Hello [URL] download these directly from nvidia.. they are for win7 x64. (you didn't mention if you have a 64bit or 32bit os installed)
Hi, there, Please, help me here, I've just replaced my main hdd on my precision 670, I have the OS Win 7 Ultimate 64-bit. And, I am having problems with the video card driver.  When I install either the windows update driver, or the driver that I got from a driver´s site, I get blue screen.  Many thanks, Best regards. Jaime R.  
Driver for NVIDIA Quadro FX3400/4400