4745454b :
First, watts isn't the end all thing you need to worry about. Build quality is just as important. You need to make sure you buy a QUALITY PSU, not just any 400W PSU.
https://www.amd.com/en/products/apu/amd-ryzen-5-2400g
The 2400G has a power draw of 65W. I usually budget another 50W for everything else. So maxed out you should be looking at 100W+. This isn't very much. A quality 300 or 350W PSU can handle that. It's generally "best" to get a 450W however. Those are usually really easy to find cheaply and of a good quality. They will also handle GPU upgrades for when you finally buy one. This is massive overkill, but at $50 there is little reason to buy anything else.
https://pcpartpicker.com/product/KmgzK8/seasonic-focus-gold-550w-80-gold-certified-semi-modular-atx-power-supply-ssr-550fm
My specifications is:
AMD Ryzen 5 2400G
ASRock B450M-HDV
PVLR416G300C5K - 2x 8Gb 3000
Western Digital WD Blue Desktop 2 TB (WD20EZRZ) -2x
SSD Samsung MZ-N6E250BW
Wi-Fi board
2xUSB3.0
I read some FAQ'.s. If I get it right and did right calculations, then my data is :
LGA115x from i5 / i7-2xxx to i5 / i7-7xxx (including options with free multiplier and engineers), LGA771 / 775, AMD Phenom II or newer - with TDP up to 95 W inclusive, Ryzen 1700/1600 / 1500X / 1400 / 2x00G , overclocking (ITS self-collecting)
Integrated videocard
>>>290-300 Wt
2 HDD Western Digital WD Blue Desktop 2 TB (WD20EZRZ)
>>>4-6 Wt (x2)
SSD
>>>7-9 Wt
Wifi card
>>>10 Wt
Cooler
>>> 2.5 Wt Wt
RAM
>>>1-3 Wt (x2)
USB devices
>>> 4.5 Wt (x2)
Total summ: 348.5 Wt
In some forums I was I've got advice on PSU for 430 Wt. For this module: Sea Sonic Electronics S12II-430 (SS-430GB Active PFC 430W (https://www.newegg.com/Product/Product.aspx?Item=9SIA4CP1GF9465&Description=S12II-430&cm_re=S12II-430-_-9SIA4CP1GF9465-_-Product).
This PSU have analogue from the same brand is Sea Sonic Electronics ECO 430W. It cost some dollars more, but I didnt got whats the difference between them.
I do not plan to overclock my system, also I rare playing games.
At some different tech forums I've got different recommendations of PSU voltage. Some adviced me 430, some 400, some 450 or even 500.
My question is, is 350 Wt for me is enough? Do I need to look for PSU 400 Wt, 430 Wt or 450 Wt? What's the best options for voltage do I need?
I need from PSU just stable and reliable long work, but I don't to buy PSU's with voltage more than I need for purposes.