Memory missing @a88x-itx

[Kalamake]

Win7 64 bit ultimate A10 7850K radeon, 12 compute cores 4c+8g 3,7GHz
6GB ram 3,9GB usable(4+2)
BIOS 2.4
MB a88x-itx Asrock, usign APU, but same with card.
Tried with identical memory, same issue 4+4.
If memory is less than 4GB if uses only half.
On msconfig no ticked on maximum memory
Doesnt like to be booted with single memory.

Googled so much, no help. Is motherboard faulty?

 

[Darkbreeze]

What are the specifications of the RAM you are trying to use? DDR version, speed, amount per module, ECC or non-ECC, etc.

 

[Kalamake]

Float Memory Bandwidth
Assignment : 5.62GB/s
Scaling : 5.53GB/s
Addition : 5.48GB/s
Triad : 5.54GB/s
Data Item Size : 16bytes
Buffering Used : Yes
Offset Displacement : Yes
Bandwidth Efficiency : 20.43%

Benchmark Status
Result ID : AMD PCI standard host CPU bridge; 2x 2GB Samsung M378B5773DH0-CK0 DDR3 SO-DIMM (1.6GHz 128-bit) PC3-12800 (11-11-11-28 5-39-12-6)
Computer : ASRock FM2A88X-ITX+
Platform Compliance : x64
Total Memory : 3.44GB
Memory Used by Test : 1.15GB

Logical/Chipset Memory Banks
Bank 12 : 4GB DDR3 SO-DIMM 11-11-11-28 5-39-12-6 4T
Channels : 2
Width : 128-bit
Memory Bus Speed : 2x 800MHz (1.6GHz)
Min/Max/Turbo Speed : 2x 333MHz (666MHz) - 2x 800MHz (1.6GHz)
Multiplier : 8x
Min/Max/Turbo Multiplier : 10/3x - 8x
Integrated in Processor : Yes
Cores per Memory Controller : 4 Unit(s)
Maximum Memory Bus Bandwidth : 25GB/s

Memory Module(s)
Memory Module : Samsung M378B5773DH0-CK0 2GB DIMM DDR3 PC3-12800U DDR3-1600 (11-11-11-29 5-40-13-6)
Memory Module : Crucial CT51264BA160BC16F 4GB DIMM DDR3 PC3-12800U DDR3-1600 (11-11-11-29 5-40-13-6)

Performance Enhancing Tips
Warning 5400 : Low bandwidth efficiency (advanced). Check memory timings and settings.
Warning 5010 : Cannot use Large Memory Pages due to lack of privileges.
Tip 2 : Double-click tip or press Enter while a tip is selected for more information about the tip.

 

[Darkbreeze]

Try updating the BIOS. Sounds like maybe it's a firmware issue, or it could be related to the controller, or ten other things. I'd start with the BIOS to make sure this isn't a known problem though. Might even be a memory vendor support issue, which again, might be addressed with a BIOS update. Using a single module, have you tried it in BOTH dimm slots?

Try updating to version 2.04 at the following link. Please note that there are 3 different options for each BIOS version. You can choose to update via Instant flash, update in DOS environment or update in Windows environment. Make sure to choose the correct download for the version you want to use. Instructions on how to update the BIOS is available on the same page.

http://www.asrock.com/mb/AMD/FM2A88X-ITX+/?cat=Download&os=BIOS

 

[Kalamake]

For older version? it has 2.4 now. Factory setting done also

 

[Darkbreeze]

No, sorry, that was a type. 2.4 is the version I meant. My bad on the typo. If you're already at that version then that isn't the issue. Perhaps one of those modules has issues. Have you tried to use both modules individually and in both slots?