Hulk
Diamond Member
- Oct 9, 1999
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Sadly, that slide is misleading. It already takes into account, that for the same MT performance more Zen4c cores are used and that they clock lower than a comparable Zen4 SKU. Looking at the V/f curve, Zen4c is quite disappointing IMHO.
I fully expect AMD to specialize their two cores more in the coming generations, where the c-cores show real efficiency improvements in terms of Work per Joule. This might only be the case for Integer.
All in all, in the client space the heterogenous approach makes sense to me due to Amdahl's law. Server space is different, because there it does not apply in the same way. There, many smaller cores might become the standard while big cores might only be used for special workloads and applications that get licensed by core count usage.
These types of promotional charts are generally terrible but this one sets a new low in my opinion. I mean we expect a lack of numerical values, no scale, and other missing parameters, but this one really shows nothing except efficiency is "better" and frequency is "lower." Oh yeah, and size is "smaller." Absolutely no useful information like what is the difference in frequency? How does efficiency compare at various iso power and iso frequency points?
So according to this chart Zen 4C is half the area of Zen 4, is that correct?
Frequency for 4C should be about 35% lower, correct?
Power efficiency about 50% better at some frequency/workload, correct?
If 4C is half the area, and 50% more efficient then that is quite impressive so I would expect AMD to just come out and state those numbers.