I just tried this PSU tools, they suggest me to get a 750W PSU.

Honestly, I’ve spent way too much time lately digging into the OEM side of things because brand labels can be *super* misleading. In my experience, even top-tier brands swap between CWT, Seasonic, or FSP internals depending on the specific line, which totally changes the ripple suppression and transient response. I remember my last high-draw build—I initially went with a unit that looked fine on paper, but it kept tripping OCP because it couldn't handle the micro-spikes from the high-end silicon. Before looking at the current market offerings, what’s ur actual workload gonna be? Like, strictly gaming or are u doing heavy multi-core rendering that'll keep that 9950X3D pinned? Also, r u looking specifically for an ATX 3.0/3.1 unit with the native 12V-2x6 header? Knowing that makes a huge difference in which tier of hardware actually makes sense, tbh.

750W PSU is recommended.

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

Thermaltake GF1 is OK.  https://www.amazon.com/Thermaltake-Fully-Modular-Power-Supply/dp/B0CKY88GMT?------123456890?7649-20&th=1