Booting problem with ASRock Z890 Pro RS WiFi

Hello Ladies and Gentleman,

I have just have finished building my PC, everything seemed fine until it was time to turn on, when I start the machine it powers up, it does light up in orange on the BIOS indicator (DRAM faulty?) however, in a few seconds it goes back to white (assuming it cleared the fault?), then nothing happens. It stays turned on, seeing the fans moving and RGB being on. After two-three restarts it does boot with the logo and very strange red and green stripes screen shows on the monitor, with the ASRock logo in the back, seemingly frozen as nothing happens when I press F2/DEL. Another restart of the machine, Yellow light, white light, then turns off the BIOS indicator and boots up normally. I have updated the BIOS to 1.21 as it was in factory settings. Nothing really changed, Windows seems to be working just fine. I have ran several SSD/RAM diagnostics, showing 0% faults. The preset of the RAM efficiency was set to 3200 MTS, have also changed that to 6400 MTS as my RAM is 32 GB DDR5 6400 MHZ. Also the booting order is set as primary for the SSD, I am missing something but what is it... It drives me crazy.... Please if you had any similar resolved issues, let me know anything worth trying. Also forgot to mention, booting up is taking more than 3 minutes... as per previous experiences should not take more than 1 minute... Thanks again...