No, a B450 pro motherboard is not compatible with a Ryzen 7 5700X CPU.
No, a B450 pro motherboard is not compatible with a Ryzen 7 5700X CPU.
According to the BIOS documentation, your chipset should work without issues. The model you have isn’t critical—just confirm the exact motherboard type. I own an Asus Prime B450M Pro with a 5800X3D, which performs perfectly. Some earlier B450 models had weaker VRMs, making them less ideal for high-end or heavily overclocked setups. Running a 5900X at 5.1GHz with around 180W should be safe, and the X3D chips are notably efficient, drawing only up to about 65W. The 5700X3D is a straightforward upgrade for most AM4 systems.
Visit the motherboard maker's site and read their steps. If your setup matches theirs: prepare a tiny USB pen drive (often an old 256MB one) and format it to FAT, then extract the BIOS file onto it. Open the BIOS settings and select the update option from that folder. Avoid shutting it down during operation—it may take 5 to 10 minutes. Remember, stick to the specific guidance provided by your motherboard manufacturer.
You can watch this video. You'll need a USB stick with 32GB or less, formatted as FAT32. An older USB stick under 32GB works too, as long as it meets the size requirement. I use a USB flash drive from 2007. If you have any questions or need clarification, just let me know and I might help via Discord or similar. I don’t mind.