Windows 7 Geforce 9650GT

Having some issues with finding a driver. Win 7 does not have a driver that it detects from nvidia.... So i downloaded the 64bit vista driver for it off the nvidia website and it seems to work fine. However, noticeable fps drop on Crysis vs same thing in vista 32 bit... so it works but is not optimized. Maybe in the near future there will be drivers for high end nvidia cards?