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Getting performance per watt out of the smaller CPUs is actually more impressive because they can't amortize the non-CPU power draws in the system over as much
by AnthonyMouse 2mo ago
Getting performance per watt out of the smaller CPUs is actually more impressive because they can't amortize the non-CPU power draws in the system over as much performance. Increasing the performance while maintaining that performance per watt is then entirely straightforward because you just use more of the same cores.
- aurareturn 2mo agoExcept Intel's Core 5 320 is almost certainly bigger than the A18 Pro CPU.
- AnthonyMouse 2mo agoThey both have 2 P-cores and 4 E-cores.
- aurareturn 2mo agoYes, they both have the same and Intel cores are known to be bigger than AMD and Apple cores but poor in area/performance. So I'm not sure what your original post about smaller cores is all about considering that the A18 Pro CPU is almost certainly smaller in actual die size.
- AnthonyMouse 2mo agoIt's not about die area at all. It's about the SSD and chipset and WiFi etc. each using power on top of what the CPU uses, and ending up as a much larger percentage of system power draw for a 15W CPU than for the same system with a 60W CPU that has around four times the multi-thread performance by having four times as many of the exact same cores.
- aurareturn 2mo agoYou lost me. Maybe you can articulate what you're arguing from the start?
- AnthonyMouse 2mo agoSuppose you have a system that under some workload will draw 10W to run the chipset, WiFi, SSD and so on and another 15W to run the CPU, so that it's 25W in total. The 15W CPU has X number of cores and gets a score of 1000 on some benchmark. Performance per watt is 40 points per watt. If you put 4X of the same cores in the same system then the CPU uses 60W, the WiFi etc. still use 10W, so the whole system uses 70W. It scores 4000 points and the performance per watt is 57 points per watt. You got four times the multi-thread performance and performance per watt went up.
- aurareturn 2mo agoThat's why any CPU reviewer worth their salt will isolate CPU power.
- podocarp 2mo agoWhich reviewer does that? How do you isolate CPU power? Measuring the pins? Software reporting is half bullshit. Also nobody even reports idle power. Don't tell me idle is hard to define bla bla we all know what's idle. Even an inaccurate figure is better than no figure. And there are community compiled lists that are very helpful when building systems. So where is the reviewer worth their salt you're talking about?
- aurareturn 2mo agoNotebookcheck always isolates CPU power by measuring idle and draw from the wall. Many top quality CPU reviewers also do this. Chinese reviewer Geekerwan is probably the best at it. In the past, written reviews like Anandtech will always do it. Today, anyone with video editing software thinks they can review CPU performance. Ever since Youtube, there have been plenty of low quality reviewers that mislead people. I didn’t know who this Jeff guy was but now he’s on my list as one. There are still some who do proper reviews.
- AnthonyMouse 2mo ago