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Motherboard fails POST using more than 16G of memory

  • Motherboards
  • AMD
  • Gigabyte
  • Memory
  • USB3
Last response: in Motherboards
February 27, 2014 8:28:22 AM

I have a Gigabyte 78MLT-USB3 motherboard running 16Gs of RAM. Everything works fine, but when I try to install another 16G or just 8G, I get a POST error stating it failed due to overclocking. When I first asked tech support, they said it was because I was trying to add memory with a different speed. So, I went back and bought 16G of the exact make, model, and speed. However, I still get the POST failure and overclocking error.

Also, the system will still boot, if I tell it to continue to boot. It doesn't seem unstable, but I also haven't tried to actually use more than 16Gs either. I've uninstalled it until I can figure this out. Any help would be appreciated

Motherboard: Gigabyte 78MLT-USB3
CPU: AMD FX-4100
Memory: G.Skill F3-1066CL9D-16GBXL

More about : motherboard fails post 16g memory

a c 1785 V Motherboard
a c 138 } Memory
a c 134 À AMD
February 27, 2014 9:10:52 AM

Do you try to run the RAM in 1066MHz with more than 16GB? If you can run it, then that means the MB has the limition for the OCing because the 1333MHz is the ocing speed for that MB.
Also do you try to set the voltge in the BIOS for the tweak? And I read someone even runs the RAM over 1600MHz speed on the same model MB.
February 27, 2014 2:02:06 PM

Yeah, I can't get it to work at any speed with more that 16G, over or underclocking. I can manually set the voltage and memory timing and the system will accept them. However, every memory clock setting is rejected and defaults are loaded, which is the Auto setting, which still fails POST. I have seen the other post about other overclocking, but I haven't found anyone running more than 16G.

Related resources
a c 843 V Motherboard
a b À AMD
a b } Memory
February 27, 2014 3:31:23 PM

G.Skill, the memory manufacturer, FAQs:

I want to install more memory, in addition to my existing memory kit. What are my options?

We do not recommend mixing memory kits, regardless of brand or model.

By mixing memory kits together, there may be compatibility issues such as unable to boot or unable to operate at rated specifications.

Each of our memory kit are thoroughly tested to ensure compatibility within each memory kit. And because we have not tested our memory kit with your existing memory kit, we cannot guarantee compatibility when multiple kits are used.

February 27, 2014 6:11:02 PM

Thats what tech support said, which is why I went back and bought the same kit that was originally installed. Currently, I'm trying to use (2) - F3-1066CL9D-16GBXL kits, or (4) - F3-1066CL9D-8GBXL. I can also mismatch the old an new kit, as long as its 16G.

Best solution

a c 843 V Motherboard
a b À AMD
a b } Memory
February 27, 2014 7:24:35 PM

This is a 32GB kit:
G.SKILL Ares Series 32GB (4 x 8GB)

Using (2) - F3-1066CL9D-16GBXL kits is known as mixing multiple kits. Compatibility is not guaranteed when multiple kits are used.