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Old March 27, 2015, 06:49 PM
Rye 1080's Avatar
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Join Date: Sep 2010
Location: Collingwood, Ontario
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My System Specs

Default Memory Issue.

Memory won't run 1866MHZ in an Ivybridge-E system and it's driving me nuts.

I've got a Asus P9X79 MoBo running Bios version 4701 with a i7 4820k processor. RAM is a 4x4GB GSkill kit, F3-14900CL8Q-16GBZM.

everything works fine at 1600MHZ, but when I set to 1866MHZ 1 or 2 dimms drop out even at 11-11-11 timings. The SPD tool in BIOS shows abnormal on one of the Dimms. Had this problem on 2 different memory kits.

Ive tried 2 different 4820K CPUs and the problem remains. The first would drop 1 or 2 DIMMS the 2nd i've only seen drop 1 DIMM but haven't spent much time on it.

When I use a 3820 everything is fine.

Anyone have some bright ideas?
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Old April 2, 2015, 04:13 PM
KaptCrunch's Avatar
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Join Date: Feb 2008
Location: Ontario
Posts: 4,018

failing memory controller
time to RMA the MB 3yrs ?

how many sticks of ram ? need to look in manual for stick placement for it's different slots with 2 or more stiks

2 stik D_1 & B_1

4 stik A_1, B_1 & D_1, C_1

Last edited by KaptCrunch; April 2, 2015 at 04:25 PM.
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Old April 2, 2015, 04:36 PM
SKYMTL's Avatar
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Join Date: Feb 2007
Location: Montreal
Posts: 13,641

Yup, sounds like the memory controller on the CPU. Try downclocking and loosening timings on the memory. If that fails, add more voltage.
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Old April 3, 2015, 12:40 AM
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Location: Calgary
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My System Specs


i have similar issues with my 4820k. I had corsair 1600 ram originally and it ran better than this gskill 2100 stuff. If I try and set stuff manually it shits on my head. If I run xmp it runs better.
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