I just put my new tower PC together, but windows can use only half of the RAM (32GB of 64GB):
- Motherboard: AB350-GAMING 3
- CPU: AMD Ryzen 7
- 4 RAM Slots with 16GB each
- Windows 10 Pro (64bit) with properly activated & valid licence
This is what Windows shows me:
Task Manager:
Resource Monitor:
msconfig:
I tried changing "max memory" to this (it is automatically filled in when i activate the checkbox, which seems correct for 64GB in MB):
But when i press OK it changes to 256 (before closing). Also when using the up/down controls 256 is maximum. When re-opening the dialog the numer is set to 0 no matter what i left it at.
bcdedit:
I tried setting maxmem using bcdedit, but it did not accept it:
BIOS:
I updated the BIOS from version F10 to F25 (latest):
Supported RAM:
- Supprtorted RAM Windows 10 Pro 64bit: 2TB
- https://docs.microsoft.com/en-us/windows/desktop/memory/memory-limits-for-windows-releases#physical-memory-limits-windows-10
Other actions:
- Windows update is up-to-date
- I updated all drivers using
Driver Easy
Other "solutions" i found on the internet:
- Running
sfc- did that - all ok - Running another windows' system check & correct tool (forgot the name) - but also all ok
- Disable page-file - i tried it - didn't work. (I also know it is not advised for other reasons).
- Disable or enable (instructions were not clear) Memory Remapping in BIOS - didn't find any such option.
- Disable Shared Memory (shared with OnBoard Graphics Card) in BIOS - no such option. Also i am using an "external" graphics-card, not the onboard one.
- Changing RAM Slots (when using just 2 of them) - i use all 4 slots - seems pointless.
- Swapping RAM around in the slots - didn't try - seems pointless - i have 4 identical RAM sticks. Why should it make any difference?
- Adjusting RAM speed multiplier and/or voltage - didn't go into this. All is set to its defaults "auto" - 2400MHZ - found one note, that too high values (above 3000MHZ) can make problems with 4 slots being used. I don't think that's it either. My RAM is recognized, but not used.
I want to use the whole RAM:
So how to fix this?
