PC won't post with 3 sticks of ram but runs dual channel fine

[trippseventeen]

CPU- i5-4430. Motherboard ASUS B85M-G rev 1.1(newest official bios), RAM- 2x 4GB Corsair CMZ8GX3M2A1600C9. GPU- RX 580. The other stick of RAM I'm trying to use is 1x 8GB Crucial CT102464BA160B.C16FER. All three sticks work great. I ran all three simultaneously in my old AMD system,but this setup will not POST with 3 sticks. All the DIMM slots work. It's really annoying me and I'd like to figure out why it won't work. XMP is enabled in bios(2x4 running at 1600mhz)

EDIT: I just had to plug the 8gb in slot 1 ,and the 2x4 in slots 2 and 4. It booted up and is running fine,albeit at 1333Mhz

 

[RememberThe5th]

The timings must be off, check in amd system in CPU-Z at memory tab or spd for timings of 3 rams. And post here, it should be like Slot 1 , Slot 2 and Slot 3.

Or probably Asus cannot run it.

 

[trippseventeen]

The timings must be off, check in amd system in CPU-Z at memory tab or spd for timings of 3 rams. And post here, it should be like Slot 1 , Slot 2 and Slot 3.

Or probably Asus cannot run it.

The Corsair is 9-9-9-24 at 666.7MHz,as is the Crucial. At 800MHz the crucial is 11-11-11-28 and the Corsair(XMP) is 9-9-9-24. I'm pretty new to Intel,I haven't had one since the Core2Duo days. Could I enable XMP for the dual channel set only,and have the Crucial stick run normally?

 

[RememberThe5th]

I think you need manually set timings for Corsair first in settings, try 10-10-10-25 1T or 2T, and then save and shutdown, plug the crucial and try to boot.
Expect instability and crashes.
If it manages to stay stable for atleast half an hour increase voltage to 1.65V.
But i think its trial and error.

 

[trippseventeen]

I think you need manually set timings for Corsair first in settings, try 10-10-10-25 1T or 2T, and then save and shutdown, plug the crucial and try to boot.
Expect instability and crashes.
If it manages to stay stable for atleast half an hour increase voltage to 1.65V.
But i think its trial and error.

I got it sorted. All 3 sticks are running at 1600mhz. As I stated earlier ,I'm not very familiar with Intel systems,so this was largely due to that. I put the two corsair sticks in the first two slots,and the crucial stick in the 3rd,booted into bios to confirm and it's been running fine. This motherboard has a black,then yellow slot(a1/a2) and the same for the next two(b1b2). I'm used to one color being channel A and the second color being B. Lol

 

[RememberThe5th]

I forgot that thing totally...