Product detailsModel :?AllIncluded Modified X-bracket?K610M ??1GBK1000M 2GBK1100M 2GBK2000M 2GBK2100M 2GBCompatible Models :For i ?A1311: 2010 2011A1312: 2009 2010 2011 ?HD6970Mneed to rep the X-bracket?Attention :???The A1311 and A1312 “Core 2 Duo” proceors from2009arenot ? ? ? ? ? ?compatiblewith these cards!?Before installingthese graphics cards, you need torep the X bracket(only when the previous graphics card isHD6970M) ,otherwise the graphics card will be short-circuited and damaged, andthe buyer will be responsiblefor the probl cad by this??Before installingthe graphics card, please High Sierrato update your BootROM to latest version??Ar installingthe graphics card insomei,there will be no startup screen, and the brightne will be slightly darker than before. These are normal phenomena,buyers who mind, please !These probl can be soed by installingOpenGL / Opencore??Before shment, wehave fed the VBIOSfor i andFully d??If you have any questions, pleasecontact usat any time.