<105W over 13 results

By: blue (blue.delete@this.blue.com), March 18, 2017 8:02 pm
Room: Moderated Discussions
juanrga (no.delete@this.juanrga.com) on March 18, 2017 12:32 pm wrote:
> blue (blue.delete@this.blue.com) on March 16, 2017 9:22 pm wrote:
>
> > 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).
> >
>
> Yeah, before launch TDP did matter a lot of and forums, including this, were
> filled with BS about how much more efficient Ryzen was compared to Broadwell.
>
> Now that reviews killed all the pre-launch hype and BS marketing, then now TDP doesn't matter anymore.
>
> In any case, let me emphasize again that the main point is about how AMD tried
> to fool us with marketing TDP figures that don't represent the real TDP.
>
> We know the real TDP of the 1800X is ~130W, not 95W. And CanardPC has
> just confirmed that the real TDP of the 1700 model is 90W not 65W.
>
> https://twitter.com/CPCHardware/status/843109717610287105

Why do you insist on using ~130W? It's 128W max.

And most reviews I have seen show about a 120-130W difference from idle to CPU only load for the system, which should be in the 100-115W range depending on the PSU rating.

More than 95W? Yes. Absolutely. 130W? Absolutely not.

a bunch of numbers from various reviews:
1@ direct CPU draw, ~112W draw max at stock.
13@ wall difference between idle and CPU load:
125.5W
126W
109.5W
125W
97W
125W
128W
121W
110W
176W
139W
114W
126W


Seems to me most of the difference in system draw is 120-130W from the wall, sans about 20%, or about 100-110W.
Taking the average of the 13 system results with 85% efficency PSU leads to about 106W.
Throwing out the insane 176W and low 97W figures gives 104.5W at 85% PSU efficency.
102.5W with 97W figure included and 176W not included.

So, basically <105W for the CPU from idle to load. Which could be even less if PSU efficency was lower. And most reviewers tend to use overkill PSUs. So I think that <100W maybe true on average.
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