used 6 & 8 with W7 and had no problems at all. driver issues with the card i have (cos its so old) as i have the 64bit W7 (means i can utilise all 4gb of my DDR3 ram) but outside of that, bang on.

W7 installed in under 15 mins & the only driver i needed was the HDMI output. every other aspect of the laptop ran straight off W7 drivers.

when i can afford a better crad, i'll be jumpin back to W7 asap