The problem may not be strickly a DRIVER version problem.
Here is link for Nvidia drivers, going back to 12.41:
http://www.entcity.com/sub/drivers/nvidia.asp
Here is old article from Anand site, good for info:
http://www.anandtech.com/html/review_display.cfm?document=1058
When trying different drivers, make sure you're uninstalling completely, including manual deleting of files & reg entries. I uninstall from control panel/add/remove software, reboot immediately into safe mode, switch to generic vga driver, insure all traces of old driver are gone, finally install new driver of interest. Many drivers are better installed by finding the inf file in their appropriate folder, as opposed to using the auto exe process. It goes without saying, during this process, no OC of cpu or vid card, & all vid card utilities uninstalled, & anti-virus disabled, latest mouse drivers installed.
Find a driver that works, using lowest parameters, e.g., 16 bit, refresh rate 60, 640 screen, etc., as a starting point. (with those games you mentioned) This is important, so you can rule out other possible hardware/software problems, you may be having. If you cannot get the 23.11 drivers to work, with basic low parameters, solidly, then you need to look at the older drivers & other issues, e.g., mobo bios setup & quality of your Memory. Mem modules are common cause of many problems attributed to vid card drivers.
For your card, the older Nvidia drivers may be your best shot. Without more info about your sys & OS, this is what comes to mind. What is your card manu?