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Is Too Much Power Supply Bad For Your PC???

I am going to build a pc without a graphics card because I am going to wait for the perfect one for me and I will be fine with Intel core i5 4690ks hd 4600. I think my system runs about maybe 100~300 watts, I am going to buy a seasonic x-1250. It's 1250 watts and my question is: will this hurt my pc and will is take/use so much wattage?
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  1. Best answer
    CryingLegend said:
    I am going to build a pc without a graphics card because I am going to wait for the perfect one for me and I will be fine with Intel core i5 4690ks hd 4600. I think my system runs about maybe 100~300 watts, I am going to buy a seasonic x-1250. It's 1250 watts and my question is: will this hurt my pc and will is take/use so much wattage?


    not bad for pc. bad for psu and power bill.

    ive seen videos on youtube and what they say is you should use 60 percent or over of what the wattage output is on the power supply. this is for efficiency reasons. You will only use about 15 percent of that 1250w so it will be very inefficient no matter the efficiency rating. However, 1250w may be a futureproof upgrade to your current pc.

    All im saying is with your current rig you will draw more power out of the wall with a 1250w power supply than say a Antec VP-450.
  2. Nope, there's no problems with being prepared for future wattage. It will only draw as much power from the power supply as needed.
  3. No way, your hardware will only draw as much power as it needs from the psu. If you're only going to be using 300 watts, you're better off buying yourself a 600W powersupply and save money unless you're planning to SLI Titans.

    A 600W powersupply will run all mid-high end SINGLE GPU's just fine.

    However, with 300 watts max being drawn from a PSU designed with a max load of 1250 watts that PSU should last you a very long time... Would be excellent for future proofing, and you chose an excellent CPU.

    But like I said, if you are planning to use a single GPU a 600W PSU will be fine.

    If you are planning to SLI, then all the power to ya bro.
  4. For that PSU you'd be looking at SLI/CF 3x mid range cards or 2x power hungry mid-high end ones.

    Pretty much any current GPU will be fine with an i5-4690K. And a single card will only need a quality 550W PSU or 650W PSU if you want the peace of mind of headroom i.e Seasonic X-650W.

    The PSU itself will only draw the power it needs anyway, so it wont hurt anything being much more than you need. The main downside will be the lower power requirement translating into losing efficiency of the unit, basically it will cost a few pennies more to run.
  5. While overpowering with a larger PSU is not a big concern, overpowering with a 1200+ watt PSU when you only need 600 is absolute overkill. There are very few people who would ever need a psu with that kind of wattage But its your money and perhaps you are getting a screaming deal on it, you have heard the opinions, its your choice now.
  6. blue_smoke said:
    CryingLegend said:
    I am going to build a pc without a graphics card because I am going to wait for the perfect one for me and I will be fine with Intel core i5 4690ks hd 4600. I think my system runs about maybe 100~300 watts, I am going to buy a seasonic x-1250. It's 1250 watts and my question is: will this hurt my pc and will is take/use so much wattage?


    not bad for pc. bad for psu and power bill.

    ive seen videos on youtube and what they say is you should use 60 percent or over of what the wattage output is on the power supply. this is for efficiency reasons. You will only use about 15 percent of that 1250w so it will be very inefficient no matter the efficiency rating. However, 1250w may be a futureproof upgrade to your current pc.

    All im saying is with your current rig you will draw more power out of the wall with a 1250w power supply than say a Antec VP-450.


    lol what? You do realize the PSU draws only what it needs. It's not like if you're only using 300 watts and you've got a 750W PSU that's its then ''running'' at 750watts.

    in any case, why buy a 1250w psu when you'll never need it.
  7. There is no reason to buy more than an 850 W Power supply, unless you are doing tri or quad sli.
    650W PSU will run modern high end graphic cards such as the GTX 780 or R9 290.
    850W will sli.

    The pros = a 1200 W seasonic will power pretty much anything you want to put in your CPU (including small household appliances).

    The cons = as someone else mentioned, power supplies run optimally around 80% load. Running less load is less efficient, but I'm guessing for someone who is willing to spend over 200$ on a power supply a few pennies of electricity monthly is not going to be the end of the world for you.

    But back to your original question no it won't hurt your PC, and I expect it will waste a few pennies a month in electricity compared to a 650W platinum rated unit running at optimal effeciency.
  8. your psu does draw more power than it needs if you are not using it for its intended purpose.

    a pentium g3220 build with no videocard, a 120gb ssd and no optical drive with 4gb of 1.35v ram will draw maybe 100w from the power supply.

    A 1200w power supply would show probably 150w at the wall. This is because of the efficiency hit that you're taking when you are only drawing 10 percent of its certified power.

    Study up on the efficiency of power supplies. There are many videos about it on youtube by professional people.
  9. You lose 3.5% efficiency at a load of 300 watts which is not a lot at all, it still runs at 88.92% efficiency... http://www.hardocp.com/article/2012/11/13/seasonic_x1250_1250w_power_supply_review/4#.U83FHfl_tCg
  10. Where's the chart where you are only drawing 100W?
  11. Don't think that's exactly relevant, as he won't be using 100 watts but there it is here: http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=309 It goes down to 85% efficiency.
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