F3-12800CL7D-4GBECO memory frequency

pruitts

Junior Member
May 23, 2011
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I've only managed to get the reported value as Total Memory 4096 MB, Speed 1333 MHz (in the BIOS settings and POST message). Isn't it correct that memory frequency 666.7 MHz means that the memory speed is actually 1333 MHz? I cannot run it in Speed 1600 MHz. If I change the above Memory Frequency into DDR3-1600, the computer refuse to boot and the MemOK! LED in my motherboard lit up. If this happen, I had to push the MemOK! button until the motherboard reset the memory setting to be able to boot and it usually return to 1333/1348 MHz.

If I set the Ai Overclock Tuner into Auto, and Memory Frequency DDR3-1600, my computer is able to boot, but with the timings set into 9-9-9.

So my question is: Is this normal? Do I make a mistake setting my BIOS? How can I get 1600 MHz operating frequency with 7-8-7 timings and 1.35V? Is this has anything to do with EPU Power Saving feature (which I assumed to downgrade my memory to lower spec to save power consumption)?

Any help would be appreciated. Thx.

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