That's is because it is remapped to addresses above your usable RAM. Actually, I believe a chunk of your RAM that corresponds to the upper part of the 4GB address space used by the PCI-e graphics is mapped to a higher address space. It is just easier thinking about the graphics/PCI-E i/o space being mapped up above your RAM addresses.
Last edited by GeneO; 11 Jul 2011 at 23:14.
any os reserves part of the ram memory for device bus like gpu, pci cards, display buffer etc. due to this part of your ram is showing as system reserved and cannot be addressed by the cpu. the best solution would be to put more ram rather than limiting the ram for system reserved processes from the bios.
hope it helps you out
In many of the newer AMD systems it has a bios setting for sideport, UMA and sideport+UMA. If you have a dedicated graphics card, you can change the default Sideport+uma to just sideport. UMA designates a portion of your physical memory to graphics use exclusively and is not available to the rest of the system. By disabling that you will free up memory.
This can also occur if you have two different types of memory installed. I saw this on a Dell Precision T5400 where 4x2GB (8GB) of RAM was added to a workstation that already had 4x512M (2GB) of RAM installed, filling all available slots. Recognized and identified the size of each DIMMS, however total memory as stated by BIOS was 5GB.
Windows 7 x64 Pro also saw 10GB, but only 5GB was available. Removing the 4x512MB modules allowed both the BIOS and the operating system to "see" 8GB.
my RAM doesent get enabled, it says i have 12gb but only 4GB usable, I have tried to enable ''memory reamp feature'' I have tried also to use maximum memory on BOOT advanced options on msconfig, but nothing works.
realy want to use it all.
Can you please provide more details about your hardware. Your "system specs" are empty.
Also, can you run CPU-Z and post screenshots here of its various tabs? In particular its Memory and SPD tabs (with SPD for each of your memory slots) would be very useful.
Finally, can you post a screenshot from TASKMGR, -> Performance tab -> RESOURCE MONITOR button -> MEMORY tab, and then the lower part of the window that shows PHYSICAL MEMORY.
I'm having the same issue.
I have reseated each of the 4 RAM modules.
With all 4 modules installed it shows 8.00 GB (3.21 GB usable).
I have booted with only 2 installed, and it shows as 4.00 GB installed, but still the 3.21 usable.
I really just think it has something to do with the motherboard, I have 2 other pc`s that it`s happened on and I`ve never found a way to change it.
And simply installing 64 bit is not the answer either.
Savage one your issue is because you are using 32bit windows
If you were using 64bit you would be able to use all of the ram sorry to say but you wasted money on a 8gb kit
Hardware reserve is either onboard graphics gobbled it up or another device that uses shared ram
if he had a solid GPU it wouldn't be much for hardware reserve because it has it's own dedicated ram
Quote