Problem with memory , 2GB instead 4 GB ,windows 7

tombie

Reputable
Nov 22, 2014
2
0
4,510
I have GA-P55-UD3L motherboard , 4GB DDR3 ram ( seperated in 2 channels , 2GB per channel ) . Windows 7 says that i have 2gb hardware reserved memory and i can use only 2 gb . I checked the Bios and says that i have only 2 GB usable , but i can see the other 2 GB in the second channel in the memory section of Bios . What can i do ?
 
Solution
If using x86 Windows, then:
How graphics cards and other devices affect memory limits:
Devices have to map their memory below 4 GB for compatibility with non-PAE-aware Windows releases. Therefore, if the system has 4GB of RAM, some of it is either disabled or is remapped above 4GB by the BIOS. If the memory is remapped, X64 Windows can use this memory. X86 client versions of Windows don’t support physical memory above the 4GB mark, so they can’t access these remapped regions.
If using x86 Windows, then:
How graphics cards and other devices affect memory limits:
Devices have to map their memory below 4 GB for compatibility with non-PAE-aware Windows releases. Therefore, if the system has 4GB of RAM, some of it is either disabled or is remapped above 4GB by the BIOS. If the memory is remapped, X64 Windows can use this memory. X86 client versions of Windows don’t support physical memory above the 4GB mark, so they can’t access these remapped regions.
 
Solution