Graphics Cards

[arberyoda]

The recommended system power for the RTX 3090 is 750 W with a graphics card power consumption of 350 W.
However, the recommended system power for the RX 6900 XT is 850 W with a graphics card power consumption of 300 W.
Why is the recommended system power set so high here, and do I have to worry about my 750 W?

[goodplay · Accepted solution]

Just a guess, but maybe they factored in AIB partner modded cards.

A number of Nv partner cards suggest 850W. 

[colesdav]

Possibly two reasons.

(1). Nvidia GPUs have current sensors to measure Total Board Power on their GPUs and they control it.
      AMD GPUs to date only measure and report GPU power.

(2). AMD have been promoting the use of "Rage Mode" which is simply increasing the power limit and the fan curve on the GPU.
The Power Slider on RX5700XT RX590, RX Vega series GPU is +50%. That is potentially lots of additional power. 

Note "Rage Mode" seems like "Marketing", and is likely nothing new from what I can tell.
The RX Vega 64 GPUs had similar Power Presets as follows:

Power Saver. 
Balanced.
Turbo.
Turbo set the power limit to +25% in that case.

Bye.

[rainingtacco]

AMD GPUs were still less efficient with 5700XT vs 2070 super, despite using lower node. We might expect similar situation where navi 2 is more power hungry than ampere with the same specs.