PSU Help, Thanks!

So I am starting to build my new computer I already have the motherboard, cpu, and ram. I put my specs into a psu calculator and it said my system would run at about 420 watts that's with the cpu overclocked. I dont really want a 500 watt psu, because I might crossfire the gpu one day, so I would need a 600 watt psu.

Here is the spec so you know

Motherboard: Gigabyte GA-Z77X-D3H
CPU: i5 3570k
Ram: Patriot (2x4gb) DDR3 1600mhz
GPU: Sapphire 7870 2gb DDR5

Extras:
1 7200rpm HHD
2 120mm Fans
No DVD-tray (I have an external one that FLYS really fast)

No liquid cooling yet, but I did put that into the calculator because I do plan on getting one in the next few months


I want to try to keep the psu under $50, I know that's hard but I have seen a few

What I am considering:

Coolmax Power Supply ATX 600 http://www.newegg.com/Product/Product.aspx?Item=N82E16817159079

Its cheap and is 80 PLUS Certified
11 answers Last reply
More about help thanks
  1. yamahahornist said:
    So I am starting to build my new computer I already have the motherboard, cpu, and ram. I put my specs into a psu calculator and it said my system would run at about 420 watts that's with the cpu overclocked. I dont really want a 500 watt psu, because I might crossfire the gpu one day, so I would need a 600 watt psu.

    Here is the spec so you know

    Motherboard: Gigabyte GA-Z77X-D3H
    CPU: i5 3570k
    Ram: Patriot (2x4gb) DDR3 1600mhz
    GPU: Sapphire 7870 2gb DDR5

    Extras:
    1 7200rpm HHD
    2 120mm Fans
    No DVD-tray (I have an external one that FLYS really fast)

    No liquid cooling yet, but I did put that into the calculator because I do plan on getting one in the next few months


    I want to try to keep the psu under $50, I know that's hard but I have seen a few

    Hi - If you want to CF in the future, you need a quality PSU and Coolmax doesn't qualify.
    Secondly, it will be difficult (not impossible) to find a quality PSU for under $50 that has 4 pci-e connectors,
    which you will need if you CF 2 - 7870's. Those PSU's are generally more than $50 and are in the 650w or higher range.
    You might have to check the sites every day for the next week.

    Quality brands: Seasonic, Corair AX, HX, & TX series, XFX, Antec, PC P&C, Enermax, Rosewill Capstone series.

    Tom


    What I am considering:

    Coolmax Power Supply ATX 600 http://www.newegg.com/Product/Product.aspx?Item=N82E16817159079

    Its cheap and is 80 PLUS Certified



    The one component you should not be thinking "cheap" is the PSU.
  2. It's not 80 Plus certified because Coolmax only have four units on Ecova's website, and none of them are 600W.
    There is also the issue of it having a PFC 115 / 230 V switch; only old, outdated designs have that switch nowadays. Old designs like that are less than 80% efficient, if it is less than 80% efficient (@ 20%, 50% & 100% loads) then it can't be 80 Plus certified.
  3. Silvune said:
    It's not 80 Plus certified because Coolmax only have four units on Ecova's website, and none of them are 600W.
    There is also the issue of it having a PFC 115 / 230 V switch; only old, outdated designs have that switch nowadays. Old designs like that are less than 80% efficient, if it is less than 80% efficient (@ 20%, 50% & 100% loads) then it can't be 80 Plus certified.



    Aright thanks :) I have have decided just to spend the extra $30 - 40 for quality, and because I am doing cpu and gpu overclocking

    I am thinking about this psu: Corsair Builder Series CX 600 Watt ATX/EPS 80 PLUS http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028
  4. yamahahornist said:
    Aright thanks :) I have have decided just to spend the extra $30 - 40 for quality, and because I am doing cpu and gpu overclocking

    I am thinking about this psu: Corsair Builder Series CX 600 Watt ATX/EPS 80 PLUS http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028


    Hi - So, are you looking to spend $65-70 total on a PSU then?

    Tom

    I ask because you might be able to do even better than the cx600 (nothing wrong that PSU tho)
  5. yamahahornist said:
    Aright thanks :) I have have decided just to spend the extra $30 - 40 for quality, and because I am doing cpu and gpu overclocking

    I am thinking about this psu: Corsair Builder Series CX 600 Watt ATX/EPS 80 PLUS http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028



    Hi again - For $5 more ($65 net after rebate) you can get the tx650, the tx series is a step up
    from the cx series. At least take a look at it:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005

    Tom
  6. Don't you need a PSU with four PCIe connectors? (7870 crossfire)
    Neither the Corsair CX600 nor the TX650 have four PCIe connectors, only two. I don't understand how the CX600 can be recommended as it has not been reviewed.

    XFX ProSeries 650W Core Edition ($75 @ NCIX US / $10 rebate)
    http://pcpartpicker.com/part/xfx-power-supply-p1650snlb9
  7. Silvune said:
    Don't you need a PSU with four PCIe connectors? (7870 crossfire)
    Neither the Corsair CX600 nor the TX650 have four PCIe connectors, only two. I don't understand how the CX600 can be recommended as it has not been reviewed.

    XFX ProSeries 650W Core Edition ($75 @ NCIX US / $10 rebate)
    http://pcpartpicker.com/part/xfx-power-supply-p1650snlb9

    +1
  8. prototype18 said:
    +1



    Agreed - I forgot the "I might CF one day" part.
  9. I do like both of those PSU, the problem is I need to buy them from Amazon, because I get free shipping (Amazon Prime), but it seems that PSUs are ~$20-30 more on Amazon :( So maybe I will go newegg for the psu?
  10. http://us.ncix.com/products/?sku=59616&vpn=P1650SNLB9&manufacture=XFX&promoid=1373

    Well u should go here to buy. Not neweeg or amazon.its cheaper and this is the way to go !

    If u cant buy from there tell us
  11. yamahahornist said:
    I do like both of those PSU, the problem is I need to buy them from Amazon, because I get free shipping (Amazon Prime), but it seems that PSUs are ~$20-30 more on Amazon :( So maybe I will go newegg for the psu?



    If you're concerned about shipping costs, Newegg offers a trial for ShopRunner for getting free 2 day shipping from several different websites. I signed up for the trial and used it to place my order for my last build, and then cancelled the trial membership.

    It should have a link for the free trial underneath the "Add To Cart" button on Newegg.
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