← All parts of this equation

Equation 1 · Part 5 · AI Datacenter Power and Cooling: A First-Principles Introduction

fraction

q′′=PA,q'' = \frac{P}{A},
fraction

What this part means

Divide the expression above the line by the one below it.

Its job in the formula

The expression above the fraction bar is divided by the complete expression below it. The denominator must not be zero.

The passage around this formula

Heat removal is fundamentally a problem of area, not of power alone. The quantity engineers actually design against is heat flux, power divided by the surface area it must leave through: q′′=PAq'' = \frac{P}{A}. with q'' expressed in watts per square centimetre. Doubling a chip’s power without changing its package size doubles q'' , and every downstream cooling decision in this article follows from trying to hold q'' within what a given cooling medium can actually carry away from that specific surface before the silicon beneath it exceeds its rated temperature.

Read this part in the article →

Learn the underlying idea

A fraction a/b means a divided by b. The top number is the numerator; the bottom number is the denominator, and it cannot be zero.

Open the illustrated fractions: division written vertically guide →

Sources cited in the article section

These citations provide research context; check each source for the exact claim it supports.