I'm not sure you have realistic expectations for a single 1080... not to mention what hardware you are running.
 
Perhaps some reading up would make you feel alot better about the framerates you -are- getting
http://www.guru3d.com/articles_pages/deus_ex_mankind_divided_pc_graphics_performance_benchmark_review,9.html
 
With careful attention to the rendering details for this extremely complex title and its settings, you should be quite happy with the end results
*as always, settings/framerate testing should be done at STOCK -before- attempting any overclocks

Well that's the thing about this projector is it actually understands a 4k resolution and will output. It simply has it'd own tricks in how it does it and isn't like a previous fake 4k that was on the market that really sucked.

But it's like any other setup, you simply have to fine tune things and some games are gonna be picky.

Like I have dark souls 3 running with 4k resolution in game and it looks stunning, absolutely stunning, holds 60 frames also but deus ex is not being as agreeable.

Like the above post tho, getting 40 to 50 frames at 4k resolution isnf bad, and it really isn't... I was trying for that 60 frames like I was able to get in other games but deus ex lighting effects and what not are pretty demanding I'm finding out.

So what I did do tho last night was ya, drop deus ex to 1080p and cranked up msaa and other things and it looks stunning while running at 60 frames, plus my 4k enhancements this projector does takes it to a whole new level. Best 3000 bucks I ever spent.

It's pixel shifting technology is amazing, gives a person a lot of options when using it