Why Don't They Make BIGGER CPUs?

This TechQuickie episode explores why CPU makers do not simply enlarge the silicon die to gain more cores or higher performance. The host explains that a bigger CPU die would reduce manufacturing yields, meaning more chips fail quality checks and are discarded, which drives up cost per usable chip. Heat management becomes more challenging as die size grows, and maintaining synchronized performance across a larger package can require lower clock speeds to avoid thermal throttling. The video uses an analogy with car engines to illustrate the trade-offs: a bigger engine can deliver more power but costs more to produce and may not fit the intended use case efficiently. It also notes that higher core counts often come with slower single-thread performance, which matters for many applications like gaming. Instead of brute-forcing with more transistors, CPU designers optimize architecture for specific workloads, such as video transcoding or fast storage interconnects, balancing core count, cache, and clock speed to meet real-world use cases. The presenter closes by emphasizing that bigger is not inherently better and hints at how product teams design CPUs around target workloads and market needs rather than chasing the largest possible die.

Topics · science and technology · computer hardware · cpu design · manufacturing · engineering