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  1. #1
    Joined
    Jan 2003
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    Carol Stream, IL USA
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    What Size PSU For New Build

    I'm in the planning stages for a new build and am wondering what size PSU would be best for the following items.

    Processor: Intel i7 Skylake 6700K
    MB: Asrock Z170 Extreme6+
    Memory: G.Skill Ripjaws V Series 16GB DDR4-3200
    GPU: XFX Radeon R9 390 8GB
    SSD: Samsung 850 Evo SataIII 500GB

    The above items are just preliminary and might get changed around in time when building begins. So, what size PSU would work best with these items?
    Last edited by captkirk; 09-08-2015 at 07:50 PM.

  2. #2
    Joined
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    Location
    Janesville, Wi
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    6,453

    Re: What Size PSU For New Build

    A solid 650w would get you by...

    I'd get a 750w or so.

    Just make sure either is a quality unit


  3. #3
    Joined
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    Carol Stream, IL USA
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    Re: What Size PSU For New Build

    Thanks for the info...........appreciate it.

  4. #4

    Re: What Size PSU For New Build

    Quote Originally Posted by captkirk View Post
    I'm in the planning stages for a new build and am wondering what size PSU would be best for the following items.


    GPU: XFX Radeon R9 390 8GB
    Quote Originally Posted by mmettin View Post
    A solid 650w would get you by...
    No it won't
    The minimum recommended PSU for that card is 750W
    I would recommend a 850W or even a 1000W
    It's All About Having Fun ..... Isn't It?

    Gigabyte GA-990FXA-UD3 | AMD FX8350 Black Edition | CoolerMaster Hyper 212 EVO | Corsair XMS3 16GB DDR3
    XFX Radeon HD 7950 3GB DDR5 | Acer G246HL 24" WideScreen
    Samsung 840 EVO 500GB | Western Digital Caviar Black 500GB (Storage) | Samsung SH-S224 DVD Burner
    HT|Omega Claro | Technics SL-1210 MKll ~ Stanton 681EEE MKlll
    Esoteric Sounds Rek-O-Kut Professional Phono Preamp MKII
    Klipsch Pro Media v4.1 | Sennheiser HD 580 Precision ~ Sennheiser PC165 (Mic/Headset)
    Lian Li Lancool PC-K7B w/ Enermax NAXN 82+ 750W
    Win7 x64

  5. #5
    Joined
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    Location
    Columbus, Ohio
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    Re: What Size PSU For New Build

    According to the Newegg calculator you'd need at least 684. I'd go atleast 1000 to make sure you have plenty of overhead, room for expansion, and can offset capacitor aging.

    I always go overkill on my PSU though. As you can see from my signature. I've got a 750 Watt PSU in a rig using onboard video.
    Motherboard: ASRock Z97 Extreme4
    CPU: Intel Core i5-4590 Haswell
    RAM: 8GB Mushkin DDR3
    HDD1: Mushkin Enhanced ECO2 120GB SSD
    RAID 1 Array: Mushkin Enhanced ECO2 512GB SSD x 2
    PSU: CORSAIR CX750
    OS: openSUSE Tumbleweed

  6. #6
    Joined
    Jan 2016
    Posts
    3

    Re: What Size PSU For New Build

    Based on those parts I get a total of 460W, personally I think a 1000w PSU would be overkill, but that's just me.

  7. #7
    Joined
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    Location
    Columbus, Ohio
    Age
    35
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    2,139

    Re: What Size PSU For New Build

    XFX says 750 is a minimum, they recommend an 850. So I'd go at least 850.

    1000 may be overkill, but a good quality PSU with plenty of juice to run your system is a great place for overkill in my book.
    Motherboard: ASRock Z97 Extreme4
    CPU: Intel Core i5-4590 Haswell
    RAM: 8GB Mushkin DDR3
    HDD1: Mushkin Enhanced ECO2 120GB SSD
    RAID 1 Array: Mushkin Enhanced ECO2 512GB SSD x 2
    PSU: CORSAIR CX750
    OS: openSUSE Tumbleweed

  8. #8
    Joined
    Jun 2012
    Posts
    194

    Re: What Size PSU For New Build

    I'll be the first to recommend you get a quality PSU which exceeds the recommended wattage...but for one GPU with a 6- & 8-pin connector, I don't care what XFX says, 850 recommended is overkill. Keep in mind they're in the business of selling PSUs, so it would behoove them for you to get a more powerful (read more expensive) PSU.

    Using eXtreme Power Supply Calculator, it estimates a load of 490w and a recommended PSU of 540w or more, so 550w. Again, I would go 600-650w but even at 600, you're still 20% above load requirements.

    Hope this helps.

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