|"this is $70 and can't be returned to the computer store"|
Yikes, newegg sells 'em for $35 & recently had them for $15 after rebate.
"i installed the drivers from online, and it does not seem to be displaying anything"
The drivers are supposed to be installed AFTER the card is installed & recognized by the OS. Which video card did you have before this? Did you uninstall the old drivers, then remove the old card before installing the new one? If you were using integrated video, did you uninstall the drivers, then enter the BIOS, disable the onboard & change the display setting to the PCIe slot?
"the card dose work, just not displaying"
If it's not displaying, it doesn't work.