Speed binning is the practice of testing each die and sorting by maximum operating frequency, then selling faster chips at premium prices and slower chips at lower prices. It's how chip companies extract maximum value from manufacturing variation.

How Binning Works

Not all dies from the same wafer perform identically—process variation causes some transistors to switch faster or slower than nominal. After wafer fabrication, every die is tested at multiple frequencies and voltages. Dies are sorted into bins based on the highest frequency they can sustain while meeting power and reliability specifications.

Binning in Practice

Take Intel Core processors as an example: all Core i5, i7, and i9 dies may come from the same silicon design. The fastest dies become i9 (highest clock speeds, premium price). Good-but-not-fastest become i7. Average performers become i5. Dies with minor defects (one core disabled) become lower-tier products.

Binning Variables

• Frequency: Maximum stable clock speed at rated voltage • Power: Leakage current determines TDP (thermal design power) bin • Functional blocks: Dies with a defective core, cache block, or GPU unit can be sold as lower-SKU products with that block disabled • Voltage: Minimum operating voltage at target frequency (lower Vmin = more efficient)

Revenue Optimization

Without binning, a company would have to price all chips at the lowest common denominator. Binning captures the value of the best silicon. A $200 average die might sell as: 10% at $600 (premium bin), 30% at $300 (mid bin), 40% at $150 (value bin), 20% at $80 (budget/defect bin). The revenue-weighted average far exceeds a flat-price approach.

Yield Recovery

Binning is also a yield recovery strategy. Dies that fail at the top spec aren't scrapped—they're sold as lower-tier products, converting potential scrap into revenue.