EvilDragon wrote:stratum wrote:(after all intel cpus are not power efficient)
They certainly do have power efficient CPUs in their product range. Compute Stick?
I've seen several *recent* ARM vs Intel server benchmarks on the net, and ARM is very far behind in single-threaded performance. ARM is more power-efficient at the frequencies they run at, but if they ever get to the same core-for-core performance level, I do not think they'll still be considerably more power efficient. I think it's mainly a marketing hype surrounding ARM that it is more power efficient; I would say, its power efficiency is more scalable: it is more power-efficient as a multi-core system, but as a single-core system its power efficiency is uncertain.
At the base level it's the same transistors performing instructions of a given complexity. In my opinion CISC should have a higher performance in the same manner as SIMD has higher performance: less state switching, more actual computing per operation.
But we'll see. AMD with Ryzen was able to boost performance per watt (even though their single-threaded performance is lower than Intel), more improvements are on the way. Apple has to compete not only with Intel, but with AMD now.