This clock speed is much faster than the advertised base clock speed, and much slower than the advertised maximum single-core-turbo speed.īecause all CPU cores are active in this scenario and drawing power, the all-cores-turbo speed is set lower than the maximum turbo speed, in order to ensure the CPU power draw doesn’t become excessive and overheat the CPU. For CPUs, the ‘All Cores Turbo’ is the maximum clock speed the CPU will operate at, when all CPU cores are actively processing data at the same time.Therefore, neither the maximum turbo nor the base clock tells you very much about the real world performance of the CPU.īecause of those deficiencies, the primary focus of this article is the often-misunderstood and poorly documented “all cores turbo” CPU clock speed. Whenever the CPU is actively doing work, the active cores will almost always run faster than this base clock. This base clock speed is a very conservative advertised minimum CPU speed that the CPU almost never runs at. The base clock speed is the other commonly advertised CPU speed.

Due to power and heat limitations, this maximum speed is only engaged when just one CPU core is active. You can think of the maximum single core turbo as the speed the processor can safely run at. The maximum turbo is only achievable when a single CPU core is actively processing work, so this rarely applies to servers. This metric is not terribly useful for servers, as a heavily loaded server will have multiple cores active simultaneously. To begin, let’s start with looking at the single-core turbo (maximum turbo) that Intel ctively advertises. In the server hosting industry, one of the most confusing hardware performance statistics we are faced with is CPU ‘core performance’, a metric that is advertised differently by just about every manufacturer, which makes it about as easy to understand as string theory, algebra or if pineapple belongs on pizza!įor today’s blog entry, we want to break through some of the confusion around CPU core performances, including base clock speeds, max turbo speed, and all cores turbo, and help explain the importance of all cores turbo as it relates to real CPU performance.

How to enable turbo boost skylake