Can't access BIOS with harddrive connected

Hey Everyone! I have/had a working Hackintosh on a new build. The motherboard failed so I RMA'd it and swapped it out. Now on the new Motherboard if I have no harddrive attached I can access the BIOS; however, if there is a drive attached I cannot access the BIOS. Even without being able to access the BIOS it boots straight into MacOS, but I know something is wrong, I just don't know what. It may or may not be a Hackintosh issue but I don't know... anyone have any experience with this issue?

The first board let me into the BIOS with the HD attached before it died.

SYSTEM:

  • Opencore 0.5.9
  • Monitor: Samsung U28E590D 28-Inch UHD LED
  • Motherboard: Asus Prime z390 A
  • Processor: Intel I5, 9600k
  • Video card: Gigabyte Gaming RX580
  • Ram: 32g 3200 (2x16g)
  • HD: Samsung 970 Evo Plus M.2 (OC and MacOS)
  • WIFI/Bluetooth: Fenvi T919
  • Accessories: Mac Keyboard, Mouse & Trackpad, Cheapest USB speakers I had laying around :)
submitted by /u/therealt00lz
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