I have just installed Dead Island on my computer and have quite a bit of fps problems. I can't give an exact number on the fps scale because I don't know where to find an fps reader on the game, but it is certainly lower than I would expect. all of the cutscenes and loading screens are fine, but once gameplay is initiated, the fps goes to ***. Here's what I have system wise:
-NVIDIA GeForce 8400 GS
-64-bit Windows Vista Home Premium Service Pack 2
-Pentium DualCore E5300@2.60ghz
-6.00 GB RAM
your video card does not even meet the minimum requirements. As said above, even if your PC just meets the minimum, it will still run crap and you will have to turn all the details and resolution down to the lowest.