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Questions about GIGABYTE products => Motherboards with AMD processors => Topic started by: alucke on October 16, 2015, 02:27:29 am

Title: GA-990fxa-UD5-R5
Post by: alucke on October 16, 2015, 02:27:29 am

I just upgraded my hard drive to a SSD, now windows 10 properties windows says 32gb ram/ 16gb usable.  I have cleared the cmos with the jumper, reseated the ram.  I also tested the ram with memtest, and everything is working.  Anyone have any idea why Windows 10 is using only 16gb out of 32gb of ram? 

Alucke

Title: Re: GA-990fxa-UD5-R5
Post by: rinkol on October 16, 2015, 03:26:40 am

Quote from: alucke on October 16, 2015, 02:27:29 am

I just upgraded my hard drive to a SSD, now windows 10 properties windows says 32gb ram/ 16gb usable.  I have cleared the cmos with the jumper, reseated the ram.  I also tested the ram with memtest, and everything is working.  Anyone have any idea why Windows 10 is using only 16gb out of 32gb of ram? 

Alucke

Under "System" my Windows 10 installation shows "Installed memory (RAM): 16.0 GB"  with nothing about usable memory.

Does memtest show and test the full 32 GB memory space? I know windows 7 Home Premium has a 16 GB limitation, but you should be ok with any later 64-bit Windows version.

Go to MSCONFIG/BOOT/ADVANCED OPTIONS and check whether the maximum memory is check marked.

If still no resolution, remove one memory stick, reboot and shut down, install the second memory stick and reboot, taking care to disconnect power when changing memory modules. You can also try different slots.

Title: Re: GA-990fxa-UD5-R5
Post by: alucke on October 16, 2015, 02:15:30 pm

The bios sees the 32gb of ram.  I installed one stick at a time,  and the same thing happens.  I am currently running Windows 10 Pro x64.  I also removed the battery from the motherboard for 15 secs.  I am at my wits end. 

alucke

Title: Re: GA-990fxa-UD5-R5
Post by: AgentFXA on October 17, 2015, 04:20:33 am

step down ram speed 1 notch and check again may help

Title: Re: GA-990fxa-UD5-R5
Post by: alucke on October 17, 2015, 02:11:23 pm

I stepped down the ram speed on notch.  That did not fix the ram issue.  I have a support ticket about this problem with gigabyte.  I am thinking it's either a ram problem, or a motherboard problem.

alucke

Title: Re: GA-990fxa-UD5-R5
Post by: alucke on October 18, 2015, 10:22:00 pm

I went back to 8.1, ran Rammap.  and 16gb are driver locked.  Anyone know how to remove the driver lock from the ram?
Any help would be appreciated.

alucke

Title: Re: GA-990fxa-UD5-R5
Post by: rinkol on October 20, 2015, 12:38:18 am

Quote from: alucke on October 18, 2015, 10:22:00 pm

I went back to 8.1, ran Rammap.  and 16gb are driver locked.  Anyone know how to remove the driver lock from the ram?
Any help would be appreciated.

alucke
[/quote

It sounds like memory space is being reserved for some program, such as a disk caching utility, on your computer. What happens if you boot in safemode?

Robert

Title: Re: GA-990fxa-UD5-R5
Post by: alucke on October 20, 2015, 12:52:53 am

even in safe mode, with the minimal to boot, it still shows 32gb(16gb usable).  So I guess I will order a new motherboard, since no one is able to tell me how to fix this.

alucke

Title: Re: GA-990fxa-UD5-R5
Post by: AgentFXA on October 21, 2015, 04:16:09 am

Just crossing my mind - in the bios is IOMMU enabled?

try it!