A bit expensive, but it works perfectly on an MSI GT780DXR (mine is actually a rebranded MS-1761). You need to modify your heatsink first with a rotary tool and add a few thermal pads, but it's pretty simple. Didn't need any modified drivers or anything.
Installed perfectly in my MSI GT780dxr laptop with just a little heat sink modification. Also you have to use modded drivers to install working updated drivers unless you flash the v-bios to an MSI 6GB bios. Even runs cooler than the origional GTX570m card. Thanks