Power matters servers, not consumer

By: blue (blue.delete@this.blue.com), March 16, 2017 9:22 pm
Room: Moderated Discussions
TL;DR: AMD's TPD is not power draw for consumer parts. AMD has ability to limit package power for whole die. Consumers should want higher power for more performance for desktop usage. Servers will almost certainly be able to lock per package power on Zen.




Okay, let's try to explain what TPD is used for by AMD.

How powerful the cooler needs to be to support the CPU.

The CPU, as stated by AMD, can exceed the "TPD" IF the cooler allows enough cooling.

If I open up an application which demands maximum performance, as a regular consumer, I don't care about the extra power for the performance it gives me.

Based on The Stilt's posts, Ryzen does have a robust system which can hardlimited the power of the whole die, and server partners will likely (read: 99.9%) have access to these. And for the clockspeeds in which Ryzen needs to hit to be competitive with Broadwell and Skylake in pref/watt and peak performance it looks like it can.

Without knowing how good a quality CPU the Stilt has it is hard to say if it will nearly always be better or worse. But it will certainly have some good bins which will be as good if not better.

The only problem here is AMD did not make the TPD explanation they post easily available to consumers. They only (afaik) have it in the reviewers guide, or in places you would have to search very actively to find.


Overall, this ranting about TPD is pointless. For most (all?) consumers it is beneficial on desktop/plugged in laptops. For Server players it is a nonissue as they will be able to control the hardpower limited on the chips (or at least MCMs) themselves. And will choose to purchase (or not) Zen architecture products based on if that pref/watt clockspeed*IPC provides enough ST and/or MT performance compared to Intel (and possibly the upcoming ARM competition).




BTW, AMD can disable individual cores in CCX. :P
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