[tylerhou]

One theory behind ARM's power efficiency is that you don't have to waste power and area converting x86 into uops. But this is a constant overhead. It matters a lot on 5/10W TDP mobile processors, but matters much less on 45W TDP laptop processors.

[martin8412]

Hasn't it been a while since 45W TDP processors were common in laptops? My X395 uses a 15W TDP processor

[neogodless]

No. They are different use cases. Personally I prefer the 45W chips with higher base clocks at the expense of battery life. 15W is unsuitable for some workloads, though the latest 15W "U" chips from AMD are making some waves there.

[tylerhou]

The i9-9980H(K) found in high-end laptops has a 45W TDP. Granted, this is the most power hungry laptop processor you can find.