Dual Channel DDR4 RAM causing CPU Error

[Jwpanz]

Hello, all,
I have an Asus Z170-AR motherboard, i5 6600K @ 4.3 GHz, and 16GB of DDR4 RAM by Crucial Ballistix LT.
My issue started when I plopped a second 8GB module of RAM into my motherboard. I had one stick in A2 and the other in B2 and my motherboard wouldn't post. The CPU LED stayed solid and my motherboard went into an infinite boot loop. I have to keep my RAM in single channel mode in slots B1 and B2 as neither of the A slots work.
Do I have bad RAM slots or is there something else at play here? No bent pins in the socket, by the way.
Thanks, everyone.

 

[Dark Lord of Tech]

Also make sure your cooler isn't tightened down too much , can cause this issue too.

 

[thx1138v2]

"My issue started when I plopped a second 8GB module of RAM into my motherboard." That sounds like you were running one stick of RAM and some time later purchased and added another stick. If that's not the case, ignore this post.

RAM is sold in "kits" that have had the multiple sticks of RAM tested together. Single sticks purchased at different times often don't work together even if they are the exact same part number. Wear and tear on the manufacturing equipment and possibly different environmental parameters during manufacture can cause manufacturing process variations that affect the final product. Some times even sticks from the same batch don't work together. That's why the "kit" sticks are tested together by the manufacturer before they are shipped.

You might try "down clocking" the RAM to see if they will work together in dual channel mode. Or try borrowing a friend's "kit" sticks to see if they work properly in the sockets.