Hello @Tigers7612
Thank you for reaching out to us.
1. Is it Rysen 9 5900x ready out of box or do I need bios update?
Generally, a motherboard should boot after installation with a compatible CPU.
According to the ROG STRIX B550-F GAMING (WI-FI)’s CPU QVL, the Ryzen 9 5900X was first verified with BIOS version 1004, while the latest available BIOS version is 3611.
We recommend keeping your system up to date by installing the latest BIOS to take advantage of improved functionality and performance enhancements. You can consider proceeding with the BIOS update after completing the initial installation.
2. Will it support Orion ram?
For memory specifications, any memory that meets the listed specifications should be supported.
Also, ASUS has verified the motherboard for optimal stability and compatibility with devices listed in the Memory QVL.
We recommend using the QVL list and the purchasing and installation guide available on the same page as a reference when selecting memory.
For more details on both points above, please refer to [Motherboard] How to query (CPU/memory) QVL List?
3. Will it support rtx 3090?
The RTX 3090 graphics card is PCIe 4.0-compliant and is compatible with the PCIe 4.0 x16 slot on the motherboard.
For related setup instructions, please refer to pages X and 1-7 of the user manual.
Thank you.
