david@david-laptop:~$ cat /var/log/Xorg.0.log | grep RAM
(II) I810(0): Will attempt to tell the BIOS that there is 12288 kB VideoRAM
(II) I810(0): BIOS now sees 12288 kB VideoRAM
(--) I810(0): Pre-allocated VideoRAM: 7932 kByte
(==) I810(0): VideoRAM: 65536 kByte
(II) Initializing built-in extension XINERAMA