RIVE + 64 GB Corsair Dominator (8x8) RAM - only recognizes 48GB

[ksultan]

Hi,

Need some help here. All 8 modules are well seated, were tested individually, and all are functional. Yet when all 8x8GB are placed on Rampage IV Extreme mobo, BIOS reports only finding 48 GB.

Stranger yet - the BIOS finds each DIMM in each channel and recognizes it (amount, speed, timings, etc...) so the board knows the RAM is there, it simply won't acknowledge post-48GB.

I decided to not stress and install the OS - perhaps it was a BIOS reporting glitch. Win 8 Pro x64 only reports 48 GB though. I bought this mobo for the 64GB support - it's even on the box - but I can't get it to acknowledge all ram. All ram is functional, tested individually, and properly seated. Seems to be a BIOS issue.

A thorough search of the net yielded 2 other people this had occurred to - same issue encountered (different ram, but all QVL) - however NO response on how to fix this issue.

Anyone? I'm desperate for my last 16GB (and yeah, I need it, I do a lot of rendering). CPU is i7-3960x. RIVE BIOS has NOT been updated - the sticker on the box of "Win 8 ready" was a little rushed guys - the ASUS support CD won't install - instead reporting: "This OS is NOT supported". 😞

[maplion]

I came across this thread when searching for an answer to the same problem. What I found was that the DRAM timing in BIOS, when set to AUTO, defaults to 2133 MHz. I manually chose the 3200 MHz speed of my Corsair 8 GB sticks and then all 64 GB were recognized upon reboot.

[maplion]

maplion wrote:
I came across this thread when searching for an answer to the same problem. What I found was that the DRAM timing in BIOS, when set to AUTO, defaults to 2133 MHz. I manually chose the 3200 MHz speed of my Corsair 8 GB sticks and then all 64 GB were recognized upon reboot.

I had some minor RAM instability using this method [overclock would fail about once every few days], so I did some more homework and had to do some additional tweaking to try to resolve some of the stability issues. Right now I am testing out the TPU option, which tries some overclock settings for you based on its own analysis. So far, it seems to be working well. It chose 2666 MHz and all 64 GB are seen by the system still.

[Nate152]

Hi maplion

Welcome to the ROG forum !

Good to hear all of your ram is recognized and working, instead of posting in an old thread you can start a new one. 🙂

[maplion]

Nate152 wrote:
Hi maplion

Welcome to the ROG forum !

Good to hear all of your ram is recognized and working, instead of posting in an old thread you can start a new one. 🙂

Thanks and will do; I just thought I'd post in here since this was the main thread that came up when I searched for the 64 GB problem initially and I figured it might be the same result for others that are searching.

On an aside, it turns out my "instability" was none other than my computer sleeping after 30 min, which was lowering the voltages and crashing the computer; turned it off and everything seems great.