System cannot detect some RAM

Wolf1991

Honorable
Oct 22, 2013
10
0
10,510
Hi,

I have installed some new RAM into my computer, replacing an 512MB stick with a 2GB one.
After some issues, I have succesfully booted the computer, however the system shows 3,5GB of installed memory (and 2,5GB of this can be used), while it's 4 GB.
The memory sticks' pins are not damaged as far as I know, also, the system (before the new RAM) used to take 10 MB or similar from the RAM, not 512MB...

Specs:

Motherboard: Gigabyte GA-945GM 52
RAM Slots: 4 DDRII
1: Kingmax DDRII 1GB
2: Kingmax DDRII 1GB
4: Kingmax DDRII 2GB (the new one)
Videocard: nVidia GeForce 8600 GTX
CPU: Intel Quad double-core 3.00 Ghz

If anyone can give me a hint why is this happened, I would be very happy :)
 
It looks like your motherboard only supports a maximum of 4GB of RAM which means it's limited to a size of 1GB per slot. That might be the reason why you are having issues although I'm not totally sure. It sounds almost exactly like you're using a 32 bit version of Windows.

http://www.gigabyte.com/products/product-page.aspx?pid=2331&dl=1#sp

The memory section states that your motherboard only supports up to 4GB of RAM. unfortunately the manual located here http://ifsc2.ifsc.usp.br/drivers/Mainboard/GIGABYTE/GA-945%20GM-S2/manual/motherboard_manual_ga-945gm-s2_e.pdf doesn't mention anything about how much RAM you can install per stick.
 

Wolf1991

Honorable
Oct 22, 2013
10
0
10,510
Thanks for the info. Wierd, after changing the frequency to 2.00, the operating system suddenly found 3.25GB of RAM, including the video card's downgrade.
I have no idea what is going on, but as far as my computer works, I don't really care!