On Fri, Mar 04, 2022 at 06:36:35PM +0000, Andrew M.A. Cater wrote: > On Fri, Mar 04, 2022 at 06:47:14PM +0100, Emanuel Berg wrote: > > Alexis Grigoriou wrote: > > > > >> I've heard that for gaming you would want a 600~800W PSU > > >> [1] but how do I know how many W I need for my computer > > >> use? I think the most resource-intense I do would be > > >> compiling and watching multimedia on mpv. [2] > > > > > > Cooler Master has a PSU calculator. > > > https://www.coolermaster.com/power-supply-calculator/ > > > > > > You have to enter CPU, GPU (make and model), HDD, SDD and so > > > on, and it calculates how much wattage is required. > > > Add another 25% as stated above and you're good to go. > > > > Thanks! > > > > I did compute it manually from [1] and the CPU, fans, > > motherboard, RAM and SSD are at most 232W. > > > > CPU AMD mid end (4 cores) 125 > > fans 80 mm (3K RPM) 9 (3*3W = 9W) > > 120 mm (2K RPM) 12 (2*6W = 12W) > > motherboard high end 80 > > RAM ~DDR3 (1.5V) 3 (actually it is a DDR4) > > SSD 2.8 > > > > (+ 125 (* 3 3) (* 2 6) 80 3 2.8) ; 231.8W > > > > The only thing left is the GPU, I take it even in that PSU > > calculator if you input the msi Nvidia Geforce GT 710 it is > > the maximum use (gaming) you get as output. > > > > [1] https://www.buildcomputers.net/power-consumption-of-pc-components.html > > > > -- > > underground experts united > > https://dataswamp.org/~incal > > > > If your draw is a max of 230W and you use a 300W power supply, you've still > got to account for inrush current to capacitors as the machine is switched on. > > A larger PSU in wattage terms may have better capacitors, more capacity to > withstand dips and spikes in mains voltage and may have a better power factor > so be more effective overall. > > the cost differential between 300 and 600W should be relatively small. > > Easier to overspecify: the other thing is that larger PSU wattages may have > quieter / better quality fans. I love almost silent PCs. > > All the very best, as ever, > > Andy Cater >
And to add to that, most recent PSUs are very good in terms of efficiency. They are switched and drag much less power when the computer doesn't demand it. I would also go with a 600 W PSU. -H -- Henning Follmann | hfollm...@itcfollmann.com
