ASRock X99 Extreme3 not detecting RAM Quad Channel

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   I recently purchased G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-2400 Memory to double my RAM from 16gb to 32gb. However it didn't work in my motherboard ASRock X99 Extreme3 ATX LGA2011-3 Motherboard.

After doing some reading I found out that my motherboard only accepts
 4 sticks if it's all the exact same. I previously had Crucial as well. 
So I purchased some more G.Skill
 Ripjaws V Series 16GB (2 x 8GB) DDR4-2400 Memory. However now I can only detect 2 at a time.
It was detecting the 2 G.Skill in slots 3&4, then I removed 3&4 so it detected 1&2. I then put 3&4 back in but it only detects 1&2. Basically it preferences whatever was previously alone in the computer.
It also was stuck on 2133 not 2400 but I fixed that.
Another screenshot

Basically all slots work and all sticks work but it's staying on dual channel. Is there a way to manually switch it to quad channel memory?

Edited by earwig - 31 Aug 2016 at 5:25pm

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earwig Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 31 Aug 2016 Status: Offline Points: 4	Post Options Post Reply Quote earwig Report Post Thanks(0) Quote Reply Topic: ASRock X99 Extreme3 not detecting RAM Quad Channel Posted: 31 Aug 2016 at 5:22pm
	I recently purchased G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-2400 Memory to double my RAM from 16gb to 32gb. However it didn't work in my motherboard ASRock X99 Extreme3 ATX LGA2011-3 Motherboard. After doing some reading I found out that my motherboard only accepts 4 sticks if it's all the exact same. I previously had Crucial as well. So I purchased some more G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-2400 Memory. However now I can only detect 2 at a time. It was detecting the 2 G.Skill in slots 3&4, then I removed 3&4 so it detected 1&2. I then put 3&4 back in but it only detects 1&2. Basically it preferences whatever was previously alone in the computer. It also was stuck on 2133 not 2400 but I fixed that. Another screenshot Basically all slots work and all sticks work but it's staying on dual channel. Is there a way to manually switch it to quad channel memory? Edited by earwig - 31 Aug 2016 at 5:25pm

earwig Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 31 Aug 2016 Status: Offline Points: 4	Post Options Post Reply Quote earwig Report Post Thanks(0) Quote Reply Posted: 01 Sep 2016 at 8:24am
	SOLVED: Had to switch XMP from auto to the other profile.

wardog Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 15 Jul 2015 Status: Offline Points: 6447	Post Options Post Reply Quote wardog Report Post Thanks(0) Quote Reply Posted: 02 Sep 2016 at 7:33pm
	X99's seem to be very very finicky concerning memory. Glad to hear you solved it.