In reality, the gpu of a pc is MOST important for gaming. You may be able to run it at the lowest settings. Here is a handy little website to see if your pc can run them
http://www.systemrequirementslab.com/cyri
It's completely safe and easy to use. If you barely pass the minimum and fail the recommended, then I would give them a miss as these minimum specs often are VERY misleading and tell you if you can RUN the game but at very poor fps. If you pass the recommended then go ahead!
Do you have these games yet?
Just a quick note: If you seem to fail on the cpu and gpu side of things then check the following things:
GPU: check if you passed the Pixel Shader version, Vertex Shader version and Dedicated Video RAM sections under the gpu heading, if you passed then your gpu is good to go!