Easy Miner showing zero work, no devices shown
So if you read the fine print on "Easy Miner", you can only use the software with their hardware devices in "out-of-the-box" mode (direct download --> run) (Disclaimer: I have a Jalapeno 5 GH/s miner, this shows up as a valid device. My GPU does not, however). 
See this thread about how to configure GPU mining. I believe it's in the settings, plus you need to set a bunch of flags to get the miner to recognize your GPU settings.

You would most likely be better off using CGminer / BFGminer, if you want to go the GPU mining route, however as the comment says, you're unlikely to get any real yields from any amount of GPUs, as they are just not as efficient as ASICs or FPGAs (see this for a good comparison of dedicated hardware versus graphics cards).