It's a terrible time to be buying RAM but it's also not going to get much better in the future, prices of ram (new) have doubled in the last month it's crazy! Flippin AI eating up all the supply.
Melting power connectors are scary man... It's one reason I will never ever ever buy a GPU with the new HPPCIe cables..
I had a gander into mining Monero before but quickly found out that CPU/GPU mining anything really is only viable if your energy is free or extremely cheap. Here in the UK it's flat out impossible to profit without solar. I doubt even with more modern hardware helps much.
RE: Mining Farm Upgrades and More To Come But NOT Without Challenges