Quote from: km on February 15, 2023, 14:51:14RobertJasiek
Light load x86 might be comparable, sure.
But the thing is that under load MBP runs for 8-9 hours without throttling the CPU where Intel and AMD would throttle like mad or will cut the battery life by 50%.
You are missing the point here. It's not about Apple vs Intel or AMD, it's about ARM vs x86 architecture.
You don't see x86 cpus in phones (also mobile device) for a reason.
I do not believe it is a difference between x86 and ARM for the following reasons
- The Surface Pro X was slower than the Intel CPU and had a similar battery life (about 6 hours) even when using only ARM native apps, under MS Office-like load.
- In Chromebooks, x86 has gained significant market share despite it's proximity to Android and affinity for ARM. intel had publicly stated that Jasper lake would be "the last Atom-only CPU", but due to its popularity in Chromebooks, ADL-N was newly designed. It was first tested by Google and is believed to be at Google's request.
- According to the "Intel Alder Lake-U Review" on this site, the MT power efficiency of the Ryzen 7840U is expected to be comparable to that of the M2; limiting the 13900K or 7950X to 60W will give power efficiency close to that of the M1 Ultra.
From these, the following can be deduced.
- The advantage of M1 is mostly attributed to the advantage of N5. If Comet lake had been manufactured on N5, the M1 would have been less impressive and the SQ1/2 would have been garbage.
-The second advantage of M1 is due to its high IPC and low clock orientation: while Intel and AMD raise it to 5 GHz in ST operation, M1 keeps it at 3 GHz, making it more power efficient. x86 also lowers it to 3 GHz or lower in MT operation, then the efficiency of M1 and x86 become to be similar. Especially in high load, the M2 Max Macbook Pro lasts only 1 hour, whereas the ADL-H+GeForce combination lasts 2 hours.
In addition, the following is expected.
- Theoretical values ��show that if ADL-P is kept the same design and the same clock, the power consumption will be reduced by 40% just by manufacturing with Intel4 and by 65% with Intel 20A. Consequently, it is more efficient than M2.
- Both Intel and AMD are oriented toward high IPC and low clock designs.
Perhaps, but I expect the 2024 holiday season to be a showdown between M3 and Arrow/Lunar, with Intel winning in both power efficiency and absolute performance.