My non-exacting Ryzen power consumption numbers

[CuriousMike]

I used a Kill-o-Watt P3 to measure wattage used at the wall.

I set my multiplier to 38/35/Auto -- and never touched the CPU voltage in the BIOS ( Auto )

I'm showing the numbers in multiplier order ( 3.8ghz/3.5ghz/Auto ).
The numbers are me eyeballing the Kill-o-Watt - Taking lows, what I think was average, and highs into consideration.

Desktop Idle
68/61/59 - average after 2 minutes waiting for Windows to settle

Dirt Rally Demo Mode
212/206/203 - average
246/238/217 - peak

Cinebench 2015 CPU
215/208/147 - average
217/213/163 - peak

The Cinebench surprised me because it was the biggest drop in power - probably 50% of time was 138w.

I did this purely as an exercise to see how inefficient would I be running the 38x multiplier "full time", and, in my mind, the penalty is very minor.

 

[imported_jjj]

Spotted this table a coupe of days ago with W per V and clocks

Source (in Russian) https://www.overclockers.ru/lab/832...-7-1800x-njuansy-raboty-i-razgon-pamyati.html

 

[Yuriman]

Thanks for your numbers. I enjoy threads like this. Idle seems kinda high, but my experience has been that it's more dependent upon motherboard than anything. Looks like "Auto" is probably tweaking voltage.

Point of reference, my Ivy quad idles at ~32w with everything set to stock, but when I start tweaking multipliers, it seems some power saving features go away because idle jumps up to ~40w. Loading it with the latest Prime95 (AVX), I get this:

Or, in other words, 4500mhz uses almost exactly 3x as much extra power (over idle) when loaded as 3500mhz, when the added voltage is taken into account.

Numbers for Cinebench are much lower.

 

[lixlax]

Just for reference: I upgraded from FX 8350 to R7 1700. During OCCT stress test the power usage dropped from ~250W to ~140W. Ofcourse not all of the savings are coming from the CPU itself but in my opinion its impressive nonetheless. Idle power went down from 74W to 59W.
What I changed were:
CPU: FX 8350> R7 1700
Motherboard: Gigabyte 990FXA-UD3> MSI B350 Tomahawk
RAM: 16GB DDR3> 16GB DDR4 (2 sticks in both cases)
CPU cooler: Kraken X41> Wraith spire

Rest of the system stayed the same. Ryzen seems to be very efficent below 3.5GHz