Computers, Laptops & Tablets Accessories & Hardware What Is Thermal Design Power? An explanation of TDP for PC parts by Christine McKee Writer Christine McKee is a former Lifewire writer covering PC video gaming gear and technology. She's also written for other top news sites. our editorial process Christine McKee Updated on October 20, 2020 Accessories & Hardware The Quick Guide to Webcams Keyboards & Mice Monitors Cards HDD & SSD Printers & Scanners Raspberry Pi Tweet Share Email When reading reviews of CPUs or graphics cards, you may come across the term TDP. Learn what TPD is and how it affects PC performance. Mordolff / Getty Images Definition of TDP, or Thermal Design Power TDP stands for thermal design power (or thermal design point). A component's TDP is the amount of power the cooling system needs to dissipate to keep the chip at or below its maximum temperature. For instance, a 244-watt TDP on a graphics card means the cooler can siphon out up to 244 watts of heat to keep the GPU in check. A high TDP indicates better performance. However, the higher the TDP for a graphics card or CPU, the more power it consumes. How Much TDP Do You Need? If you intend to use a third-party cooler with a CPU or GPU, it must be rated at or above the TDP of the part the cooler will be attached to. In addition, if you plan to overclock the part, you'll need a cooler that is rated above the TDP of the part to properly cool it. Failure to have a properly rated TDP cooler can shorten the lifespan of the graphics card or CPU and cause thermal shutdowns when the parts are pushed too hard.