Real View keeps turning Grey

Good Morning everyone,

i seem to have an issue with my real view keeps turning my assembly to this grey looking thing, i have been looking through the forums and a few people said it was because of large assembly mode (not the case for me)

i have a K5000 graphics card, 32 gig of ram, i7-4930k cpu, all with the latest drivers (computer is only 3 weeks old).

anyone have any sugestions?

Thanks

Damien

SolidworksGeneral