Will 650 W be enough?

[kitkat9933]

Just purchased a 650w gold rated PSU.

Will be running

• 3900XT
• 64GB 3600MHZ RGB RAM
  
• 280mm AIO Cooler
• x570 Board
• PCIE4.0 1TB Drive.
• A few case fans.
• 5700XT

I am looking at moving to a 3090. Do you think a 650w will be enough? Or should I return and get a 750w?

 

[Lemin]

The new NVIDIA GeForce RTX 3090 graphics card, and any other Ampere card using the new 12-pin PCIe adapter, requires an 850W PSU.
adapter turns 2 x existing 8-pin PCIe power connectors into a single 12-pin PCIe power connector.

 

[kitkat9933]

Ok thanks, I switched to 850 to be safe!

 

[LtMatt]

Just purchased a 650w gold rated PSU.

Will be running

• 3900XT
• 64GB 3600MHZ RGB RAM
  
• 280mm AIO Cooler
• x570 Board
• PCIE4.0 1TB Drive.
• A few case fans.
• 5700XT

I am looking at moving to a 3090. Do you think a 650w will be enough? Or should I return and get a 750w?

650W is more than enough, using the same setup but with a 3950X highest I’ve seen under heavy gaming load is 400W peak, and it’s mostly closer to 300W.

 

[alec]

The new NVIDIA GeForce RTX 3090 graphics card, and any other Ampere card using the new 12-pin PCIe adapter, requires an 850W PSU

Where does this come from? If as you say, 2x 8pin is converted to 12 pin, this can't be more than 2x150W
Add 75W from motherboard, which I doubt they use, 375W ceiling.

Nothing needs 850W short of 10900K with SLI/crossfire (is this still a thing?)

 

[kitkat9933]

I went for an RM850X just in case

 

[djkav]

I have an RM750, which will be powering a,
3700x,
ROG x570 Crossfire Hero WiFi
H115i Pro,
4x 140mm ML Fans
2x 16gb 3600mhz CAS 16 - 1.35v,
2x NVMe PCIe 3 - 1 & 2tb,
6x SSDs,
2x 4gb+ HDD

Will be getting a gtx 3090.