How do I make 2 kits of 8GB 1866 Mhz Kingston DDR3 RAM work with a Gigabyte GA-990-FXA v.4?

Cecil_C

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Aug 29, 2014
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I have the latest BIOS drivers, latest drivers for my CPU, GPU, etc, and I am operating on Windows 7 64 bits, Ultimate.

My CPU is an AMD FX-6300, which I was previously overclocking to about 4.1-4.4Ghz.

Old, stable settings:
2 sticks of Kingston HyperX Fury 1866 Mhz RAM, 4 GB each, 10-11-10-30 @ 1.5v, matched
2 sticks of Patriot Sector 5 2000 Mhz RAM, 2 GB each, 8-8 -8-26 @ 1.65v, matched
For a total of 12 GB of RAM.

CPU-Z showed me a DRAM frequency of 530-something. I knew something was causing my system to drastically lower all my RAM.

New, extremely unstable black screen-causing settings:
4 sticks of Kingston HyperX Fury 1866 Mhz RAM, 4 GB each, 10-11-10-30 @ 1.5v, matched
For a total of 16 GB of RAM.

All hell broke loose the second I "upgraded" my system. Black screens of death, NON-stop sleepless night playing around with the BIOS settings, messing around with voltage, TAS and tRCD settings, all to no avail.

Under "Memory", my motherboard's manual explains:

4 x 1.5V DDR3 DIMM sockets supporting up to 32 GB of system memory??
Dual channel memory architecture??
Support for DDR3 2000(O.C.)/1866/1600/1333/1066 MHz memory modules??
*To support a DDR3 1866 MHz (and above) memory, you must install an AMD AM3+ CPU first."

And on the memory support page on Gigabyte's official website, it states:
Note: Only one DIMM per channel is supported for DDR3-1866MHz and higher speed as using an AM3+ CPU.

So, ever since I “upgraded” my RAM, I can no longer boot Windows 7 – I tried to restore the system, I tried all the options given to me by Windows, I tried removing my motherboard's battery, and I feel as though I'm running out of options.

But get this – I tried going back to my old RAM set, and the result is the same. I tried every stick combination I have (I have more RAM from other manufacturers...), I even tried going with a single stick – all failed.

System Recovery failed every time, and it's been giving me this error message:

Problem Event Name: StartupRepairOffline
Signature 01: 6.1.7600.16385
Signature 02: 6.1.7600/16385
Signature 03: unknown
Signature 04: 21199316
Signature 05: AutoFailover
Signature 06: 6
Signature 07: NoRootCause
OS Version 6.1.7600.2.0.0.256.1
Locale ID: 1033

Update: I tried booting from my Windows OS disk - it gave me a BSOD, with an error message, ""The BIOS in this system is not fully ACPI compliant"... so, I can't even format even if I wanted to, it seems. I would prefer not to have to format my C drive, as other threads on some sites have mentioned.

What did I do so terribly wrong?