Most modern central processing units (CPUs) are multi-core, meaning they contain multiple processing units that can handle different tasks simultaneously. However, the advantages of increasing the number of cores are not always clearly explained. For example, what distinguishes a single-threaded application from a multithreaded one? What is Hyper-Threading, and how does it differ from standard multithreading?
To better understand the benefits of additional cores and Intel® Hyper-Threading Technology, let’s explore these concepts and how they affect gaming and everyday applications.
What Is Multithreading?
Multithreading is a method of parallel processing that divides work into smaller, manageable tasks called threads. Instead of assigning a large task to a single core, multithreaded programs split the workload across multiple threads, which are then processed simultaneously by different CPU cores. This approach helps reduce processing time.
In the context of gaming, some games are lightly threaded, relying primarily on a single core and benefiting more from higher clock speeds. In contrast, newer game engines like Unreal Engine 4 utilize multiple cores to manage complex scenes. Additionally, multithreading is used to handle various aspects of "draw calls"—commands sent from the CPU to the graphics processing unit (GPU) to render in-game objects, textures, and shaders.
What Is Hyper-Threading?
Intel® Hyper-Threading Technology is a hardware feature that allows more than one thread to run on each physical core. By enabling more threads, the CPU can perform more tasks in parallel, improving efficiency.
How does Hyper-Threading work? When enabled, the CPU presents two execution contexts per physical core, effectively turning one physical core into two "logical cores." These logical cores can handle different software threads simultaneously. This allows the CPU to make better use of idle time, which was previously wasted while waiting for other tasks to complete. As a result, Intel® Hyper-Threading Technology increases CPU throughput.
If you're curious about enabling Hyper-Threading, it is typically activated by default, but you can manually turn it on or off through the BIOS by setting the "Hyper-Threading Technology" option to "Enable" or "Disable." It's important to note that Intel® Hyper-Threading Technology is only available on certain high-performance CPUs, and a full list of compatible models can be found online.
What Benefits Can I Expect from Hyper-Threading?
With CPU Hyper-Threading, a computer can process more information faster and run more background tasks without interruption. Under the right conditions, the technology allows CPU cores to perform two tasks at the same time. This is especially beneficial for multitaskers, streamers, and professionals who use heavily threaded applications. Upgrading to a gaming laptop or desktop CPU with Intel® Hyper-Threading Technology can significantly enhance their computing experience.