Im new at building a PC. actually this will be my first time building. the 750W is on sale. is it bad for the PC?
Efficiency will be slightly less with the larger power supply, but not enough to worry about. The 260w draw is plenty to keep the larger supply loaded and stable.
For the extra $3 I'd get the larger supply. Main reason is that next year you might decide you want a better GPU, and your power draw jumps to 400W. A 500W PSU is pushing your luck, but a 750 will be fine.
BUT, make sure the supply is a good brand name one. It's easy for a dodgy company to put a sticker on a cheap power supply. You could buy a ~400W supply with a 750W sticker on it, and not even know you had a problem because it's powers your 300W PC just fine.
It doesn't hurt to get an extra large power supply to be ready for future upgrades.
Larger ones are less efficient, which means it'll take a tiny bit more power to run.
But one thing that would worry me is the quality of these power supplies. They make some pretty terrible power supplies out there. So as long as they have some good reviews, I'd rather have extra wattage in case I upgrade later.
But I also like to have around Gold certified power supplies, they pay for the extra price in power savings.
I would tend to ignore the absolute value partpicker gives, sensibly you have chosen 500W or 750W. The PC only draws as much power as it needs so you cannot have a "too powerful PSU". That said it is better to have a less powerfull quality branded PSU rather than a more powerful cheap little known brand. The PSU is at the heart of the system, cheap brands don't give the rated output for any sustained periods, when they fail they can take the rest of the board with them. Look for a quality brand EVGA, corsair, coolermaster, Antec, enermax, bequiet!, for a single graphic card system a PSU of 500-600W would be plenty
Here is a link to partpicker
40$ for a 750W PSU is a little low.
It depends on the company. The 750W might be some noname one. When looking at PSU s, go for EVGA or Seasonic. Corsair is also decent, however, I ve heard a lot of bad stuff about their CX series PSU s.
David is correct. Plus, there is no "good" PSU for $40 that is a proper 750W PSU…. It must be a cheap off-shore clone PSU.