i have 3.3gb useable out of 8gb installed, x64 linux mint

after looking at the sys monitor i saw that out of 8gigs i only had 3.3 available. both of the 4 gig sticks are perfectly fine, and the slots are perfectly fine, but it shows 2x4gigs in bios, and 2x4 in lshw. i literally do not understand OS: Linux mint 21.2 cinnamon. cinnamon ver: 5.8.4 lshw shows that i indeed have 2x4gigs of ram description: System Memory physical id: a slot: System board or motherboard size: 8GiB *-bank:0 description: DIMM DDR3 Synchronous 1600 MHz (0.6 ns) product: 8KTF51264AZ-1G6E1 vendor: Micron physical id: 0 serial: 11A01A3A slot: A1_DIMM0 size: 4GiB width: 64 bits clock: 1600MHz (0.6ns) *-bank:1 description: DIMM DDR3 Synchronous 1600 MHz (0.6 ns) product: 8KTF51264AZ-1G6E1 vendor: Micron physical id: 1 serial: 11A01A39 slot: A1_DIMM1 size: 4GiB width: 64 bits clock: 1600MHz (0.6ns) bios also shows 2x4gigs of ram BUT the system info shows i only have 3.3 and the sys gnome monitor shows that i only have 3.3 also, free -m output: total used free shared buff/cache available Mem: 3394 1122 887 24 1384 2016 Swap: 59558 0 59558 any information requested will be provided.