Hackintosh started failing to boot

Hi, hoping someone can offer me a pointer. I have a dual-boot system (Windows / Hackintosh) with Windows and hackintosh on separate disks. The Hackintosh is a hybrid HDD/SSD.

Up until recently this has been working fine. But now it fails on boot. I don't remember changing anything that would cause this, but obviously something has changed.

The system is a Dell XPS8700, with a Haswell i7-4700 CPU.

When I boot with -v, I see some text and a row of plus signs (+++++++++++) before the screen goes blank and the system reboots from scratch.

My EFI/CLOVER/drivers64UEFI contains: * apfs.efi * AppleImageCodec-64.efi * AppleKeyAggregator-64.efi * AppleUITheme-64.efi * DataHubDxe-64.efi FirmwareVolume-64.efi FSInject-64.efi OsxAptioFix2Drv-64.efi SMCHelper-64.efi VBoxHfs-64.efi

This box was upgraded from Sierra some weeks ago and has been working fine since.

I did note that the Graphics ID is 0x00000000, but changing that to 0x12345678 did not help the problem.

Any pointers? Many thanks!

submitted by /u/hamacting
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