Hi dear enthusiasts ,
I recently received a computer case with a Gigabyte motherboard from a friend of mine. The motherboard did not have any hard drive, GPU and RAM. So, I bought the RAMS and the GPU off Ebay and used my old laptop’s HDD which had a 64-bit windows 7 on it. I have already confirmed that my processor is a 64-bit processor using the “securable” software. I also updated my BIOS to its latest version (which was a beta version). Everything seems to be working fine now, but apparently only 2 GB of my 4 GB RAM is usable (even though the whole 4 GB is recognised). I have done the following so far based on other forums and articles:
- I have gone into “msconfig” and made sure that the maximum memory option is unticked.
- I have gone into the “resource monitor” and have confirmed that 2 GB of my RAM is marked as reserved hardware memory. Moreover, I could not find any memory mapping option in the BIOS.
- I tried taking the RAMs out and putting them back in again. I noticed that only when one 2 GB RAM module was in, yet again only half of that ( 1 GB) was only usable.
I read an article in this link and there was something related to GPU memory mapping written in it which I could not understand:
For example, if you have a video card that has 256 MB of on-board memory, that memory must be mapped within the first 4 GB of address space. If 4 GB of system memory is already installed, part of that address space must be reserved by the graphics memory mapping. Graphics memory mapping overwrites a part of the system memory. These conditions reduce the total amount of system memory that is available to the operating system.
I just cannot be sure what is causing this. Is it my GPU or RAM incompatibility with motherboard or something else? How can I rule these possibilities one by one and find the culprit?
Many thanks in advance!!
I have also attached the specs of my desktop computer, courtesy of CPU-Z software. It seems to be a bit too exhaustive, but basically slide to the right spots for the crux of the information regarding the RAM, GPU and etc.