I’ve made loads of videos on picking the best CPUs, GPUs, and cases, but the PSU is the part that gets overlooked way too often—even though it’s one of the most important components in your whole build. In this video, I walk you through how I pick the best power supply for a PC build in 2026, balancing price, performance, and wattage, while making sure it’s actually compatible with the parts you’re using now (and the upgrades you’ll want later). I break down modularity (non‑modular vs semi‑modular vs fully modular) and why, personally, I much prefer fully modular—especially at 850W and above—because cable management can turn into a horrible rat’s nest fast. Then I go through wattage the right way: using GPU manufacturer recommendations as the main thing to swear by, plus common sense depending on your CPU, workloads, and headroom. I also explain efficiency (80 Plus vs Cybenetics), why Gold is usually plenty, and how the PSU Tier List is a genuinely useful sanity check to avoid buying complete e‑waste. Finally, I cover ATX 3/3.1 and PCIe Gen 5/5.1, why they matter for modern GPUs (especially Nvidia’s 12VHPWR cable situation), and a few “special features” like Corsair Shift side connectors, digital monitoring on high-end units, extra sense pins, and semi‑fanless modes. The goal isn’t to force you into one exact PSU—it’s to give you the tools to confidently choose the right one.