MHz and the voltage is 1.65V. Even though the motherboard can handle that speed, is the processor who managed the memory and it supports memory speed up to 1600 MHz. The voltage needs to be 1.5.


I was not able to find information on the other memory type you are using.


I recommend you getting a fully compatible memory in order to test the system. You will be able to find all the supported memory configurations and tested memory on the following link.


Once you get it you can follow these steps


• Check which is the current BIOS version installed on your motherboard. The latest BIOS version is 0066 however there are some users reporting issues with it. So if your system needs a BIOS update please install the previous one (V0064)."Intel+Desktop+Board+DZ77GA-70K"&DownloadType=BIOS


• You can also clear the CMOS removing the battery for about an hour datetime datetime


• Test the system out of the chassis, minimal configuration please. (Motherboard, processor, power supply and memory)


  • It will be very important to know if you are able to access the BIOS using only one memory stick on DIMM # 1, just to find out if the slot is working.


Please try to boot to your operating system and download the Processor Diagnostics Tool and run it on your system using at least one memory stick. At the end it will let you know if your processor "passed" or "fail" the test. This utility is Windows based. Download Center


Remember that Dual channel is enable by default, so this kind of behavior could be related to a defective motherboard or a defective processor.


If you have another processor to test on this board, please give it a try, if not I recommend you to replace the motherboard first.


If the board was purchased less than 30 days ago please contact the place of purchase.

If it was purchased more than 30 days, you can get in touch with our local Warranty Department so they can help you to replace the unit:


Just in case, remember that low profile memory is not supported by this motherboard. Desktop Boards — System memory information