![]() There’s additional latency if the CPUs need to communicate with each other, systems with multiple CPUs consume more power, and the motherboard needs more sockets and hardware. There’s a lot of overhead in this kind of setup. The motherboard also needs additional hardware to connect those CPU sockets to the RAM and other resources. This requires a motherboard with multiple CPU sockets. RELATED: Why You Can't Use CPU Clock Speed to Compare Computer Performanceīefore hyper-threading and multi-core CPUs came around, people attempted to add additional processing power to computers by adding additional CPUs. That single CPU may have multiple cores or hyper-threading technology - but it’s still only one physical CPU unit inserted into a single CPU socket on the motherboard. Intel also introduced the idea in mainstream desktop CPUs, starting with its Alder Lake processors. When you need your phone to last all day, it doesn’t make sense to drain your battery unnecessarily by running a high-power core all the time. This heterogeneous multi-core setup (called big.LITTLE by ARM) first became popular with cellphones and other mobile devices because of the power savings they offered. RELATED: What Is Undervolting a GPU or CPU, and When Should You Do It? The combination results in performance when you need it, but lower background energy use. They consume significantly more power but give much better performance in demanding tasks, like gaming. Performance cores are the exact opposite. The efficiency cores are reserved for background and low-demand tasks. ![]() The precise naming scheme varies a bit between companies and applications, but the basic idea is the same.
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