Question Old Mobo, can i use "L-type" DDR3?

Jan 2, 2020
5
0
10
Aaand issues:

New memory in. Power on, fans come alive, then in about ~sub 10 secs power goes off and it reboots. Fans come alive, but nothing in the screen. No pre-boot screen or anything.

Old memory back in, boots fine.
 
Jan 2, 2020
5
0
10
ITS ALIIIIIVE!!

Old mem back in. Set the voltage to 1.350, new mem in and reset bios. It started.

Lastly. It says i have 32gb, BUT it says 16 is "usable" - what does that mean and how do i get the rest?