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Ok i had a Medion (German manufacturer) X7817 MS-1762 its like GT70 ONS Barebone and a HD 7970M left.- You also can take a HD 8970M it has the same layout and you`ll get it low cost at Ebay and it has high performance . Both have DX12 support HD 7970M is like GTX870M In picture 1 you can see on left site original Nvidia GTX670M comes with it and on the other site the HD 7970M. Thermalpads must be set as in the photo on HD7970M! In picture 2 you can see what you have to do- the red area must be flat- one layer- the rest can stay as it is! You can see how optimal the plate is for the ATI Chip in middle! In picture 3 you can see the copper layer that you have to fit in. Thats all In picture 4 you can see test results with normal settings under Windows10 CPU i7-3610QM - no overclocking yet!- Under Windows7 it will be 200 to 300 points higher because of better driver and faster system! There are MSI Vbios on Techpowerup for flashing https://www.techpowerup.com/vgabios/index.php?architecture=&manufacturer=&model=HD+7970M&interface=&memType=&memSize=