RAM Capacity Not Showing

[Philip_85]

Hey there. So my problem comes from a PC I built. I have purchased and installed 64gb of ram, but only 48gb is available. Originally i was much less, like 14gb, then I went into the BIOS and enabled XMP which raised the capacity to 48gb. DDR4 3200 ram is expensive so I want to be using all of it. And I plan to upgrade to 128gb eventually, which is what my Mobo caps out at.

I am a professional motion designer, graphics artist, game designer, and animator (I do all kinds of graphics-related work), I do a lot with After Effects, PS, Premiere, 3D, Motion Graphics, VFX, digital painting/illustration, photo editing/manipulation, etc, so before the questions of do I need so much ram, the answer is a resounding yes.

I checked with CPU-Z and it is recognizing all 64gb installed, so at least I know the slots and sticks are working.

I have windows 10 pro, 64 bit, which should allow up to 500gb ram. So I'm not sure what is going on here or how I can make the machine recognize my total ram. I am not too keen with BIOS or tampering, I figured out just enough to enable the XMP, but I am not an IT person.
Here is the build:

CPU: intel i7-6850k (https://www.newegg.com/Product/Product.aspx?Item=N82E16819117647)
Mobo: Asus ROG Rampage V Edition 10 (https://www.asus.com/us/Motherboards/ROG-RAMPAGE-V-EDITION-10/)
RAM: G.SKILL Ripjaws V Series 32GB (4 x 16GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Intel Z170 (https://www.newegg.com/Product/Product.aspx?Item=N82E16820232091)
OS: Windows 10 Pro 64-Bit (https://www.microsoftstore.com/store/msusa/en_US/pdp/Windows-10-Pro/productID.319935900?ICID=Windows_Win10ProUpsell_ModD2)

 

[Viking2121]

I had the same issues on my Asus x99 Deluxe, I replaced it with another board and it had the same issue, for me I was using 32GB 4 sticks of ram and 1 stick would vanish, it was always a different stick.

How I fixed it was to give my RAM 1.360v set System Agent voltage to 1.1v and set the ram divider to 100:100 and set the speed manually, in my case 2500mhz instead of 2666mhz what my ram was rated for, 100:133 2666mhz would cause any 1 random stick vanish, lower clocks it would most of the time show all 4 sticks, but every once in a while it wouldn't.

I looked this problem up and its something to do with Asus and x99.

 

[Philip_85]

I had the same issues on my Asus x99 Deluxe, I replaced it with another board and it had the same issue, for me I was using 32GB 4 sticks of ram and 1 stick would vanish, it was always a different stick.

How I fixed it was to give my RAM 1.360v set System Agent voltage to 1.1v and set the ram divider to 100:100 and set the speed manually, in my case 2500mhz instead of 2666mhz what my ram was rated for, 100:133 2666mhz would cause any 1 random stick vanish, lower clocks it would most of the time show all 4 sticks, but every once in a while it wouldn't.

I looked this problem up and its something to do with Asus and x99.

Thanks for the fast response. That would be in the BIOS correct? I will give that a try or try to set that up and let you know.

Ok, so I attempted to make the changes you said. I changed the divider to 100:100 and I dropped the speed from 3200 to 3000. Unfortunately I could not change the voltage as it was set to auto with no other options available, not sure why, but again I am not too keen with tampering in the bios. However after reboot it is now recognizing the full 64gb, so thank you.

 

[Viking2121]

I had the same issues on my Asus x99 Deluxe, I replaced it with another board and it had the same issue, for me I was using 32GB 4 sticks of ram and 1 stick would vanish, it was always a different stick.

How I fixed it was to give my RAM 1.360v set System Agent voltage to 1.1v and set the ram divider to 100:100 and set the speed manually, in my case 2500mhz instead of 2666mhz what my ram was rated for, 100:133 2666mhz would cause any 1 random stick vanish, lower clocks it would most of the time show all 4 sticks, but every once in a while it wouldn't.

I looked this problem up and its something to do with Asus and x99.

Thanks for the fast response. That would be in the BIOS correct? I will give that a try or try to set that up and let you know.

Ok, so I attempted to make the changes you said. I changed the divider to 100:100 and I dropped the speed from 3200 to 3000. Unfortunately I could not change the voltage as it was set to auto with no other options available, not sure why, but again I am not too keen with tampering in the bios. However after reboot it is now recognizing the full 64gb, so thank you.

Default voltage for you're kit is 1.35v mine was 1.2v not sure if 1.2v was just too low on my system.

Yeah im not sure why Asus on the x99 wont read all the capacity, I can see the sticks in CPU-Z when my Asus board was doing that, but it wont show that I have that capacity. I found a big forum about it on overclock.net, and it seems that its a lot of Asus boards on the x99 and 100:133 seems to be a setting the boards don't like, no idea why.

Good luck, and hope you don't have anymore problems!