[SOLVED] Running Memory in Dual Channel on an MSI 970A-G43

[undefined512]

I've been unable to get 2x4GB sticks of RAM to run in dual channel mode. Right now the two sticks occupy blue slots 2 and 4 (with slot 1 being closest to the CPU), as the manual recommends. I've also tried swapping the two sticks (still in 2 and 4) and placing them in slots 1 and 3 (both black). Either configuration results in the bios recognizing the full 8GB of RAM, but when I boot to Windows, only 4GB is recognized.
CPU-Z shows that it's running in single channel mode, but it sees the full 8GB.

What I've tried:

• 
  ■Installing the RAM in slots 1 and 2. This works correctly and gives me the full 8GB, but only in single channel.
  ■Searching through the bios for a manual setting to enable dual channel, I can't seem to find one, if it exists.
  ■Enabling/disabling XMP in the bios
  ■Clearing CMOS
  ■Updating the motherboard bios to the latest version, A.60

While searching through the forums, I saw some posts that said a one or more CPU pins could be bent or broken. Does this seem like something I should check?


System specs:
Motherboard: MSI 970A-G43

RAM: Corsair Vengeance Pro Series 8GB (2 x 4GB) DDR3 DRAM 2400MHz C11 (Purchased as one kit)
Model number CMY8GX3M2A2400C11R

CPU: AMD FX-4350

Graphics card: MSI 7790

OS: Windows 7 Professional, 64 bit.

Thanks for any help!

 

[undefined512]

Update & bump:
I tried the quoted instructions, but Windows still doesn't see all 8GB. (And CPU-Z still shows single channel operation.) I still have my memory installed in slots 2 and 4.

Try the following, the overall difference will be nearly 0 between 1600 CAS 9 vs 1333 CAS 8.

Same as before:
DRAM Frequency - > DDR3-1333MHz
DRAM Voltage -> 1.55v
CPU NB Voltage -> 1.30v

Slight OC - call it a tweak:
Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 8
tRCD -> 8
tRP -> 8
tRAS -> 24

Thread: http://www.tomshardware.com/forum/295431-30-total-usable

 

[undefined512]

Reseating the CPU seems to have fixed it.