Perhaps the highest quality power supply at 550 watts at a reasonable price, with a 10-year warranty, silent, from a company whose name has become synonymous with quality in power supplies and generally comfortably covers most mid-range systems that have a CPU and GPU consumption that does not exceed 300 watts (which is not low).

For example:

Ryzen 5 3600 / GTX1660 Super ---> 190 watts OK (with overclocking capability)

Ryzen 5 5600X / RTX3070 ---> 285 watts OK (with overclocking capability)

Ryzen 9 5900X / RTX 3070 ---> 315 watts OK (the upper limit that the 550 watts can safely cover, only for stock settings without overclocking*)

Intel i9 10900K / RTX 3070 ---> 350 watts (Here, you would need 650 watts, and if I were to add an RTX3080/3090, I would go for 750 watts, and if I also overclocked, I would choose 850 watts*)

(*When overclocking, you must exclude the possibility of insufficient power, which is why you always calculate that the processor will consume twice the power of its rated power by the manufacturer, and in practice, it may burn less - however, there must be a margin because if the system requires more power at any given moment and it doesn't have it, it will crash)

80 euros for an 80 PLUS GOLD, FULLY MODULAR power supply from SEASONIC, with Hybrid FAN mode, which is recommended for gaming and comes with a 10-YEAR warranty, and in Newegg reviews, it receives 5 stars... it can only be an insane value for money and at the same time, a very high-quality power supply.

P.S. If 70-80 euros seem too much for the power supply, check out the corsair TX550M, which is currently at an excellent price (around 50 euros), and it has a 7-year warranty. Personally, I have been using it in 2 gaming systems for 4 years, and it is high-quality, silent, and very stable in its operation.

The Seasonic Focus GX is a very good fully modular power supply at an affordable price. Overall, its body and cables are of high quality in a simple black color that matches with any color scheme. It doesn't have any crazy design, it's very simple and won't bother those who want something straightforward.

Generally, Seasonic is a well-known company that you don't need to be afraid of. Imagine that even Corsair and other companies buy power supplies from Seasonic and sell them under their own name and logo. So you may already have some experience with Seasonic without even knowing it.

It works comfortably with a Ryzen 5 3600 and GTX 1070ti at 550w and is quiet. Don't rush to get a 750w power supply because you think the wattage won't be enough. It's possible that if I had an Intel, it would require fewer watts to operate. Also, as a tip, never skimp on buying a power supply and then add something like an RTX 2060, etc. Get something good that will keep you calm and have peace of mind. The power supply is the most important component as it is the heart of the computer.

Finally, don't look at the 80plus certification as a measure of quality. There are plenty of Gold models that are not as high quality. It simply changes the efficiency of the power supply in how it uses the power it receives from the wall and how much of it. So Gold certification, etc. doesn't always equal quality. Look for the model you are interested in to make sure it doesn't have any issues and see what people say about it.

Otherwise, I haven't had any problems with it in the 4 months I've had it, neither with temperatures nor with computer crashes, etc. Imagine that with the previous Corsair VS 650 purchased in 2015, I had some issues, so spend those extra 30 euros to get something good that will protect your computer from power surges, etc. It's an investment in the power supply, as we will have it for many years.

I recommend it, solely because it's modular, it frees up your hands with the cables and makes it easier.