yo! picking a PSU is lowkey the scariest part of a first build cuz of all the horror stories. basically, the power supply takes the "dirty" AC electricity from your wall and converts it into stable DC power for your parts. if the internal components are cheap, they cant handle heat or voltage spikes well, and thats when things go boom... so spending a bit more is literally like buying insurance for your 3060. i'm still kinda new to this but i was in the same boat last month and i'm really happy with my choice. for under $75, i'd highkey suggest the Corsair CX650M 650 Watt 80 Plus Bronze Semi-Modular ATX Power Supply. it's usually around $69 and super quiet. i also looked at the EVGA 650 B5, 80 Plus Bronze 650W, Fully Modular which i've seen for $75 on sale if you want better cable management. anyway, i've had zero complaints with my corsair unit, it works well and was easy to install. hope that helps ur build!!

Late to the party but honestly, I totally get the anxiety... picking a PSU is highkey the most stressful part because it's the only component that can literally take everything else down with it if it fails. Since you're running a 3060 and a 5600, you don't need a massive 850W unit, but you definitely want something with decent DC-to-DC topology and modern safety protections. For your situation, here's what I recommend to keep things safe and under that $75 mark: * Corsair CX650 650 Watt 80 Plus Bronze ATX Power Supply - This is basically the go-to for budget builds. It has a decent fan and reliable protections like OVP (Over Voltage Protection) and SCP (Short Circuit Protection).
* ADATA XPG Pylon 650W 80 Plus Bronze Power Supply - Ngl, this is a sleeper hit. It’s actually rated pretty well on common PSU Tier lists, making it super dependable for mid-range setups like yours.
* Cooler Master MWE Gold 650 V2 650W 80 Plus Gold - Sometimes this drops near $75 on sale, and it's a significant step up in efficiency if you can find a good deal. Basically, just make sure you avoid those generic "no-name" units that weigh next to nothing. If a deal looks too good to be true for a 650W unit, it probably is... and your RTX 3060 deserves better than a fire hazard!! Be careful with older group-regulated designs... definitely stay with something modern. gl!

Curious about one thing: are you thinking about upgrading ur GPU anytime soon, or is the 3060 gonna be ur main card for a few years?? ngl, it's super important to know because that determines how much "headroom" you actually need for the future. I'm kinda cautious about budget units myself cuz I've seen some scary stories online... basically, you gotta make sure it has decent protection features so it doesn't take out your whole motherboard if something goes wrong. * Look into the Corsair CX650 650 Watt 80 Plus Bronze ATX Power Supply for a solid, reliable budget pick.
* The Thermaltake Toughpower GX2 600W 80+ Gold SLI/Crossfire Ready Continuous Power Supply is also highkey a great value if you want Gold efficiency under $75. I mean, I'm still learning too, but I would suggest checking the PSU Tier List before buying anything. Better safe than sorry!! gl with the build, it sounds like a sweet setup. peace