Mushkin redline wont run on 1866

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Ivanbass1

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Dec 9, 2015
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Recently bought 2 kits redline 1866, 2x4.

On my 970a-ud3p 2.0 i cant get them to run at 1866 when all 4 are connected but it runs when ANY teo of the 4 sticks are connected.

Bios is updated.
Ive tried 1866 with xmp, without xmp, same results.. crashes when loading windows, but in bios it says 1866.
Tried making the timings go up, didn't help. Tried upping the cpu nb voltage up to 1.3, didnt help.

Is there something i can do?
Cpu is fx 6300 stable clocked at 4.3ghz with 1.35v, tried upping cpu voltage, didnt help..

Edit: it runs manually set to 1600 now, without xmp. Tried upping memory voltage, also didnt help.
 
Solution
Karadjgne
I believe the memory controller back was actually on the motherboard for AMD cpus, and since the MC was spec'd to work with the cpu and FSB at high frequency (Intel used a plain BCLK of 100 starting with Sandy-Bridge) then it makes sense that the FSB (which also raises memory speeds) would be capped since FX Cpus working speed default is only 1333MHz, compared to Intel which used 1333/1600MHz. Seems the MC just wasn't robust enough to handle 4x dimms at higher than 1600 + FSB + higher voltages needed to sustain the higher frequency across 4 dimms
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Karadjgne

Karadjgne

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Note: Only one DIMM per channel is supported for DDR3-1866MHz and higher speed as using an AM3+ CPU.

From Gigabyte QVL. If you want to run all 4 sticks you'll need to run at 1600MHz.
(although it may be possible to lower timings to 8-8-8-24 vrs most default 9-9-9-27 sticks, which effectively puts the ram running faster than the stock XMP 1866 settings) (Fictional numbers btw, may or may not be entirely possible or stable until you try it)
 
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Karadjgne

Karadjgne

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Dec 26, 2012
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I believe the memory controller back was actually on the motherboard for AMD cpus, and since the MC was spec'd to work with the cpu and FSB at high frequency (Intel used a plain BCLK of 100 starting with Sandy-Bridge) then it makes sense that the FSB (which also raises memory speeds) would be capped since FX Cpus working speed default is only 1333MHz, compared to Intel which used 1333/1600MHz. Seems the MC just wasn't robust enough to handle 4x dimms at higher than 1600 + FSB + higher voltages needed to sustain the higher frequency across 4 dimms
 
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