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>At the same power AMD can stuff twice the cores Note that the “TDP” is meaningless for actual performance/watt comparisons with a controlled parameter due to
by leucineleprec0n 5y ago
>At the same power AMD can stuff twice the cores
Note that the “TDP” is meaningless for actual performance/watt comparisons with a controlled parameter due to the variation in this term. It’s just a marketing term.
The Ryzens on 7NM consume much more power than Apple’s Big cores did on the A12 and A13, both of which were on TSMC 7NM. They are also both competitive with the single-core scores of the Ryzen Zen 2 or 3 cores, if not equivalent while being older architectures than AMD’s.
The M1’s Big [Firestorm] cores also consume less power and achieve more performance than the Zen 3 core.
It’s safe to say Apple’s architecture is largely superior, outright.
https://images.anandtech.com/doci/16226/spec2006_A14.png https://images.anandtech.com/doci/16226/spec2006_A14.png
- sudosysgen 5y agoI'm not talking about TDP when I talking about stuffing cores, I mean physical size. The M1 cores use more transistors. I'm sorry, but you're comparing power draw of a workstation "X" AMD chip with a laptop chip. It's simply not a honest comparison. You must compare the efficiency of mobile chip with a mobile chip. When you do that you find similar efficiency. I don't understand why no one is posting actual apples to apples comparison. Every time a comparison is posted its either comparing to a workstation chip to find power efficiency even if they're tuned to be power inefficient, or comparing to Intel CPUs only, etc... Laptop processors from AMD use less than half the power per core of workstation processors while sacrificing only a very small performance gain, due to the use of a different lithography for I/O. Apple's architecture is simply not superior. If it was, we wouldn't be making these contrived comparisons, and we wouldn't even be comparing 5nm chips to 7nm chips.
- leucineleprec0n 5y agoYou can compare Apple's 7NM chips, too, as I just said if you'd read. And guess what? The power consumption figures bode poorly for AMD. The IO die only adds like ~15W btw, yes, I'm aware it's on a GlobalFoundries node. Lastly, AMD's mobile chips throttle down to fairly low clocks and in AMD's case, low to modest performance when not plugged in, it's why you keep hearing tale of the great battery life on Zen 3 laptops.
- wmf 5y agoA fair comparison would probably be Ryzen 5300U vs M1 but I've never seen the 5300U in the wild. I expect M1X to do well against the 5900H when it comes out.
- sudosysgen 5y agoWouldn't the 5800U be an apt comparison? 25-30W is pretty much what an M1 in a mini will use.
- wmf 5y agoIt could be OK as long as you normalize the power limits (which most people can't do) and don't cherry-pick only single-threaded or multi-threaded tests.