Scourge of War Boards

Already three or four times I had to install OS winndows.
My HD has come to an end.
I would like some advice from you playing the same game I have.
My current video card is an ATI Radeon 4870 PCI-E, the first generation, it struggled a little when there were many units on the map.
What video card you have?
Thanks, greetings from Italy.

I have a nvidia gtx560 - 1Gb ram. im pretty happy with it, i had to buy it when my 8800GTX sat down.
My processor is a dual core E6600 2.4ghz, 5 years old at this stage and it slows me down, plus i only have 4gb Ram.