PSU compatibility

I was wondering if I could use a PICO PSU for my Motherboard's miscellanious(24pin connector) components(fans,HDD,north bridge, ram etc) but for my GPU and CPU an external PSU!? Is the pico PSU going to interfere with my plan to connect the CPU and GPU from a different PSU (external)!! My...

Iam just upgrading after 7 years to AMD 5800x and an ASUS TUF Gaming X570-Plus wifi version. My PSU is old from 2015 it's a corsair CX850M I am wondering if this PSU will work with this mobo or do I need to buy a new one or anything I am not planning to overclock. My PSU...

I want to upgrade from 8gb of RAM to 16gb. This is the motherboard i'm using: Asus P8z77-V LK Motherboard (ATX LG1155) and the RAM: G-Skill 8gb (2x4) DDR3-1600 I was thinking of buying this...