28 months ago
I finally found my electric usage meter, and wanted to give some info on estimated vs. actual power usage for those who are also interested. Note that this is only one data point out of many; I'm sure there could still be enough variation depending on a number variables.
I figured my current build is pretty close/similar to the 'average' enthusiast/gaming/etc rig:
- Ryzen 5 1600X 3.6 GHz base, OCed to 3.9 GHz, stock 1.375 Vcore
- NZXT Kraken X61 with two extra 140mm fans
- Single XFX RX 580 8 GB, no OC
- Some common peripherals
- 32 GB DDR4 RAM (reasonable amount is probably 16 GB, but either way)
- No extra LED lights/strips
Full build: https://pcpartpicker.com/list/tFt37h
I measured some common scenarios:
Powered Off: about 1.2 W
In Hibernation: about 1.5 W
Idle with low fans: avg 77 W, max peak of 80 W
Idle with max fans: avg 95 W, max peak of 100 W
Typical web browsing with low fans: avg 98 W, peaks of 101 W
Warframe (Max Settings): avg 110 to 150 W, peaks of 210 W
Cinebench (GPU): avg 145 W, max peak of 170 W
Cinebench (CPU): avg 188 W, max peak of 190 W
prime95 only (w/ max fans): avg 218 W, max peak of 220 W
Furmark only (w/ max fans): avg 308 W, max peak of 311 W
3D Mark TimeSpy (CPU and GPU): avg 310, max peak of 315 W
prime95 and Furmark together (w/ max fans): avg 432 W, max peak of 435 W
From vagabond139, those power consumption values still take about a 0.9x multiplier because of efficiency, so for this system, 435 x 0.9 = 392 W max that is actually used by the system, and the rest is wasted as heat: https://en.wikipedia.org/wiki/80_Plus
So for either estimate, they seem pretty close to the actual max draw. But even if you don't plan to upgrade your system, I'd still give at least a 100 W buffer, even more so since PSUs are optimal at roughly 40-60% load (don't know the exact numbers, just from what I've seen). And if your build has one video card, and you might want to add a second card or other stuff later on, that's another consideration.
If anyone else has their own numbers they'd want to add, feel free.
Note this is a system with only one RX 580 card, so a 1080 or two cards will of course have a higher draw. Also if you get into higher overclocks that change the CPU Vcore and/or GPU core voltage, that can definitely increase it further.