Best PSU for RTX 4090 and i9-14900K build?

Question

Honestly im just so fed up with this build right now. I spent a fortune on this RTX 4090 and the i9-14900k and I thought my old 850w unit could handle it but it keeps clicking and just shutting down completely whenever I try to render anything in Octane or even just playing Cyberpunk for more than twenty minutes. It is honestly terrifying hearing that click and the whole screen going black. I am so anxious that its gonna fry my components which literally cost me my entire savings for the year. I need a new PSU like yesterday because I have a big deadline for a freelance gig next Friday and I cant even keep the pc stable for an hour right now. I tried undervolting the cpu but it didnt help and honestly I shouldnt have to gimp my performance just to keep the thing running.

I am looking for something that is actually reliable and wont make me feel like my house is gonna catch fire. Here are the things I need:

at least 1200w or maybe 1500w just to be safe because the 14900k is a literal space heater when it boosts

must have the native 12VHPWR cable because I hate using those stupid 4-to-1 adapters they look like a fire hazard and take up way too much room in my case

quiet fan profile because I work in a small studio apartment and the fan noise is driving me crazy

budget is around $350 but I can go up to $400 if it means I can finally sleep at night without worrying about my pc dying

I was looking at some Seasonic or Corsair units but there are so many different models and I keep reading about coil whine issues on the newer units and it is just making me more stressed out. I live in Ohio near a Microcenter so I can go pick something up tomorrow morning if I can just get a solid recommendation that people actually trust. What are you guys using for these high end builds that doesnt crash during transient spikes? Is ATX 3.0 actually mandatory now or can I get away with an older titanium rated unit? Just really need some peace of mind before I lose my mind...

pdsulqznnn · Accepted Answer

man i feel your pain. trying to run a 14900k and a 4090 on an 850w unit is basically like trying to tow a trailer with a moped... it just isnt gonna end well. unfortunately some of the newer high end units have been a bit of a letdown lately too. i had some major coil whine issues with a recent seasonic build that drove me nuts and honestly some of the newer corsair shift models are awkward to cable manage in smaller cases. since you are near a microcenter you should definitely look at these:

MSI MEG Ai1300P PCIE5 1300W 80+ Platinum - honestly this is my top pick. i use it in my main workstation and it handles those weird 4090 power spikes without even blinking. plus the digital monitoring is actually useful for once.

Corsair HX1500i 1500W 80+ Platinum - if you want total overkill for peace of mind this is the one. just make sure the box says it includes the native 12vhpwr cable because some older stock is still floating around.

Seasonic VERTEX GX-1200 1200W 80+ Gold - its decent but i have heard some minor clicking on these too lately so keep your receipt. definitely go for atx 3.0. the native cable is way safer than those messy adapters and the standard is literally built to handle the transients that are killing your setup. get one of these and you can actually finish your project without having a heart attack every time you hit render...

unstedtdsm · Answer

I love my Seasonic PRIME TX-1300 ATX 3.0 Titanium! It fixed my transient crashes instantly tbh.

Seasonic: Best ripple suppression

Corsair HX1500i 1500W Platinum ATX 3.0: Fantastic digital sensors and silent operation.

SQLSheriff · Answer

Basically you just need a really beefy unit that supports the new standards so you can stop using those adapters and fix the crashing. I got a high wattage gold rated one recently and it totally stopped the shutdowns during heavy loads. Honestly those power spikes are scary and I was worried about my apartment's old wiring too when it started happening to me. It actually reminds me of my first place in Dayton where the lights would dim every time the AC kicked in. I spent like a month trying to figure out why my computer kept rebooting and it turned out the outlet I was using was shared with the refrigerator in the kitchen. I had to run this massive heavy-duty extension cord across the hallway just to get a stable connection for my work setup. My roommate at the time was always tripping over it and we ended up having this huge argument about cable management that lasted for weeks. I think we eventually just taped it to the ceiling with duct tape which looked absolutely terrible but it worked for the rest of the lease. I miss that place sometimes though because it was right next to a really good taco truck that stayed open until 3am and they had the best carnitas. Anyway lol sorry I kinda went off on a tangent there but just make sure your house can actually push that much power through the wall safely.