i9 10900k is ~220-240W CPU, plus ~250-300W for that GPU and some 50-100W extra for other components. 650W PSU would be enough if OP doesn't plan to OC, and even if they do but this is exclusively gaming PC - it's still enough as power draw in games would be way lower.It's "enough", but on the knifes edge. 750 is perferable.
a machine that can use up to 640 watts (with your calculation that is)i9 10900k is ~220-240W CPU, plus ~250-300W for that GPU and some 50-100W extra for other components. 650W PSU would be enough if OP doesn't plan to OC, and even if they do but this is exclusively gaming PC - it's still enough as power draw in games would be way lower.
Speaking of Antec EAG Pro, it's decent PSU per se, but it has a sleeve bearing fan, it's good only if it costs maybe 10$ more than smth like Corsair CX, bq! Pure Power 11, Antec Neo Eco Zen Gold.
Why ? Because good PSUs aren't rated for full continuous power output at 40-50°C ambient ? Oh, wait, they are ... why then ? And that not to mention that high-end PSUs are overbuild at least for 25-30%, hence OPP trips in this range, although it's mostly to accomodate for GPUs with high transient load spikes, it's obviously not recommended to overload a PSU, even high-end one. Running a PSU at 100% load assuming it's rated for continuous power is how it's supposed be used as. Most PSUs would be loud at 70%+ load tho but not all and either way, it's not 'on knife's edge', as in it's going to fail or explode, it's just loud.a machine that can use up to 640 watts (with your calculation that is)
should not have a 650 watt power supply.
700 is a minimum, and i would personally put a 750.
What i meant by knife's edge, is not knife's edge of stability, is knife's edge of what that psu can handle.Why ? Because good PSUs aren't rated for full continuous power output at 40-50°C ambient ? Oh, wait, they are ... why then ? And that not to mention that high-end PSUs are overbuild at least for 25-30%, hence OPP trips in this range, although it's mostly to accomodate for GPUs with high transient load spikes, it's obviously not recommended to overload a PSU, even high-end one. Running a PSU at 100% load assuming it's rated for continuous power is how it's supposed be used as. Most PSUs would be loud at 70%+ load tho but not all and either way, it's not 'on knife's edge', as in it's going to fail or explode, it's just loud.
And i've already included that as first, these are maximal numbers in stress tests and second, 100W for 'other components' is very generous, you're not going to see even 50W often in modern systems unless you have a duckload of HDDs or RGB fans.Its best practice to have atleast 50 watts more than your machine would need.