A couple of weeks ago i turned off my pc and when i came back from work it wasn't booting anymore. After several tests i found that the PSU died and took with it the motherboard (MSI MAG B650 Tomahawk) and one of the 2 RAM modules (G.Skill F5-6000J3238F16GX2-TZ5NR). I got a new motherboard, same model, and ran memtest on the one working RAM module which gave no errors. Should i get a single new module of the same type to replace the fried? Is it better to get a kit of 2 and put away the one that works? Or should i get a kit of 2 and have 3 modules installed?