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Power supply help

Hi,

I am putting together my very first build and want some advise on which power supply and of what wattage to buy.

My components are:

CPU: i5-4670
Motherboard: MSI z87-g45
Graphics car: PowerColor RADEON HD 7870 OC, 2048 MB DDR5, Mini-DP, UEFI
RAM: Crucial Ballistix Tactical Series DDR3-1600, CL8 - 8GB Kit
Optical Drive: Samsung SH-118AB/BEWE
SSD: Kingston HyperX 3K SH103S3/120G
HDD: Seagate Barracuda 7200 2TB, SATA 6Gb/s

and of course the usual peripherals and monitor!

Do you think that a 650 W PSU would suffice? I am asking because the graphics card requires a 500 W of power minimum according to the manual, and the cpu should suck up 84 W of power. That would then leave around 66W of power for the rest of components? Do you think this will bottleneck the performance from the other components? Also, I want to preferably keep the price under £80.

Here are a few options I am considering. Any suggestion would be most appreciated.

http://www.overclockers.co.uk/showproduct.php?prodid=CA-037-CS&groupid=701&catid=123&subcat=2597
http://www.overclockers.co.uk/showproduct.php?prodid=CA-003-XF
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182071

Looking at the components, how would you expect the computer to perform?


Thank you.
14 answers Last reply Best Answer
More about power supply
  1. Yeah 650W will be far enough for this build. Both the Corsair & the XFX are good.
  2. Best answer
    go with witch ever you like corsair or xfx both will be fine and you will be able to upgrade to a better card if you want in the future.your system doesn't require more that 450 watt .your gpu requires max 170 watt because it is oc'd 130 watt non oc
  3. Hi,

    As for your computer, it looks very good and your performance should be excellent.

    For the power supply, according to your calculations, I think it will be safer to go for a 750W PSU, to allow enough room for upgrades in the future. Also, it is better to have too much than too little, there is no risk in having a higher wattage psu. How about one of the following??

    1) http://www.amazon.co.uk/Corsair-CX750-Builder-Series-Bronze/dp/B008RJZR40/ref=sr_1_1?ie=UTF8&qid=1382274966&sr=8-1&keywords=700w+psu

    2) http://www.amazon.co.uk/XFX-P1-750S-NLB9-PRO750W-Edition-Supply/dp/B0045L4BJ6/ref=sr_1_1?ie=UTF8&qid=1382275008&sr=8-1&keywords=xfx+750w

    3)http://www.amazon.co.uk/Fractal-Design-Integra-Power-Supply/dp/B00931YW60/ref=sr_1_15?ie=UTF8&qid=1382275020&sr=8-15&keywords=750w+psu

    hope this helps!
  4. A CX650 would be enough but if you will be overclocking or crossfiring later it may be best to get a CX750M
  5. So put all the answers together. If u want a second gpu in the future, got with a 750W.
    For this build a 650W is far more than enough.
    Forget about Corsair CX series & Fractal Design...Stay with Corsair AX,TX,VX,HX..XFX psus, and Seasonic ones.

    Have fun!!
  6. Ectorr said:
    So put all the answers together. If u want a second gpu in the future, got with a 750W.
    For this build a 650W is far more than enough.
    Forget about Corsair CX series & Fractal Design...Stay with Corsair AX,TX,VX,HX..XFX psus, and Seasonic ones.

    Have fun!!


    A HX650 or HX750 would be a really good choice I just wasn't sure about the budget
  7. kammak743 said:
    Ectorr said:
    So put all the answers together. If u want a second gpu in the future, got with a 750W.
    For this build a 650W is far more than enough.
    Forget about Corsair CX series & Fractal Design...Stay with Corsair AX,TX,VX,HX..XFX psus, and Seasonic ones.

    Have fun!!


    A HX650 or HX750 would be a really good choice I just wasn't sure about the budget



    Although the tx,hx, gs are all very good, I think they might be a bit to expensive tl squeeze into £80. Therefore I recommend the cx series. ... there is nothing wrong with them and they are great powersupplies. I myself have a cx600 and I am very happy with it. Therefore I think you can go for the cx because it will fit your requirements anf budgets.

    hope this helps!
  8. Sorry I didn't notice the £80 price point.
    The cx750M or CX650 would be good then.
    They are very good PSU's , I have one in my system after my old psu died and it is a great improvement.
  9. Sorry, but 12pounds makes no sense when its about PSU.
  10. Ectorr said:
    Sorry, but 12pounds makes no sense when its about PSU.


    It is actually about £30
  11. kammak743 said:
    Ectorr said:
    Sorry, but 12pounds makes no sense when its about PSU.


    It is actually about £30


    Yep I thought above the £80, okay dont response for this. Why spend a lot of money on a build, and save on a psu.. which can kill ur entire system..I'll never understand this. Peace
  12. CX series from corsair is not the best option from corsair, I recommend to you HX750W or AX series if you can afford it, XFX are really good PSU too, all of them use SEASONIC topologies wich is one of the best brands from all times(the best for me). Antec would be a good option too.
    Remember the PSU is like a heart(is one of the most important part of a PC) all your hardware life depends on the PSU, so you must put all the money you can on that part
  13. Thank you all for your quick answers, it's much appreciated. I think I will go for the 650 W psu unless I can find the 750 W one at a reasonable price. I will think of which brand to buy, but maybe the xfx psu. Thanks all again.
  14. no prob... ur welcome


    (PS. make sure to choose the best answer so that it closes the question and benefits others with similar questions. thanks! )
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