Assemble my PC. My question is a 450 watt power supply for ne RX 570 graphics card and AMD Ryzen 5 2600X 3 illuminated fans
For info I use PC for office but I want to play Minecraft, GTA maybe Red Dead Redemption
Yes, that's enough
Should be enough, you can do the math here: https://www.bequiet.com/de/psucalculator
You can forget the convenient calculator, they only do promos for their own expensive models to sell their expensive products
But you can see how much watt you need. In addition, better a high-quality power supply than a China firecracker.
Is more than sufficient
For your chosen configuration you should choose a power supply with at least 650W, 750W would be better and ideally 800 - 850W.
Why?
Your power supply would be able to fire the PC with 450W, but then runs at very high load near the stop. The higher the load, the lower the efficiency and that means you generate more warm air. Assuming you have a NT with 500W (as gold) and have an efficiency of 90% at 50% load, you have a maximum output of 450W.
At 100% utilization, you are at ~ 87% efficiency and thus have a loss of 65W> 65W that rise in warm air.
Choose your NT so that it is between 50% and 70% utilization, in this area you have a good efficiency and on top of that you have enough reserves upwards. Also do not forget that you can operate a good NT over a few years, so if you have an upgrade of your system in mind, you do not have to buy a new NT again and thus save money.
If you choose at least a 600W Gold NT with this configuration, the NT "only" runs on a load of ~ 70%, which is far better than choosing an NT that oscillates between 90% and 100%.
All of this is not entirely true.
Your power supply would be able to fire the PC with 450W, but then runs at very high load near the stop.
The system is unlikely to exceed 300 watts…
Under no circumstances can a Ryzen 5 and an RX 570 draw more than 400 watts with the rest of the system!
So under 70% utilization, more precisely up to 68%, with a 450 watt power supply!
Assuming you have a NT with 500W (as gold) and have an efficiency of 90% at 50% load, you have a maximum output of 450W.
No, the efficiency relates to the conversion from AC to DC.
A good power supply 500 watts can always deliver 500 watts permanently, even if this is not ideal.
The efficiency of a power supply determines how much watt it takes from the socket. With 87% efficiency at 100% utilization, i.e. 500 watts, 100% are drawn from the socket, i.e. Approx. 575 watts,
and the 75 watts or 13% is lost as thermal energy in the process.
Calculate CPU and GRaka together, then 100-150 W more thin you are well served.
