The Ryzen 5 5600 processor is compatible with motherboards that have the AM4 socket and ideally a B550 or X570 chipset. Since your PC uses a Ryzen 5 5500, which is also AM4-based, the Ryzen 5 5600 should generally be compatible, provided the motherboard supports a BIOS update for the Ryzen 5000 series or is already up to date.

It is important that the motherboard for the Ryzen 5 5600 has a BIOS with support for the 5th generation Ryzen processors, otherwise an update may be necessary. Many B550 and X570 motherboards are compatible, but some require a BIOS update before use. Since your PC uses a GeForce RTX 3050, the PCIe 4.0 support of the Ryzen 5 5600 is also advantageous.

To summarise: If your Captiva R75-210 motherboard supports AM4 sockets and an up-to-date BIOS for Ryzen 5000, the Ryzen 5 5600 is compatible and can replace the Ryzen 5 5500.