PC won't boot with GPU connected to PSU, boots when isn't.

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  • Goats
    PCHF Member
    • Apr 2023
    • 14

    #1

    PC won't boot with GPU connected to PSU, boots when isn't.

    A week ago, my pc stopped booting. Without much thinking and testing, I immediately concluded the PSU is dead since it was old and bad.

    It wasn’t. Bought a new PSU, a corsair 750w. Pc still won’t boot with GPU powered up. Again without much thinking I concluded the
    GPU is dead. This time I didn’t take the wallet out right away and went to my bud and took his GPU to try it in my system.

    PC still does not boot. Now my conclusion was it must be faulty PCI-E slot and i need a new MB, tried both in 2nd PCI slot, same thing.

    So, before i bought a new MB, I also took my GPU to my buds and tried it in his system, the GPU is fine, his system boots with my GPU,
    also, his PSU is weaker than mine and MB and CPU are older.

    Today, the new MB arrived, Aorus elite v2 along with new CPU, R5 5600x and I thought this very puzzling situation is at an end.
    It isn’t. Once again the PC will not boot when the GPU is connected to PSU, it boots without being connected and I get a
    message to connect the GPU to PSU.

    GPU is 1070. The HDMI cable is connected directly from TV into GPU HDMI port. Hopefully I didn’t miss out any details.

    Any help would be greatly appreciated.
  • veeg
    PCHF Director
    • Jul 2016
    • 8982

    #2
    Hello

    Did you install the chipset drivers for the mobo ?

    Comment

    • Goats
      PCHF Member
      • Apr 2023
      • 14

      #3
      Originally posted by veeg
      Hello

      Did you install the chipset drivers for the mobo ?
      Hello, veeg.

      I am not sure how can i do that without being able to get the PC to boot up.

      Comment

      • veeg
        PCHF Director
        • Jul 2016
        • 8982

        #4
        Ok let me get you more help.

        @PeterOz

        Comment

        • PeterOz
          PCHF Technical Response Team
          • Mar 2021
          • 4191

          #5
          Can we have the make and model of the current mb and cpu.
          is the gpu GeForce GTX 1070

          Comment

          • Goats
            PCHF Member
            • Apr 2023
            • 14

            #6
            Hello Peter.

            MB- GIGABYTE Aorus Elite V2 rev. 1.2
            CPU- R5 5600x
            GPU- Gainward GTX 1070

            Comment

            • Goats
              PCHF Member
              • Apr 2023
              • 14

              #7
              Excuse me.

              MB- GIGABYTE B550 Aorus Elite V2 rev. 1.2

              Comment

              • PeterOz
                PCHF Technical Response Team
                • Mar 2021
                • 4191

                #8
                This has got me stumped.
                Just to check you are using 8pin power to GPU.
                I cannot find a pic of the power connector and assume it is molded to accept the power connecter only 1 way?
                The card is plugged into the PCIEx16 slot Not PCIEx2.
                Have you tried to boot without the hdmi cable plugged in?
                Because it turns on without the graphics card plugged in we assume bios version is ok.

                if it still will not boot without any monitor cables plugged in.
                Disassemble and reassemble on a piece of cardboard.
                Test - no cables plugged in - hdmi etc
                Originally posted by Goats
                it boots without being connected and I get a
                message to connect the GPU to PSU.
                Strange that you get a message with no power
                unless it draws minimum power from the pcie slot.
                Let’s get some other advise.
                @Bruce @Evan Omo @Pyro

                Comment

                • PeterOz
                  PCHF Technical Response Team
                  • Mar 2021
                  • 4191

                  #9
                  Originally posted by Goats
                  corsair 750w.
                  Power supply is enough.
                  From the manual.
                  To meet expansion requirements, it is recommended that a power supply that can withstand high power consumption be used (500W or greater). If a power supply is used that does not provide the required power, the result can lead to an unstable or unbootable system.

                  Comment

                  • Goats
                    PCHF Member
                    • Apr 2023
                    • 14

                    #10
                    Originally posted by PeterOz
                    This has got me stumped.
                    Just to check you are using 8pin power to GPU.
                    I cannot find a pic of the power connector and assume it is molded to accept the power connecter only 1 way?
                    The card is plugged into the PCIEx16 slot Not PCIEx2.
                    Have you tried to boot without the hdmi cable plugged in?
                    Because it turns on without the graphics card plugged in we assume bios version is ok.

                    if it still will not boot without any monitor cables plugged in.
                    Disassemble and reassemble on a piece of cardboard.
                    Test - no cables plugged in - hdmi etc
                    Yup, I am using an 8 pin to GPU, it does go in only one way, the pins are U shaped and theres a hook on the connector.

                    The card is plugged into PCIE16 indeed.

                    I tried plucking everything out but one RAM stick in 2nd slot, the m.2, the SSD, also tried without HDMI cable.
                    Still does not power up.

                    I’ll try taking out the board now.

                    Comment

                    • Goats
                      PCHF Member
                      • Apr 2023
                      • 14

                      #11
                      Originally posted by PeterOz
                      Power supply is enough.
                      From the manual.
                      To meet expansion requirements, it is recommended that a power supply that can withstand high power consumption be used (500W or greater). If a power supply is used that does not provide the required power, the result can lead to an unstable or unbootable system.
                      I belive the 750W is way above what i need.

                      GPU tdp is 150W
                      CPU - 65W

                      Think those 2 are the most power hungry and its barely over 200W.

                      Comment

                      • Goats
                        PCHF Member
                        • Apr 2023
                        • 14

                        #12
                        Also, i noticed after a failed attempt to power up the system with gpu connected to to PSU,
                        when i unplug the PCIE cable from it, i’ll first have to turn off the PSU before it would power up again.

                        Dont know if this is of relevance, i’ll just put it here just in case.

                        Comment

                        • PeterOz
                          PCHF Technical Response Team
                          • Mar 2021
                          • 4191

                          #13
                          Originally posted by Goats
                          when i unplug the PCIE cable from it,
                          Pcie cable?

                          Comment

                          • PeterOz
                            PCHF Technical Response Team
                            • Mar 2021
                            • 4191

                            #14
                            Originally posted by Goats
                            I belive the 750W is way above what i need.
                            Yes, as I posted it only needs 500W so even with a crappy ps it is still enough, and corsair are not what I would call crappy.

                            Comment

                            • Goats
                              PCHF Member
                              • Apr 2023
                              • 14

                              #15
                              Alright, the board is out, reassembled everything, exactly the same result, unfortunately.

                              Comment

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