Comes renderer can not call 2080TI, on the Internet to find a GPU renderer Redshift.
The results rendered watermark, so as to find a solution.
Of 2-step
The first step: Quick Add in the render settings, AOVS the tab, select Beauty, under any Options Name a name, such as iBeauty.
Step Two: In the top menu bar Redshift > Redshiftrender Viewer, select just the new IPR inside Beauty, so there is no rendering the watermark.
PS: This version 2.6.41 to address multiple cards can have a watermark, and watermark a single card in question.