Flight sims for benchmarks?

[Twisted Kid]

Ok so i love flight sim games, been using them since Fs2000 and now running Xplane 10 with every single drop of payware to make it as real as it gets and have over 22000 hours in 737's, 747's, A320's, A380's etc.
My gaming rig [email protected] Titan X on a 4k.

I have never known any "game/sim" to push a gpu and cpu to its max!
Why flight sims are not used in benchmarks is a mystery to me, i play the latest games at max most of the time and none of them use anything like the same resources, example, X-plane 10 maxed out @ 1080p will push my cpu to only 17% less stress than using burn test yet 99% of games used dont even bring it to 40%.

Also id like to add that these sim seem to use far more cores than most games that only make use of 2-4 cores, mates that own 5960x's that also sim hard find that almost all the cores are used.

Thoughts on this and is it due to the way X-plane utilities physX?

 

[Twisted Kid]

If that's the case why does my Titan X use 7.2gb? Show me another game that pulls that from the memory and pushing my Gpu on air @220 on clock and@530 on memory to it max.