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by ksec 1759 days ago
>AMD 5850U beats Apple M1 in multicore performance by 29% having the same power consumption (15 Watt):

The last part is not entirely accurate. They have the same TDP. Not the same power consumption. Because 5850U doesn't use 15W in those test. The same goes to M1 which is closer to 20W Max.

The word TDP means Typical TDP by both Intel and AMD and not what it means in literal sense. That is excluding cTDP and other state like PL2.

Worth mentioning the M1 achieve those single thread performance at no more than 5W, if you put the two on equal footing, even accounting for the possible node improvement, M1 is still quite far ahead in terms of pref / watt. And the 5850 is already on Zen 3.

2 comments

Indeed, thank you. It's plainly pathetic this has to be said so often, especially here FFS. Every time this topic comes up "AMD can do the same, 15W" as if the "15W" figure was a terminating value from a set of industry-standard "TDP" figures. It is not, and the "TDP" listed at best offers a clue as to the power draw. Not much more. Hell, it can even differ by motherboard config. Intel encourages it.

The next emotional preservation tactic usually cites the old GF IO Die, but that was only on H/desktop series chips anyways and furthermore they still lose to Apple in sheer performance per watt.

It's August 2021 and we still have to have this conversation. Sigh

It's really _highly_ misleading. I read OPs comment and assumed they are talking about measured power, not TDP.
Don't forget the GPU either. With all the cores going full-out, the M1 can still run its GPU at high clocks.

AMD reduced the CU count down to 8 and ramped the clockspeeds which is terrible for the thermal budget. If you need to offload stuff to the GPU, both GPU clocks and CPU clocks dramatically lower. AMD needs a 16CU design with RDNA2 if they hope to actually compete with current and upcoming designs.

Speaking of upcoming, Apple's next generation will be announced in the next 2-3 weeks. A15 and either M1X or M2 (or maybe both) on N5P which should be 10-15% better than the previous N5 process. That's what 5850U is actually competing against considering how long it took to get out the door.

Things aren't looking pretty for x86. Now if we could just get some nice RISC-V designs shipping...