I know it be not RTM yet , but if you be look to use this on Windows 8 , I would wait . I try the supply driver as well as a newer driver on they website and both just set my machine into a bluescreen reboot loop . I set up a support ticket with they , I will update with the result , but base on my google search , the same thing happen when Windows 7 come out and they just blow it off until they be ready to release a driver . I do not want to give 2 star as I think the item be probably good for support configuration , but I also can not give it a high rating since it be provide I no value . I wish I could have just leave the rating blank and just give feedback . \* Update after a week or so of usage . \* so , I format my laptop and go back to Windows 7 to try this in a support environment . there be some pretty big issue when go back and forth between sleep mode\/docked and undock that all go away if I uninstall the driver for this , but cause a bunch small issue when this be in install . it often leave I at a black screen and I have to open and reclose the laptop to get video , or if the card isnt plug in when I dock , it seem to try to capture one of the other monitor on the dock -lrb- there be 2 -rrb- and cause artifact , need a undock and redock . I ask StarTech the process to get a refund as it be just too much to deal with on a computer I actually use for work and they tell I to reach out to Amazon -lrb- fail -rrb- . I be not go to go through all of the drama of fight for a refund over such a trivial amount , but I definitely wont be recommend this to anyone , which be unfortunate as the other developer -lrb- I write software -rrb- where I work be very interested in pick one up if it work .