My first training course from Pluralsight, Understanding Server Hardware has just gone live. It is listed in the SQL Server section of the course catalog, even though it is not really SQL Server specific. It is meant as a foundational course to give you the basic concepts that are applicable to all types of Windows-based servers.
I plan on developing additional hardware-related courses that are SQL Server specific, and even deeper in scope. In the meantime, you might appreciate my recent post on SQLskills.com, Two Database Servers Compared.