The B450 Aorus Elite V2 supports the 5600X since BIOS version F61.
https://www.gigabyte.com/Motherboard/B450-AORUS-Elite-V2-rev-1x/support#support-cpu
The official memory speed support for Vermeer is DDR4-3200 but AMD also states that for Ryzen 5000 series the "sweet spot" is DDR4-3600.
However the B450 Aorus Elite V2 supported memory QVL does not include any DDR4-3600 kits, only DDR4-3200.
https://www.gigabyte.com/Motherboard/B450-AORUS-Elite-V2-rev-1x/support#support-doc
Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT