Unless it says "verified return" above the cart button, it is a new item.

The processor is new.

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.

The Ryzen 5 5600 is compatible with the AM4 socket, just like the Ryzen 5 5500. As long as your Captiva R75-210 has an AM4 motherboard and the BIOS is up to date, the Ryzen 5 5600 should work without any problems.

Thanks for the tip, I have just reported the error. There are 6 cores involved.

The more expensive one is with a cooler.

No

No, it's just the CPU.

No, a thermal compound is not supplied with the AMD Ryzen 5 5600 processor. However, the processor comes with Wraith Stealth cooling, which is already installed and does not require any additional thermal paste.

Ja, der AMD Wraith Stealth