540M Monitoring?

I have Googled a bit but I normally get reviews and tests.

Bascially I am wanting to know when my Geforce GT 540M is actually under load, mainly because I ahve some taks that should be using the the GPU but I have heard of many cases where the GPU (not the 540M specifically) has to be manually told to aid in the game's graphics.

The game is Minecraft which for those who do not know is written in Java and uses OpenGL (I have been searching for a version number, it's probably really obvious yet I have not found it). In case it is not clear I want a program to monitor the GPU's activity...

My CPU is a i7-2760QM turboing between 2.4Ghz and 3.5Ghz.

Thanks in advanced.