Hey everyone! I'm about to finalize my new PC build and could really use some input on choosing a power supply unit (PSU). I'm looking for something that's 1200W or higher for a few reasons: I want to hold onto this PSU for several years as I upgrade, and I'm building a setup with an RTX 5090 (FE), a 9950x3d, ROG STRIX X870-E motherboard, three SSDs, nine case fans, a MORA 420 with four 200mm fans, and two D5 pumps.
My case is the Lian Li O11 Dynamic Mini V2, which can fit an ATX PSU that's about 200mm long, maybe slightly more if tested. I've only got a 15A circuit breaker for power, with no other devices running aside from some lights.
I've researched a few candidates for my PSU:
1. Seasonic Prime TX-1600 Noctua Edition ($654)
2. AX1600i ($610) - Currently out of stock
3. NZXT C1500 ($370) - Also out of stock
4. Seasonic Prime TX-1300 ($480)
5. Super Flower Leadex Titanium 1600W ($400)
6. HX1500i ($445)
I'm looking for ATX 3.1 and PCIe 5.1 compatibility, enough wattage to be efficient, and something I can use in my next build in about five years.
If you have any thoughts on these options or other suggestions, I'd really appreciate it! Thanks!
2 Answers
Honestly, between those options, you probably won’t notice much difference. I’ve got the Seasonic 1300W and while it’s nice, I sometimes wish I’d spent less. Just make sure whichever you choose, it fits your needs and is from a trustworthy brand.
You can't really go wrong with any of the PSUs on your list, since they’re all high quality. If you're looking for something else, consider the ASRock Taichi 1300W or even the Super Flower Leadex 2800W. Just keep in mind that your circuit is only 15A, which means it might trip before reaching the PSU's max load. But hey, you'd have all that extra wattage for future upgrades!
Yeah, I get that ASRock was benchmarked well, but I’d steer clear. Their products have had quality issues in the past. For your needs, I think sticking to 1600W or below is a smart bet!

Right? Seasonic does handle efficiency well for the price, but if you're considering something with similar reliability for less, what would you suggest?