Intel Motherboards - ASRock X99 Extreme3 not detecting RAM Quad Channel

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ASRock X99 Extreme3 not detecting RAM Quad Channel

Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=3345
Printed Date: 21 Jul 2025 at 7:25pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: ASRock X99 Extreme3 not detecting RAM Quad Channel

Posted By: earwig
Subject: ASRock X99 Extreme3 not detecting RAM Quad Channel
Date 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 http://www.i.imgur.com/QO72BgO.png" rel="nofollow - 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.

http://www.i.imgur.com/pJZGjcs.jpg" rel="nofollow - It also was stuck on 2133 not 2400 but I fixed that.

http://https://i.imgur.com/pJZGjcs.jpg" rel="nofollow - http://www.i.imgur.com/VGVUe4p.jpg" rel="nofollow - Another screenshot

http://www.i.imgur.com/VGVUe4p.jpg" rel="nofollow - http://https://i.imgur.com/VGVUe4p.jpg" rel="nofollow -

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?
http://https://i.imgur.com/pJZGjcs.jpg" rel="nofollow - http://https://i.imgur.com/VGVUe4p.jpg" rel="nofollow -

Replies:

Posted By: earwig
Date Posted: 01 Sep 2016 at 8:24am

SOLVED: Had to switch XMP from auto to the other profile.

Posted By: wardog
Date Posted: 02 Sep 2016 at 7:33pm

X99's seem to be very very finicky concerning memory.

Glad to hear you solved it.