PC requirements for D5 render

Hello i have a question and i would appreciate if i can get an answer . I recently built my first on January 2025 . i can say i regret so much coz i didn’t do enough research. i built my pc coz i am a student pursing architecture and i needed it for the architectural software. i use D5 render to do my architectural renders and it demands a good pc. i bought a GIGABYTE B450M DS3H V2 AMD AM4 Gaming Motherboard without wifi,RTX 3060 12 gb ram, 16 gb ddr 4 ram 3200 ,msi mag laevatain 100l,ryzen 5 5600, Uphere Cpu cooler ,Power supply 650 w. i recently upgraded to 64 gb ram. When i use archicad my pc crashed like twice with the blue screen error and also ArchiCAD crashed but d5 render runs smoothly with the 64 gb and it doesn’t crash at all. i removed one of the 16gb ram and i worked with 48 gb ram and the d5 render and ArchiCAD didn’t crash at all .What could be the issue ? and when I’m rendering with path tracing my GPU temp rises to 85 should i use an AIO ?and when i render my fps in d5 render drops to sometimes 1😮‍💨. what parts should i upgrade soon and must be budget friendly since I’m just a student. Also D5 render runs well with NVidia graphics card coz of the ray tracing and path tracing .oh and btw which screen would be best for rendering which resolution. Guys i am a rookie in this pc stuff i just what a nice spec pc for my architecture course ,please nice comments. I’m really looking for a response