Visualize extreme unstable

I´ve a new machine with fresh installation,driver up-to-date, but Visualize:

- recognized the second Graphic-Card, but didn´t use it

- switching after loading a project directly to accurate mode doesn´t work.I´ve to activate fast first than accurate Mode

- after awhile i get in fast mode this failure: An internal rendering error occured

- and now Vis chrashes directly showing this message and destroys the project

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SolidworksSolidworks Visualize