Video Card Temperature Monitoring Program

Does anyone know how to monitor the temperature on a video card, I don't have any kind of temp reader. I am hoping that the card itself has temp sensors and there is some kind of software that can read it. Any help would be greatly appreciated. And if it helps i am running a Leadtek Geforce 4 ti 4200 8X AGP 128MB card. I have it OC'd to 280 MHZ core, and 580 MHz mem while gaming using Powerstrip. When not gaming I down clock it to 209 MHz core and 429 MHz mem to try and help keep it cool, and to (hopefully) make it last longer. I know i need an upgrade but can't afford it right now.

haven't seen anything in the driver panel, but what i did find is a program that i think is from leadtek, called winfox 2.0. It shows GPU temp, mem temp, voltages, fan speed, and has a ton of other features. I can even use it to OC my GPU, but i like Powerstrip better.

Thanks for the response though.