Screen lag on 2013 Mac Pro with LG Monitor

I have a new Mac Pro (Late 2013)  with64 gigs of RAM and a 512 HD which isn't even 1/5th full. I have a new LG 34UM95 21:9 monitor for it.  When I drag files to the trash, I hear the sound of the files going in, but the icons take about 10 seconds before they move from the desktop (or any folder) to the trash.  Is this an OS issue, an issue with non Apple monitor support or something else?
I have not installed the Monitor's "Drivers" because, besides this issue, the monitor works fine.
Any insight would be great.
Chris

The warranty entitles you to complimentary phone support for the first 90 days of ownership.
If you bought the product in the U.S. directly from Apple (not from a reseller), you have 14 days from the date of delivery in which to exchange or return it for a refund. In other countries, the return policy may be different. If you bought from a reseller, its return policy applies.

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