777 Engine and Tail turn black

[RFarmah 1]

I’ve been using the PMDG 777 for about three years now, and recently I purchased FTX Global. Now I am running into the problem of engines and the tail turning back. For example, I did a flight from Dubai to Paris, was able to land, and after five minutes from departures, the tail and engines turned black, with some parts of the wings. I know this is a common problem when running out of video memory, but many of my settings are fairly reserved. I’ll upload a picture of my settings. 

 

Any guidance here would be greatly appreciated! 

Thanks,

Rajan F

 

Settings image:

https://drive.google.com/file/d/1qvX4XoaoaCIuO1w4oHwQx6fytzXK369h/view?usp=drivesdk