Mission Impossible Or What? Sony VAIO/ Graphics Card/ Enable dual cards/ I have a old sony vaio VGN-AR770, which uses Nvidia GeForce GT 8600M video graphics card, that according to hardware diagnostic, has error. The screen shows artifacts, lines and randomly shuts down (see photos). I have eliminated other reasons such as overheating and applied thermal paste. Searching online and they all say the graphics card is dying and it cannot be replaced as it is soldered onto the motherboard. I then found a external video graphics card + blu ray player+ docking station Sony VGP-PRZ20B, originally not specific for my laptop, but works compatible with VGN-series models according to Sony. I tried to install the drivers for the VGP-PRZ20B from sony VPC-Z and SVZ series laptop(s), although the installation says completed, but somehow it is NOT detected. I tried the AMD website for drivers ( HD-7670M and HD-6650M), same thing, NOT detected. Then I read about a posting here on this forum, regarding the SLI mode (for Nvidia) / CrossFire mode (for AMD graphics card) must be enabled in order to have a dual video cards. Or work on BIOS to change the graphics switching policy from dynamic to static. ….whatever the approach will work? See link: http://forum.notebookreview.com/threads/how-to-modify-nvidia-drivers-for-vaio.553738/page-13 Since my Nvidia GeForce 8600M is dying, I am wondering is there a way I can enable the CrossFire mode so that my laptop can detect the external VGP-PRZ20B-that has AMD card inside, then disable the GeForce 8600M, so this way, I can use the VGP-PRZ20B as a substitute instead? ...Or is this “Mission Impossible” since my laptop does NOT have a physical button to switch from stamina to speed, nor my BIOs advanced menu has option to select graphics card. Thank you in advance. Here are the specs of my Sony VAIO VGN-AR770 Original OS Vista 32 bits (now windows 7 Pro 64 bits, clean installation) Intel Core2Dual 2.6 GHz RAM 4GB USB 3.0 ports added thru PC express card slot. Hard drive: Samsung SSD x2 Evo, with Intel RAID running RAID 0.