H470m-hdv and RX570 GPU problem

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   If CSM bios setting is set to "disabled" PC won't boot...there is no picture, can't even enter BIOS.
GPU-Z says Sapphire rx570 ITX supports UEFI, and same GPU works with CSM disabled on another, AMD b450 chipset based motherboard.
BIOS is latest for H470m-hdv board, 1.30

Any ideas welcome, as I'd like to upgrade to windows 11

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Branko Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 01 Sep 2022 Status: Offline Points: 55	Post Options Post Reply Quote Branko Report Post Thanks(0) Quote Reply Topic: H470m-hdv and RX570 GPU problem Posted: 22 Feb 2023 at 6:47pm
	If CSM bios setting is set to "disabled" PC won't boot...there is no picture, can't even enter BIOS. GPU-Z says Sapphire rx570 ITX supports UEFI, and same GPU works with CSM disabled on another, AMD b450 chipset based motherboard. BIOS is latest for H470m-hdv board, 1.30 Any ideas welcome, as I'd like to upgrade to windows 11

threadzipper1957 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 05 Mar 2022 Status: Offline Points: 9365	Post Options Post Reply Quote threadzipper1957 Report Post Thanks(0) Quote Reply Posted: 10 Mar 2023 at 8:42pm
	Windows must be installed in GPT (UEFI Mode) Above 4G should be enabled, and Clever Access memory, also. When you connect the onboard graphics, is the RX570 found in device manager. If not check the pins in the CPU socket, or fill in the tech supprot form https://tw.asrock.com/events/tsd.asp Check Your spam folder for replies.
	Kind Regards