Amazon.com: TOPOU Mainboard K4000M K4000 GDDR5 4GB Video Graphics Card N14E-Q3-A2 Fit for M6600 M6700 M6800 Fit for HP 8740W 8760W 8770W Laptop Motherboard : Electronics
Original K4000M K4000 GDDR5 4GB Video Graphics Card N14E-Q3-A2 For Dell M6600 M6700 M6800 for HP 8740W 8760W 8770W for iMac - AliExpress