Gaming GPUs Graphics Reviews

Back on top?! AMD Radeon RX 6800 and RX 6800 XT Review – Feel the same, but with big differences in detail

Let’s start with the individual loads and the respective resulting power consumption of both new Radeon cards. The Radeon RX 6800 XT is well in the race with 10 watts in idle, whereby about 7 watts are allotted to the external PCIe connections and about 3 watts to the motherboard. In gaming, you almost reach the maximum 300 watts and if you use the offered OC possibilities of the Wattman, it is the maximum 320 watts I predicted.

With external tools you can also reach up to 345 watts, but the performance doesn’t scale with the supplied power.  The normal user will never reach this level anyway, because exactly this part above 300 watts is the responsibility of the board partners.

The RX 6800 is much more economical as it works closer to the sweet spot. This card is clearly more frugal with a maximum of just under 235 watts, but could also be driven to almost 290 watts by overclocking and suitable tools. Only he won’t need this. You won’t be able to reach or even overtake an RX 6800 XT through the OC, AMD has already taken precautions.

As a special service I have also recorded the respective single voltages VDDCR_GFX, VDDCR_SOC and VDDCI_MEM, because these values differ significantly from what e.g. GPU-Z outputs as sensor value. Specifications and real values are in reality always 2 pairs of shoes. Even if you leave the Wattman at 1.15 volts or even tweak it to 1.25 volts, the VDDC_GFX is limited to 1.15 volts anyway and as a default value is never even reached, no matter what you set.

This doesn’t look any different in the Radeon RX 6800, by the way, as the following graphic proves:

Compliance with standards at the motherboard slot (PEG)

Let’s now move on to the load on the motherboard slot, whose load is specified by the PCI SIG as 5.5 amps. This results in a maximum power of 66 watts at 12 volts. You can see very clearly that exactly 2.8 amps are reached under full load, which is absolutely exemplary. This applies to both the Radeon RX 6800 XT…


… as well as for the smaller RX 6800. So there is still plenty of room for manoeuvre here.


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About the author

Igor Wallossek

Editor-in-chief and name-giver of igor'sLAB as the content successor of Tom's Hardware Germany, whose license was returned in June 2019 in order to better meet the qualitative demands of web content and challenges of new media such as YouTube with its own channel.

Computer nerd since 1983, audio freak since 1979 and pretty much open to anything with a plug or battery for over 50 years.

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