Does the FX-6350 support Quad-Channel RAM that's clocked at 1866mhz?

Alan Quintero

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Apr 1, 2015
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I have the FX-6350 paired the ASRock 990FX Extreme 4 Motherboard, and I'm having trouble having the RAM clock at 1866. I do enable the XMP profile to set it at 1866 but, every time I do so. My computer hangs at the splash screen. I can tell it hangs since my keyboard doesn't light up, but will, once it's set to default 1600.

Strangely the motherboard is rated at 1866 without having to manually OC. Any ideas?
Thanks in advance.

CPU:FX-6350
MOBO: ASRock 990FX Extreme 4
RAM:G.Skill Ares 4GB @ 1866 mhz x 4
PSU: 650W Corsair 80 Bronze.
GPU: ASUS GTX 980 4 GB
 
Solution
Officially, the FX series of CPU's support 1866 MHz for two DIMM's within a two slot motherboard. For four DIMM's installed in a four slot motherboard, the supported frequency drops to 1600 MHz. This is probably why there are difficulties trying to get four DIMM's to run at 1866 MHz.

However. Increasing DRAM Voltage and NB Voltage (as mentioned above) may help. Set DRAM Voltage to around 1.60 V, and NB Voltage to at least 1.25 V.

If still no good, then increase NB Voltage to 1.30 V.

Could go a bit higher with the voltages, if necessary, for DRAM Voltage of 1.65 V, and NB Voltage of 1.35 V.

Overclocking the CPU may (also) be necessary to get the four DIMM's to run at 1866 MHz. Increase the CPU Multiplier...

Alan Quintero

Reputable
Apr 1, 2015
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4,510


I've tried. Got constant hangs.
 
Officially, the FX series of CPU's support 1866 MHz for two DIMM's within a two slot motherboard. For four DIMM's installed in a four slot motherboard, the supported frequency drops to 1600 MHz. This is probably why there are difficulties trying to get four DIMM's to run at 1866 MHz.

However. Increasing DRAM Voltage and NB Voltage (as mentioned above) may help. Set DRAM Voltage to around 1.60 V, and NB Voltage to at least 1.25 V.

If still no good, then increase NB Voltage to 1.30 V.

Could go a bit higher with the voltages, if necessary, for DRAM Voltage of 1.65 V, and NB Voltage of 1.35 V.

Overclocking the CPU may (also) be necessary to get the four DIMM's to run at 1866 MHz. Increase the CPU Multiplier (only) a bit at a time until stable operation of the DIMM's at 1866 MHz is achieved.
 
Solution

myboysjj

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Feb 23, 2013
17
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10,510


 

myboysjj

Honorable
Feb 23, 2013
17
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10,510
not your fault. lot of motherboards do not seem to like 1866 ram. if new I'd try to send back and get 2133 which is a little faster and seems to register ok. if not just let mb read it at 1600 as no real difference and not worth all the bs to try and get 1866. if you read reviews on 1866 ram you'll see lots of people have same problem...........................
 
Boot with ram at 1600mhz.
Run cpu-z
Open SPD tab
Write down the timings & voltage from the 933 (1866) tab

59cd4535_CPU-Z20SPD.png


Enter bios & enter the readings manually - will likely have to be done for each slot seperately on your board)
 

Tradesman1

Legenda in Aeternum
It's not the mobo, it's the memory controller which is in the CPU. FX CPUs are rated up to 1866 at 1 DIMM per channel and that's for the higher end FX CPUs, 8xxx, the 6350 is a mid line FX, not all can run the higher freqs. To do so often requires, looser timings and/or additional voltages as mentioned
 
Honestly any 970 or 990 series board I've ever dealt with has insisted on using 1600mhz timings & voltages when ram is set to faster speeds.
Its always been a simple case of changing these to the jedec ratings shown in cpu-z manually.
There should be no issues once this is done.
 

Tradesman1

Legenda in Aeternum

_________________

If the CPUs MC can't handle the data rate you can play all you want and get nowhere