Hi Jean, What exactly do you mean by 'download my NVidia nForce 560 64 bit device'? Are you trying to download and install the drivers for this device? When I checked the manufacturer's website, I couldn't find any option to select 32 or 64 bit drivers. Moreover, there are no Windows 8 drivers for this device in the manufacturer's website. If you are trying to install the drivers for this device, i would suggest you to install the drivers in compatibility mode and check.

Download drivers for NVIDIA products including GeForce graphics cards, nForce motherboards, Quadro workstations, and more. Update your graphics card drivers today. GTX 10-Series Graphics Cards. NVIDIA >Download Drivers >nForce Driver. Release Date: 2011.05.02: Operating System: Windows 7 64-bit, Windows Vista 64-bit.

Refer to this link: Note: You can't run a 64 bit driver in a 32 bit Operating system. Hope this helps. 12 Prac Herkulesa Agatha Christie Ebook Chomikuj here. Please get back to us with more information for better assistance.