I recently bought a new 2x4GB kit of RAM for my Toshiba M750 laptop (originally a 2x2GB kit of RAM) running Ubuntu Server 12.10. However, when I reinstalled from 32bit to 64bit, Ubuntu says I only have 3895MB of RAM instead of around 8000MB.
So I looked around the internet for a bit and I found you could see the installed amount of RAM in the BIOS. When I checked it said I had 8192MB. To make sure my computer supported that much RAM I contacted Toshiba and they said it could.
On the internet I also found memtest86+. So I decided to run it and I got to Test 7 (Pass 44%) and I started getting millions of errors (About 7 million as I am writing this).
Does anyone know why this is the case and possibly how to fix it?