Software to read my GPU's temp????

Hi, can anyone link me to some software that will read my GPU's temp as i'm gonna overclock it and need to know when enough is enough, lol.

Thanks.

if you're overclocking your GPU you're best to see when it starts causing screen artifacts not by how hot it is. Motherboard Monitor might be able to read the GPU temp if it has a sensor but it really depends on whether the plugin has been coded & whether your GPU has a sensor on it.
Also it would help to specifiy which card you have or even if its a Radeon or GeForce based card.
I use ATiTool for overclocking my Radeon. It is very easy to use & has some very good features (like Find Max Core & Max RAM speeds) and it has a built in Artifact Tester.

Hi, ok here are the specs.

GeForce FX 5900ZT 128MB
Asus K8V SE Deluxe

the BIOS does not report GPU temp... only mobo and CPU temp.

Also I know about looking out for artifacts and stuff but I really need to know the temp as I killed my TI 4600 2 years ago by overclocking much too high. ROFL!