New machine won't boot

[LCGoes]

I updated the motherboard BIOS to 3.90 with AMD bootkit, as the original BIOS was not compatible with the CPU I bought 

I did the first boot and installed windows 10 64x while using the CPU that AMD sent for the BIOS update (Athlon 240GE with Vega graphics)

But still can't boot with my own parts

 

Any ideas or suggestions? 

 

Motherboard: ASRock B450M Steel Legend (BIOS 3.90)
CPU: AMD Ryzen 5 3600XT, 3.8GHz AM4
RAM: Husky Gaming 8GB 2666MHz DDR4 (x2)
SSD: Adata 480GB SU635 SATA
HD: WD Blue 1TB SATA
GPU: ASUS TUF NVidia GeForce GTX 1660 Super 6GB GDDR6 (3 fans)
Power Supply: AeroCool KCAS 500W 80 plus bronze

 

Edit: The problem was that the RAM would not reach 2666MHz it supposed to. I had to ajust to 2400MHz in the BIOS after some help of friends that had spare parts. Also the BIOS had to be downgraded to P3.70 and now everything is working just fine.

[Haraikomono]

AM4*

Ryzen 5

3600XT(100-000000281)

95W

Matisse 2

4.0GHz

Supported since BIOS Version: P4.20

[LCGoes]

2 hours ago, Haraikomono said:

AM4*

Ryzen 5

3600XT(100-000000281)

95W

Matisse 2

4.0GHz

Supported since BIOS Version: P4.20

That's for the B450, P3.90 ir the most recent BIOS for the B450M Steel Legend

[Haraikomono]

1 minute ago, LCGoes said:

That's for the B450, P3.90 ir the most recent BIOS for the B450M Steel Legend

youre right, sry