I use Illustrator CC 2018 and my OS is Win10 64bit.
Graphic Card is NVIDIA GeForce GTX 1050Ti.
My illustrator have a problem comes up.
The problem is when i drawing or moved object and that gray is what breaks my screen.(like a images.)
I checked GPU Performance of illustrator Options.
but, This problem is over and over again!
Could you send me an email with the details?
unfortunately we have not been able to recreate the problem on our machine with similar configuration.
Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.
some additional suggestion: You may want to keep your memory free by reducing the number of undoes – last 200 edits in memory may be too much of data in memory that you may not need ever.
Egor Chistyakov commented
Look closely at your document caption/tab. It says that GPU preview is still on. You should apply changes, I guess. If it doesn't work, try to change preview mode in View menu.