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2x G.SKILL Sniper Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) F3-14900CL9D-8GBSR on GIGABYTE GA-990FXA-UD3

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September 3, 2013 5:47:09 PM

I had the first 8 gig set running fantastically at 1866 along with my FX-6350, and decided to order a second set. After installing and checking the XMP settings in bios i restarted and my computer failed to boot. It's currently running at 1600 but is very sluggish. What can i do to run the full set at 1866?
September 3, 2013 6:42:02 PM

If there is a docp option, use that. I believe docp is for amd and Xmp is for intel.
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a c 1985 } Memory
September 3, 2013 6:45:49 PM

To be honest might not be able to, many of the 6350s can't even run 1866 and the FXs are 'rated' only up to 2 sticks of 1866

http://www.amd.com/us/products/desktop/processors/amdfx...

http://support.amd.com/us/kbarticles/Pages/ddr3memoryfr...

Think I'd try at 1600, 9-9-9-25, 2T or 2N, 1.5 if good there up to 1866, 9-9-9-27, 2T or 2N, DRAM voltage at 1.55 and raise CPU/NB to about 1.25
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September 3, 2013 6:48:47 PM

Thank you very much for the quick replies :)  i will try these out when i get finished with my current match.
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a c 1985 } Memory
September 3, 2013 7:12:32 PM

Drop an update and let us know ;) 
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September 3, 2013 7:16:11 PM

will do, thanks bud.
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September 3, 2013 7:34:47 PM

i got it to boot with the 1600 settings, however it is a bit slower than before i changed the settings. I also attempted to boot the 1866 settings and could not.
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a c 1985 } Memory
September 3, 2013 7:37:50 PM

At 1600 could try changeing the CR to 1T or 1N (should be at 2) with things as is or drop CL to 8 i.e. instead of 9-9-9 go 8-9-9 initially
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September 3, 2013 7:41:21 PM

i have a bunch of pics of my bios screens with the info i had there if that may help at all.
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a c 1985 } Memory
September 3, 2013 7:49:23 PM

Would, Yes
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September 3, 2013 8:12:32 PM

these are from the original 1866 settings you gave, right after i was forced to go back to bios or load defaults.
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September 3, 2013 8:15:51 PM

The 9-9-9-25 1 settings are running better than I've had since i put the second set in.
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a c 1985 } Memory
September 3, 2013 8:18:30 PM

In you first pick are showing DRAM voltage as 1.154 it should be 1.5 or 1.55
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September 3, 2013 8:18:59 PM

oh lawdy, let me adjust that.
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September 3, 2013 8:35:42 PM

failed again on the 1866, i booted with optimized defaults and its running alright now. Is there another processor i can pop in here to handle this, or is this the best i can do for now? Thanks again for all the help.
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a c 1985 } Memory
September 3, 2013 9:01:26 PM

Some 8350s can run this, could try 8320 or maybe 8150
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a c 104 } Memory
September 4, 2013 9:41:01 AM

It may also be that the two kits do not match well enough to operate at the high speed of DDR3-1866. This is why we must produce 16GB kits that are pre-matched, tested, and guaranteed from factory to work in a single system.

Thank you
GSKILL SUPPORT

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