Question Suggestions for How Much Power My PSU Has to Have

[AnimalisticDisskord]

How much power do I need to run this system?

1. AMD Ryzen 7 9800X3D
2. Asus TUF Gaming B850-Plus WiFi Bundle
3. G.Skill Trident Z5 Neo RGB DDR5-6000 2 x 16
4. Samsung 990 NVMe 2T SSD
5. RTX 4070ti
6. Arctic Liquid Freezer III 360 A-RGB - CPU AIO

 

[Eximo]

750 -850 quality PSU. You will find the market is a bit oversold, so some decent 1000W units may be available for not much more.

 

[thx1138v2]

DIY calculator:
https://www.newegg.com/tools/power-supply-calculator

 

[Eximo]

Well that comes up with 600-699, but doesn't account for fans, pumps, etc. Not a bad estimate, but you generally want to keep the PSU at around a 50 - 80% load, so a 750W easily fills that requirement. PSUs also age over time and can deliver less than their ratings as the years go on.

Other calculators similarly leave off fans, pumps, and also over estimate power requirements for things like memory and motherboards.

Mind that is 100% CPU and GPU usage. You generally won't experience that outside of benchmarking.
GPUs can easily pull 100% of their rating though, and more on occasion.

 

[geofelt]

Your first concern is to buy a quality psu. A 7 year warranty or better
is usually good quality.
Graphics cards can have some very high power demand spikes well above the nominal draw.
The 750-850w might be right, but 950w will allow the psu to loaf and be quieter, running in the middle third of it's range.

 

[AnimalisticDisskord]

Thank you for all of the suggestions!