TDP (Thermal Design Power)

TDP (thermal design power) is a rating, in watts, that a manufacturer gives to describe how much heat a chip's cooling system should be able to dissipate during sustained, typical load. It guides cooler selection and is not a precise measure of electrical power draw.

Why it matters

Vendors define TDP differently, and modern processors boost above it for short or even long periods. Intel lists a base power (PL1) and a higher turbo power (PL2), and AMD processors can draw more than their stated TDP through a limit called PPT. So a CPU labelled 65 W can briefly consume well above that, and a cooler built only for 65 W may run hot under heavy load.

TDP also matters for laptops and small cases, where the cooling budget is limited. Some laptop makers let you configure the TDP in software, trading speed for noise and temperature.

Example

An AMD desktop chip rated at 105 W TDP has a package power limit of about 142 W by default. A cooler rated for 105 W might therefore be marginal, while one rated for 150 W or more leaves headroom for boosting and warm rooms.

Common mistakes

• Using TDP to size the power supply; use the whole system's maximum draw instead.
• Comparing TDP across brands as if it meant the same thing.
• Buying a cooler exactly at the rated figure.
• Confusing it with thermal throttling, which is the response when cooling falls short.

Related

• Thermal throttling
• Heat sink
• PSU
• CPU

यह पेज सामान्य जानकारी है, जिसे हमारी संपादकीय टीम ने लिखा है और दस्तावेज़ीकरण बदलने पर अपडेट किया जाता है। सर्वर और प्रदाता अलग-अलग होते हैं, इसलिए बदलाव पहले सुरक्षित तरीके से जाँचें। देखें: संपादकीय नीति और अस्वीकरण.