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Is 400w good enough fro this?

Hey! I am planning to upgrade i5-9400f GTX 1060 6gb to a i7-8700k RTX 2070 and was wondering if 400w would be enough. I currently use 400w for the i5-9400f GTX 1060 6gb. The wattage calculator said that I'd need 484 but I have seen similar posts saying that it massively overestimates. Help would be appreciated.

Specs are:

Prime H310M-K RD2.0


Intel Stock CPU Cooler

MSI GTX 1060 6GB



x64 Bit

4 Answers

  • 8 months ago
    Favourite answer

    I always go with design-maximum figures for selecting a power supply unit. The ASUS® PRIME H310M-E R2.0 packs two PCIe x1 and one PCIe x16 slots, one M.2 Socket 3 with M Key for up to a 2280 solid-state drive, and a CPU power regulator capable of sourcing 100W (the intel® 9th-Generation Core Processors™ i3-9350KF/i5-9600KF/i7-9700KF are rated for 95maxW). That would make 400maxW for the mobo circuitry and expansion provisions and 120maxW for the CPU power regulator. Highest-power-draw implementations of the geForce® RTX™ 2070 use two 8-pin PCIe auxiliary power connectors; each, ideally, should be on its own +12VDC rail. The minimum power supply from these requirements - it's better to have excess power than insufficient - is the Antec® High Current Pro™ 850 Platinum, which packs four 40A@12VDC rails and a dual-ball-bearing cooler and is rated for a +3.3VDC/+5VDC total draw of 130W.

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    • B. C. Schmerker
      Lv 5
      3 months agoReport

      Not necesssarily, I go design-max to build a safety margin for all intel® 9th-Generation Core Processors (FCLGA 1151).  With the HCP 850, the i5-9400F will have a rock-steady supply.

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  • Lv 7
    8 months ago

    short answer is no. 400W is nowhere near enough for a gaming level computer.

    the video card alone requires 400W...

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  • 8 months ago

    I wouldn't, go with anything below 600W.

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  • 8 months ago

    "My" power calculator says 335 Watts should be enough, provided you don't use any power for externals through the USB connectors. So a good quality 400 W PSU (i.e. one where the 400 W are actually the sustained power) should do the job - provided it has enough outputs to supply the 2070.

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