What is my bottleneck refers to identifying the hardware component in your computer that limits overall system performance, preventing other components from reaching their full potential. A bottleneck commonly occurs when one part, such as the CPU, GPU, RAM, or storage drive, is significantly slower than the rest, resulting in reduced gaming performance, slower rendering, or lag during multitasking. Using a bottleneck calculator or performance monitoring tools can help users determine whether their processor is holding back their graphics card or if insufficient RAM is causing slowdowns. Understanding what is my bottleneck is essential for optimizing your PC, as it allows you to upgrade the right component, improve efficiency, and achieve smoother performance in gaming, video editing, and everyday computing tasks.