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High performance cores use a lot of transistors and take up a lot of space. When you are aiming for high performance, this is a good tradeoff. The efficiency
by Kon-Peki 3y ago
High performance cores use a lot of transistors and take up a lot of space. When you are aiming for high performance, this is a good tradeoff.
The efficiency cores are physically smaller, cheaper, etc. One you reduce the performance expectations to the point where they satisfy the requirements, they are a much better choice. The efficiency core has more perf-per-watt than a clocked-down performance core.
It seems counterintuitive. But when your budget for transistors is X and your budget for power draw/heat dissipation is Y, and there is no leeway whatsoever, the big.LITTLE concept gets you more aggregate performance.
- MichaelZuo 3y agoCan you link an analysis for that where small cores have more perf-per-watt then a clocked down big core? From what I understand the transistors aren't mostly for enabling the higher clock speed at all, they allow for wider cores that do more per cycle. It doesn't seem clear at all that they would be less efficient than a narrower design that does less per cycle, if clocked much lower to yield the same final performance per cycle.