[SOLVED] Is this PSU good enough for i9 12900k and RTX 3080 Ti?

[jasonmason]

Beforehand, sorry if this question gets on your nerves i got bare experience in computer building world.

Will this PSU Corsair RMx White Series RM850x 850W 80 Plus Gold Full Modular suffice my rig? Or should i aim for some more wattage?

And will the CPU Cooler fit my Motherboard with no issues? I know i need the LGA1700 Retrofit Kit for the cooler but my another concern is the compability of the cooler with the Motherboard.

Planned components: (Haven't bought them yet)

Motherboard: ASUS Rog Strix z690-E Gaming Wifi
RAM: G.Skill Trident Z5 RGB Silver DDR5 6000MHz 32 GB 2x16GB CL36
CPU: i9 12900k
GPU: Asus ROG Strix GeForce RTX 3080 Ti OC Edition 12GB GDDR6X
Storage: Seagate FireCuda 530 SSD 1TB M.2 NVMe 3D TLC (For Games)
Storage: Samsung 980 Pro SSD 250GB PCIe NVMe M.2 (For OS)
CPU Cooler: iCUE H150i ELITE CAPELLIX Liquid CPU Cooler — White
Case: Corsair 5000x RGB — White
Fans: 7x Corsair RGB Fans

THANK YOU!

 

[g-unit1111]

That's an excellent supply - you can't really go wrong with the RMx series. I have the RM750X (and the other rig has the 850W HXi) in one of my rigs and it's been a great supply so far.

 

[jasonmason]

That's an excellent supply - you can't really go wrong with the RMx series. I have the RM750X (and the other rig has the 850W HXi) in one of my rigs and it's been a great supply so far.

Glad to read that.

So, to conclude this, I won't experience no sudden computer shut offs with this PSU? Given the fact that the RTX 3080 Ti is power hungry machine and also i'll be running 7+ RGB fans at the same time. (3 front fans, 1 exhaust fan in the back, and 3 radiator fans on top). + Planning on doing some Overclocking in some future once i feel comfortable with the rig and its mainly gonna be for 4k 144hz gaming so i hope the 850w PSU won't limit me in those senses, right?

 

[g-unit1111]

Glad to read that.

So, to conclude this, I won't experience no sudden computer shut offs with this PSU? Given the fact that the RTX 3080 Ti is power hungry machine and also i'll be running 7+ RGB fans at the same time. (3 front fans, 1 exhaust fan in the back, and 3 radiator fans on top). + Planning on doing some Overclocking in some future once i feel comfortable with the rig and its mainly gonna be for 4k 144hz gaming so i hope the 850w PSU won't limit me in those senses, right?

I haven't had any problems with either the RMx or the HMx. I don't really do a whole lot of advanced overclocking (mostly basic stuff) on either machine so I can't say how they would fare once you start overclocking. But they are both pretty solid units and should last a long time.

 

[Karadjgne]

You should only be hitting @ 700-750w at most, normal range being closer to 600w, so the 850w should be plenty, even with the draw of that monster cpu. If the pc sees long hours of use, might want to consider the HXi instead, the Platinum rating on efficiency can add up over time, especially with that amount of regular power draw.

 

[jasonmason]

You should only be hitting @ 700-750w at most, normal range being closer to 600w, so the 850w should be plenty, even with the draw of that monster cpu. If the pc sees long hours of use, might want to consider the HXi instead, the Platinum rating on efficiency can add up over time, especially with that amount of regular power draw.

Alright, and how would the RMx 850w handle overclocking? Im more into the RMx 850w because it has a white variant since i want my build to be white-themed, i did some research about the HXi you mentioned above and it only sells its black version, as far as i know.

And would it be so bad if the pc sees long hours of use with the RMx 850w? Obviously won't torture it 12 hours daily.

 

[Eximo]

My 3080Ti runs at 350W, my i9-10900F will pull about 130-150W under a benchmark depending on voltage settings, I have 7 140mm non RGB fans, and full liquid cooling. All happily running off an RM850x, the older version.

12900k run up to about 150W as well, 200W if you overclock (not really necessary), so you would be looking at around 600-700W under a full load. Full load scenarios aren't super common on the CPU.

The reason you need large PSUs for the 30 series is power spikes, not necessarily power consumption, but you will end up using every single PCIe/EPS port on the CPU. If you have anything that needs a supplemental PCIe connector, you should look at a 1000W.

 

[jasonmason]

My 3080Ti runs at 350W, my i9-10900F will pull about 130-150W under a benchmark depending on voltage settings, I have 7 140mm non RGB fans, and full liquid cooling. All happily running off an RM850x, the older version.

12900k run up to about 150W as well, 200W if you overclock (not really necessary), so you would be looking at around 600-700W under a full load. Full load scenarios aren't super common on the CPU.

The reason you need large PSUs for the 30 series is power spikes, not necessarily power consumption, but you will end up using every single PCIe/EPS port on the CPU. If you have anything that needs a supplemental PCIe connector, you should look at a 1000W.

Yeah, i thought about betting on 1000w PSU to be on a safer side and future-proofing. Have you got any suggestions which one should i go for? Preferably a white variant Power Supply for aesthetics and a reliable one.

 

[Karadjgne]

Corsair has a 1000w RMi in white, it's rated basically the same as the RMx, but has digital outputs so iCue software can actually read the various voltages, change fan curves etc at the psu, not just the motherboard.

There's also the SuperFlower Leadex V (Platinum, Pro) that's white in 1000w.

The difference between Gold and Platinum is efficiency. The higher the efficiency, the less power pulled from the wall and wasted as heat. You'll be pulling 600w+ with heavy use, constantly for several hours. That adds up. 1 hour with your pc is like leaving a hairdryer running for 20-30 minutes. Lower wasted heat also means the fan isn't going to be at higher rpm, therefore quieter.

I have a Platinum 600w Corsair SFX pushing a 3700x and 2070Super in a full custom loop. The psu fan only spins during pc startup/reset, it's efficient enough that there's not enough heat generated to require anything more than passive cooling.