How much watts does my computer need?
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tambeshakunt
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- Jun 5, 2013
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If you aren't going to upgrade further or overclock, a good 300W+ unit is fine.
Let me know if you want suggestions.
Let me know if you want suggestions.
- Nov 17, 2013
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HardcoreNinja
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- Mar 20, 2015
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if you don't plan on overclocking it will take about 200 to 250 watts, i would recommend just getting a good 400w power supply and you should be fine 
- Dec 26, 2012
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Figure roughly 100w for cpu, 100w for mobo + accessories, 75w for pcie slot. If the 750 is one with an external power connection, add another 75w for that.
So you'll need a 300w psu if an unpowered 750, or 350w if a powered one. This is absolute minimums. Recommended wattage for a pc with a 750 is 400w, but this recommendation takes into account inferior psus, so allows for variance in quality.
So you'll need a 300w psu if an unpowered 750, or 350w if a powered one. This is absolute minimums. Recommended wattage for a pc with a 750 is 400w, but this recommendation takes into account inferior psus, so allows for variance in quality.
- Nov 17, 2013
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there's almost no way a mobo alone (excl CPU) pulls 100W. a week ago i had 2 servers idling, a monitor, and a 48port rack switch, all pulling around 250W in total - and that's from the UPS's power cord.
- Dec 26, 2012
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The 750ti is 60-64w period. The connector is capable of 75w. AMD FX Cpus can pull 120w easily. And I did say roughly, not exactly so stop pickin fault. You didn't include hdd, optical drives, fans, led lights, VRM's, audio and all the other crap that's associated with mobo connections.
400w recommended is just that. By experts, by manufacturer. It's kinda funny that by my calculations, you could get by on a 275w psu, except they don't make one, so next size up is 300w.
I know full well that a 77w i5-3570K will not pull 100w at stock speeds, I say 100w for Intel cpu's because that covers any and all headroom, over voltages, crap ass psu outputs yada yada yada, so thank you for correcting my inexactness.
And yes it works exactly like that, thank you very much. You do NOT assign psu size on actual draw, because all systems differ, everything from brand to voltage to line resistances, everything. You plan for maximum need, then figure out what you can reasonably get away with. You also forget that capacitors loose capacitance at a pretty horrific rate, especially in cheaper built units, loosing as much as 10% ability a year. So next year that 300 is just 270,year after its 240... Are you really just going to add up exact wattage used, so thats all you need?.
You have your way, I have mine and mine has worked just fine for over 30+ years of messing around with computers.
400w recommended is just that. By experts, by manufacturer. It's kinda funny that by my calculations, you could get by on a 275w psu, except they don't make one, so next size up is 300w.
I know full well that a 77w i5-3570K will not pull 100w at stock speeds, I say 100w for Intel cpu's because that covers any and all headroom, over voltages, crap ass psu outputs yada yada yada, so thank you for correcting my inexactness.
And yes it works exactly like that, thank you very much. You do NOT assign psu size on actual draw, because all systems differ, everything from brand to voltage to line resistances, everything. You plan for maximum need, then figure out what you can reasonably get away with. You also forget that capacitors loose capacitance at a pretty horrific rate, especially in cheaper built units, loosing as much as 10% ability a year. So next year that 300 is just 270,year after its 240... Are you really just going to add up exact wattage used, so thats all you need?.
You have your way, I have mine and mine has worked just fine for over 30+ years of messing around with computers.
- Dec 26, 2012
- 30,740
- 4,559
- 142,790
Oh, just wanted to add that 'expected wattages' are crap. The expected wattage on the average Intel pc with a r9 290x is somewhere in the neighborhood of 475-500w. Yeah, good luck with that. The 290x is rated at 'expected' wattage of 300w by pcpartpicker.com. In reality, the 290x can and will spike at over 340-360w, just for example, so take that 'estimated' wattage with a grain of salt... Or 3
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