Sorry for the below book but note I am responding to 4 different posters' comments.
Man with all this talking i don't know what to do , by the way i decided to , im starting to think a 650w bronze will be enough for me , im, not using premium GPU.
Right now i have a intel 2600k + 6650 xt , but im upgrading next month for am5 + ddr 5 + the new 9000 cpus.
Go by what you expect to have in the next 2 to 3 years. But don't guess. Calculate your needs. How?
The right way to determine the proper size needed is to research all the components, determine their
maximum power demand, add them all up, and that is the
minimum supply you should get. But that takes a lot of time and work. So I recommend using a good PSU calculator and the best and only one I use and recommend is the
eXtreme OuterVision PSU Calculator. This will calculate your minimum needs and recommend a suitable size for those needs.
Plug in all your current or planned new components. Be sure to plan ahead and include all the hardware you think you might add in 2 or 3 years (extra drives, bigger or second video card, more RAM, etc.).
I recommend setting CPU utilization to 100% and Computer Utilization Time to 16 hours per day. These settings will help compensate for component aging, and add a little (but not too much) extra padding to the results. Having a little bigger than you need will typically also result in a little cooler and quieter operation.
Note that no calculator wants to recommend a PSU that is underpowered so they all pad the results, some more than others. The eXtreme OuterVision calculator is and can be the most conservative (which is why I like it best) for 2 main reasons. (1) They have a team of researchers on staff constantly researching components for us to keep their extensive databases accurate and current. And (2), it is the most flexible and has the most extensive databases of available options you can enter. This allows it to factor in all possible components to accurately calculate our needs, rather than guess.
Not knowing most of your current components, I plugged in 2 hard drives, 2 sticks of DDR4, and 3 x 140mm fans. The 6650 is not listed so I used the similar 6600 XT. As seen
here, you currently could easily get by with a decent 500 - 550W supply today. If not sure what you will be getting in the near future, a quality 650W supply will give you plenty of headroom for most future upgrades. Just remember the graphics solution is often the biggest power hog.
there's a certain relation between a PSU's 80plus rating and its quality
Yes, but it is not a given. That is, the 80 PLUS certification program does not have higher standards for various specs depending on the certification level, except for efficiency. As I noted above, there is nothing in the 80 PLUS criteria dictating that Platinum will have better regulation or ripple suppression, as examples, than Gold.
But as I also noted, and to your point, better efficiency tends to need a better design - as in engineering design. But again, that does not mean higher quality caps, coils or construction techniques will be used.
(note: 80plus gold certification does not necessarily automatically mean a given psu's also of good quality. these days you can [without too much cheating] make your gutless wonders hit 80plus gold)
Right, only that applies to all the levels, not just Gold. A little more effort may be required for the higher levels, but as I just noted above, that does not insure the best parts or construction techniques will be used. One area cheaper PSUs may use shortcuts is in the internal heatsinks. A cheap, lower quality Platinum may use a smaller heatsink then couple it with a lower quality, faster spinning and noisier fan.
Cheating is a problem - but those issues can be mitigated by the potential buyer doing their homework before buying. Review sites like TPU will rout out those cheaters by noting where they fail to meet 80 PLUS, ATX and other required criteria.
This doesn't mean they need to upgrade their PSUs as often.
Exactly my point! With proper planning during the initial build/planning phase to ensure one gets a PSU that has the capacity today, with enough headroom for potential upgrades in the future, a good PSU will last well into the future beyond the point the rest of the computer is upgraded due to new technologies.
Again, I am not criticizing the 80 PLUS program. And while admit there are some deficiencies as dirtyferret pointed out
here, the program was never intended to be all inclusive, and does not pretend to be. I will address a couple of his points.
1. As seen
here, specific test equipment is listed. And, as seen
here, testing will be in compliance with,
Annex B of IEEE 1515-2000, IEEE Recommended Practice for Electronic Power Subsystems: Parameter Definitions, Test Conditions, and Test Methods, for guidelines for general test practices and to section 4, Annex B and D of IEC 62301, Ed. 1.0, Measurement of Standby Power, for a discussion on evaluating measurement uncertainty.
By requiring labs to use the same IEEE testing criteria, this [hopefully] ensures all testing is done on a level playing field, regardless the actual test equipment used by that lab.
2. There have been reports of fake/counterfeit logos being printed on supplies and their packaging. Not sure what ChearResult can do about that as they have no jurisdiction or authority in any country to enforce the law. And the resources required to chase those offenders down would be astronomical. The best they can do is list the supplies that have legitimately earned the logo, as they did
here. I note there currently are over 9000 supplies listed!
The bigger problem I see is the cost manufacturers must pay to have their PSUs tested and certified is typically $6,500 for the standard 115V and 230V EU internal ATX supply. That is a lot of money, especially for small companies just starting out.
Oh, BTW, all supplies are tested at 0, 5, 10, 20, 50 and 100% of rated load of the power supply. But the "published" results are for 20, 50 and 100% only (except for Titanium which includes 10% too).
So once again, it boils down to we, the consumer, doing our homework before spending our money.