The 6600K has hyperthreading, which allows the processor to effectively double its number of cores. This enables it to handle more tasks simultaneously, and can result in better performance when multitasking or running demanding applications. That being said, hyperthreading is not without its downsides. First, it can slightly increase power consumption and heat generation. Second, it can potentially create conflicts if two threads are vying for the same resources. As such, it's often disabled by default on many motherboards. So if you're looking to get the most out of your 6600K, be sure to enable hyperthreading in your BIOS settings.