I didn't monitor so far the TDP of the amd (can't in MSI AB just realise I can do that with HWinfo), but with a card running at 60°C it shouldn't be high.
For some reason, everybody seems to think that the R9 290x is a very power hungry card, but it is rated 250W.
Clearly, past generation amd may have been huge electron suckers but that doesn't seem to be the case for this one