Got a feeling on that one. Your specs are just fair for gaming at higher levels, heavier graphics card might help a bit. But the main issue is likely the power supply E machines usually incorporate about a 250 watt supply, it really needs more than that. Go to your local electronics box store and get something around 500 watts (they aren't expensive and are easy to retrofit). It sounds like the supply isn't up to the task you need to go bigger. Good luck!!