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  1. #1
    ROG Member Array
    Join Date
    Mar 2015

    780s SLI Power Supply Query

    Had a question about gtx 780s SLI and the power supply.

    I just picked up an EVGA supernova P2 1000 watt PSU
    which should be more than enough for this older build
    I7 4790k @4.5, 1.210 v
    16-gig ddr3 -2400
    2-7200 hd
    1 -200mm fan
    4-120mm fan
    and corsair h75 CLC.
    I tried a seasonic 850watt PSU, the PCI-E cables were 6+2 and i used 4 separate cables for my 2 cards
    The 6+2 connectors have 8 pins on both ends of the cables,but the side that hooks up the power supply has only 6 actual metal pins and not 8
    I thought with allot of these higher wattage cards you want to use all 8 pins for enough power.
    I do know they jumpered those 2 pins on the card side of the cable, am i being to picky or thats how make the PSU now.
    Also when i up grade to single 1080 or even 1080 TI, will this EVGA p2 1000 be to much over kill?

  2. #2
    ROG Guru: Gold Belt Array Menthol PC Specs
    Menthol PC Specs
    MotherboardM 10 Apex / XI gene
    Processor8700K / 9900K
    Memory (part number)2x8 Gskill Trident Z 4266/2x2x8 Gskill Trident Z 4500
    Graphics Card #1RTX 2080ti / GTX 1060
    Sound CardSoundBlaster Ae5 / Onboard
    MonitorBENQ 32" 4K
    Storage #1Intel 900p 480GB/Samsung 960 Pro 1TB
    Storage #2Intel 750 1.2TB/Plextor 1 TB 2X 950 Pro
    CPU CoolerCorsair H150i AIO / H1110i
    CaseCorsair 740 ? Lian Li Air
    Power SupplyCorsair AX 1200i / AX 1200i
    Keyboard Corsair
    Mouse ASUS Strix
    Headset HyperX Cloud Alpha
    Mouse Pad ASUS
    Headset/Speakers Logitech Z906
    OS 10 X64 Pro
    Network RouterVerizon Fios
    Accessory #1 Intel Wifi BT pcie card
    Accessory #2 Red Bull
    Accessory #3 English Breakfast Tea
    Menthol's Avatar
    Join Date
    Jan 2012

    If the PSU powers your system without issue the cables are fine, 780's are power hungry, over kill? what's that. If you already own the PSU why replace it when your power needs are lower, can't hurt anything

  3. #3
    ROG Member Array
    Join Date
    Mar 2015

    Thanks Menthol, i know this late

  4. #4
    ROG Guru: Green Belt Array
    Join Date
    Feb 2019

    More than plenty. GPUs are under 120 watts each. 4970K OC to hell and back anotehr 140W all the rest not 100watts combined. pair of 1080ti cards about 500 watts for both.
    So you have room to grow and the EVGA supernova is a decent PSU.

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