You can use this PSU tools to calculate your PC build.

You'd better to get a 750W PSU for this combo. Take a look at top recommendations:

[amazon bestseller="750w psu" items="5" template="table"]

Honestly, before giving a final number, are you planning on doing any heavy overclocking or running a massive amount of storage/fans? That can really change the math depending on your total draw. While 750W is technically enough for most, I've always been a reliability-first kind of guy. You're putting high-end hardware like the 9800X3D and a 9070 in there, so you *never* want to cheap out on the heart of the system. I usually suggest going with a high-quality 850W unit like the Corsair RM850x or maybe the Seasonic Focus GX-850. Basically, having that extra headroom means your fan wont have to spin as hard, which keeps things quiet, and it handles those weird micro-spikes in power (transients) way better. If youre PSU is constantly pushed to its limit, it can degrade faster over time or cause stability issues during heavy gaming sessions. Plus, with newer components, getting something ATX 3.0 ready is just smarter for long-term safety. Better to have the extra capacity and not need it than to deal with random shutdowns later on, I think?