PC Reserving varying amounts of memory for hardware

Maverin1

Honorable
Jul 26, 2012
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This is actually my friends computer so I'm not 100 percent sure on all of the details. I built the computer for him a few years ago and off the top of my head it is:

fx-6300
Radeon 7850
MSI Motherboard
Windows 7 x64
16GB RAM (4 x4)

It was initially built with 8 gigs of ram, I don't have the exact model numbers on me but I can get that. The computer had no issues until he decided to upgrade to 16gb. He matched the model numbers and bought 2 more 4gig sticks of identical ram. I put it in for him and all was well. The other day his PC froze and when he turned it back on it said 16 (12 usable), with 4 gigs being hardware reserved. We updated chipset drivers and restarted and it said 16 (8 usable) with 8 hardware reserved. Now, consistently, every time we restart the computer it switches back and forth between reserving 4 and then 8 gigs.

This just popped up out of the blue. We have made sure that there isn't a max ram setting and searched the BIOS, which also recognizes all 16, but found nothing indicating a limit of any kind.
 
Solution
The only thing that would reserve 4Gb to 8Gb of system memory would be if the board had on board graphics of any kind Maverin.

If the case the amount of system ram reserved for it can be set in the bios.
The other thing to check when you get the problem you are seeing in to make sure that a system with more than 4Gb of memory fitted to it has the option in the bios of - Memory hole remapping set to enabled.

Look in the bios setup for the motherboard again for these two settings, change them.
And then save the new settings before you exit the bios.

It should fix the problem.
The only thing that would reserve 4Gb to 8Gb of system memory would be if the board had on board graphics of any kind Maverin.

If the case the amount of system ram reserved for it can be set in the bios.
The other thing to check when you get the problem you are seeing in to make sure that a system with more than 4Gb of memory fitted to it has the option in the bios of - Memory hole remapping set to enabled.

Look in the bios setup for the motherboard again for these two settings, change them.
And then save the new settings before you exit the bios.

It should fix the problem.
 
Solution