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B45M Steel ledgend Cant use all installed memory

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Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
Printed Date: 27 May 2024 at 2:58am
Software Version: Web Wiz Forums 12.04 -

Topic: B45M Steel ledgend Cant use all installed memory
Posted By: dusanyu
Subject: B45M Steel ledgend Cant use all installed memory
Date Posted: 14 Sep 2022 at 4:12pm
I have the above mentioned mainboad and windows stated that i have
16.0 GB (7.93 GB usable) Booting into a Live Linux USB I see the same issue the BIOS see all of the memory as the system information on the BIOS stated there is 16 GB ram installed.

* Installed CPU is a AMD Ryzen 5 1600
* The memory is 4 4GB sticks (every slot in the board is populated)
* I have a Discrete GPU so the memory is not being shared for graphics
* As this same issue shows in Linux it is safe to assume it is not windows configuration issues
* I tested the RAM modals by running the machine with only 8GB installed with both set of memory
* sticks have been reseated
* Board is updated to the latest Revision and the settings are stock outside of enabling Trusted Computing and secure boot.

Posted By: dusanyu
Date Posted: 14 Sep 2022 at 4:17pm
*bios is latest revision rather
I should not be posting at 3 AM

Posted By: dusanyu
Date Posted: 17 Nov 2022 at 6:47pm
bumping this as no response from asrock offishal

Posted By: eccential
Date Posted: 18 Nov 2022 at 2:10am
Other than trying 2 sticks at a time to eliminate possibility of bad DIMM(s), can't think of anything. I guess you could also try populating different slots with the 2 sticks, even though the normal recommendation is to use the further away from CPU slot per channel.

Posted By: dusanyu
Date Posted: 18 Nov 2022 at 3:57pm
tried all of that and ran a test on the sticks they all tested fine

Posted By: dusanyu
Date Posted: 26 Nov 2022 at 4:16am
At this point i am contacting Square trade i requested support via the web form three months ago and have had no reply it is clear the board is broke and ASROCK does not support there products.

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