Got a Nvidia 4k card in the Lenovo S30 I have hooked up to the big system. To tell the truth, the only 4K sources I have are YouTube videos. Pretty damn spectacular. Can't remember exactly what card it is though. Bought it used and replaced the heat sink compound.I parted out the Ivy Bridge desktop last year, rarely got used! I just got a used high spec Thinkpad T480. It’ll render drone maps, run 3D printer slicing software, and shitpost just fine…..but it chokes on 4K video. Gotta see what that’s about