I have a Acer Aspire AM3970-EB12P anyone now what I can do to upgrade it (mostly just want to play the crew with good frame ra

Solution
If you have a under 300 watt power supply then the 750Ti is the best card for you.
If you have a 400 + watt power supply, Radeon R7 260X is as fast but cheaper. It needs more power than the 750 though.