I was always told never to mix and match ram sticks but I'm currently using 3 different kinds of ram that are all the same speed and size and it's running just
Will mixing RAM sticks decrease performance if RAM specs and sizes are exactly the same? - Quora
Using mismatched RAM sticks with dual channel memory? : r/buildapc
Single-Channel vs. Dual-Channel RAM - History-Computer
Can I Use 2400 and 3200 RAM together?
Which RAM Slots Should You Use?
Is uneven ram okay? : r/pcmasterrace
Why Is My RAM Not Running at Full Speed? [5 Reasons and How To Fix]