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ECS A75F2-M2 won't boot with 1866 RAM+Graphics Card

Hello,

My Desktop Spec as below:
CPU: AMD APU A10-5800K
MB: ECS A75F2-M2
PSU: SilverStone SST-ST60F-P - 600W
Graphics : Asus EAH6670/G/DI/1GD3

no boot issue started when I upgrade RAM from
Kingston KHX1600C9D3K2/8GX
to Kingston KHX1866C9D3K2/8GX

System manage to boot with 1866 RAM if I removed the graphics card. I had confirm also the graphics card is still working when paired with 1600 RAM.

All BIOS setting in default or Auto, no manual setting or OC.
BIOS version: 10/04/2012
9 answers Last reply Best Answer
More about a75f2 boot 1866 graphics card
  1. How many stick of 1866 memory are you using on the system?
  2. 2 x 4GB
  3. It could be that the 600 watt PSU is slightly inadequate, better for a 720 watt PSU.
    You need to use paired modules of ram and not just one stick.

    Sometimes the bios needs certain settings to be manually set like the date and time, the boot sequence priority, and whether the audio is "auto" or the PCIe video is enabled (rather than onboard).

    It only runs the 1866 ram at "Native" setting.
  4. previously, I actually running same spec with 1600 RAM porewred by 400W PSU. after upgrade to 1866 RAM, no post so I assume is PSU. I just bought this 600W PSU but issue still unresolved. based on my spec, 500W already enough.

    Yes, I had provided the model of RAMs, both come with pair, not single RAM.
    I don't think wrong date/time or boot sequence can cause the issue although I already set it correctly. when I said no boot meant powered up but no response at all, no display and can't enter into BIOS too. I did removed the graphics card and already make sure 1866 RAM in setting in native.
  5. Best answer
    Duo to limitation of AMD chipset spec, this model supports up to 1866 MHz for motherboards with a single DIMM per channel.
  6. thanks to ky_ecsusa.

    That's bad, I bought this MB from Newegg and the page:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813135328
    did not stated this limitation clearly. My bad, I did not check ECS Official Web Site before buy.
  7. ky_ecsusa said:
    Duo to limitation of AMD chipset spec, this model supports up to 1866 MHz for motherboards with a single DIMM per channel.


    Question:
    Why I still managed to boot with pair of 1866 MHz of RAMs if I removed discrete graphics card?
  8. still unable to locate the root caused, not even to hope for solution. should I send back ECS RMA?

    update: compatible issue.
  9. Best answer selected by djlah.
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