I just got another 560ti fto run in sli. But I am having a problem where once I Have a benchmark runnning for about 30seconds the screen starts flashing, like half- 3 quarters of the screen will flash tan or some other color for a split second and will keep doing this repeatedly. Has anyone else had this issue? What do I do to fix it? I was thinking I would try using an older driver but is there something else I should try?