My GA-F2A88XM-D3H only using 4GBs of F3-12800CL9D-8GBXL ram in Single Channel!

[MerrickPlainview]

Back in October, I purchased all new components including the G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBXL. After a few months, I noticed that my RAM was being recognized by Windows 7 (64-bit) and the Gigabyte BIOS as 4GB. In my bios it shows both sticks, see picture below:


I tried several methods to fixing the problem:

• Reseating the ram
• Moving the Ram from DDR3_3 & DDR3_4 to DDR3_1 & DDR3_2 (as the mobo manual suggests)
• Clearing CMOS
• Checking status in CPU-Z (Which recognizes both sticks but indicates Single Channel)

Here's some PC info:

• MOBO: Gigabyte GA-F2A88X-D3H (3.0)
• BIOS Ver: F6
• GPU: Nvidia Gefore GTX 560 ti
• CPU: AMD A10 7850k
• Operating System:   Win 8 64-bit
• Power Supply: 500w

Any ideas? Thanks in advance.

[regit]

Back in October, I purchased all new components including the G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBXL. After a few months, I noticed that my RAM was being recognized by Windows 7 (64-bit) and the Gigabyte BIOS as 4GB. In my bios it shows both sticks, see picture below:


I tried several methods to fixing the problem:

• Reseating the ram
• Moving the Ram from DDR3_3 & DDR3_4 to DDR3_1 & DDR3_2 (as the mobo manual suggests)
• Clearing CMOS
• Checking status in CPU-Z (Which recognizes both sticks but indicates Single Channel)

Here's some PC info:

• MOBO: Gigabyte GA-F2A88X-D3H (3.0)
• BIOS Ver: F6
• GPU: Nvidia Gefore GTX 560 ti
• CPU: AMD A10 7850k
• Operating System:   Win 8 64-bit
• Power Supply: 500w

Any ideas? Thanks in advance.

First :Update bios to latest F10a

[MerrickPlainview]

You have 3 ram sticks installed? (according to bios screen)
there is 1 in slot4 and 2 in slot2?

looks fishy, no?

I only see 2. 

[AgentFXA]

Yep, I misread the screen!

[MerrickPlainview]

Alright, I tried each stick individually on each slot. Ram sticks are healthy and work by themselves. I checked bios to see what ddr3 slot correlated with what DIMM #.

• DDR3_1 = DIMM 4 (Channel B)
• DDR3_2 = DIMM 2 (Channel A)
• DDR3_3 = DIMM 3 (Channel B)
• DDR3_4 = DIMM 1 (Channel A)
  

So I took the advice from another forum on Tom's Hardware and plugged them into the same channel, into DDR3_4 & DDR3_2 and viola, 8GB!

[ElectroStingz]

Hello,

So you are saying Channel A works, when you tried just 1 stick did you test just channel B?
Place only 1 stick in either one.
DDR3_1 = DIMM 4 (Channel B)
DDR3_3 = DIMM 3 (Channel B)

Then try both in above slots.
Will not work?

[MerrickPlainview]

Hello,

So you are saying Channel A works, when you tried just 1 stick did you test just channel B?
Place only 1 stick in either one.
DDR3_1 = DIMM 4 (Channel B)
DDR3_3 = DIMM 3 (Channel B)

Then try both in above slots.
Will not work?

Yes, Channel A works with both sticks. Windows and BIOS now displays 8GBs. So the problem is fixed. I tried Channel B and it does work with one stick in DDR3_3.