CPU for server build
CPU for server build
Consider your needs carefully. For a server handling files, FTP, Plex, and VPN, an i5 offers better performance than an i3. An i5 will likely provide smoother operation across all tasks.
What kind of storage are you using? It would be better to opt for a refurbished server such as a Dell R720. If you prefer something new, a Ryzen 5 3400G would be a solid choice.