Fatal1ty X99 Professional Gaming i7 Memory Problem

I have 4 modules of 4gb model Gskill F4-2400c15-4grk. The bios detects the 16 and only lets you use 8. The same happens in windows, the CPU-z application shows the 16 but the windows only lets you use 8. See the images. . Everything was working perfectly on my previous motherboard model MSI x99x Gaming 7.

Edited by betowender - 01 Feb 2017 at 4:37pm

Xaltar wrote: Update the BIOS to the latest version using the "instant flash" option. It is the safest method and we always recommend it.

wardog wrote: 1.40 is the latest. BETA or not. What is the 16GB(4x4GB) G.Skill kit, KIT, part number. What version/flavor of Windows is this reporting as 8GB usable? Windows key > Run > msconfig > Boot tab > Advanced options > Maximum memory - if this is checked then uncheck it, click OK, then Apply, and reboot immediately afterwards.

wardog wrote: What is the 16GB(4x4GB) G.Skill kit, KIT, part number. What version/flavor of Windows is this reporting as 8GB usable?

Still waiting on answers to the above two questions.

Memory KIT part number

and

Windows 10 Home, Pro, or other. And also x86 or x64

Thanks for the pics. Got 'em both.

While appreciating both choices of the two high performance kits you have, neither is certified by G.Skill or Corsair to function on the X99 Gaming i7.

Regardless of the motherboard manufacturer all X99 systems are extremely finicky concerning memory. I hate to say it but you've fallen prey to the downside of X99 memory compatibility in your two choices of memory kits you have.

Picking and choosing memory for an X99 system differs greatly compared to the previous generations where a gray area existed. The motherboard manufacturers _and_ memory manufacturers are acutely aware of what does and what does not function on Brand X's X99  motherboard.

Regarding this, you can choose to contact ASRock Tech Support yet I fear a BIOS being issued to address your compatibility issues wouldn't be something I'd hold my breath on. It's deeper than simply BIOS issue. Nor is is strictly an ASRock "issue" as all brands of X99 boards are finicky. It's inherent to the X99 platform in general.



If you still have a return grace period on one or both kits I highly recommend returning one or both kits and in their absence instead choose a compatible kits using the below memory manufacturers Memory Finder compatibility matrix's. This way you forego the compatibility headaches and instead receive a kit that has been tested on/against the X99 Gaming i7 and comes with a Guarantee of Compatibility by them.


A short list compiled and updated by myself while helping Users here determine compatibility issues.


http://www.gskill.com/en/configurator

http://www.corsair.com/en-us/memory-finder

https://patriotmemory.com/memory-finder/

https://www.kingston.com/us/memory/search/Options

http://www.crucial.com/usa/en/advisor?cm_re=top-nav-_-flyout-memory-_-us-memory-advisor

http://www.pny.com/support/memory-configurator


Keep me posted please. And know, I feel your pain. Benn there, done that.