Way too high. Something appears wrong, or it's not reporting properly.
More important questions:
1) What is the GPU usage in games (VSYNC OFF) and using tools like Unigine Valley to benchmark?
- should be over 90% for most benchmarks, and for games with no current CPU bottleneck (AND the frequency should be as expected at the same time for the reason discussed above)
2) Any fan noise, or performance issues?
3) I'm showing on my GTX1080:
a) 4% power usage
b) 400MHz GPU
c) GPU usage is between 0% and 10% (it shows 0% at times but obviously that can't be true... again not sure what's being monitored)
So... I'm not sure what's wrong. It seems very unlikely it's using that much power though perhaps because it's a HYBRID solution the software isn't reporting this properly?
UPDATE:
*Look at the GPU frequency. In idle it should be throttling down under 600MHz (not sure about GTX980Ti). Also look at "GPU usage" value. You can't be using 50% power if the GPU frequency and usage is low.
The more I think about it the more I think it's a reporting error.