Thanks to all those that replied to this thread who are in the know GFX speaking, I was well out of date..
I've have learned a lot already... my computer can run Civ5 ok (I hope), however my brother has a Dell machine, Duel Core E5400 2.7Ghz/2GB DDR3
But with a GMA X4500 graphics card? Looking at the minimum specs, I take it this will cripple the games performance?
He can have my Geforce 7900GS out of one (of two) computers of mine. Leaving me a Geforce 260 in one and no GFX card in the other.
One is a Core 2 duo (2.6 Ghz/4GB), the other an equally old quad core (Q9950? 2.8Ghz/4GB). The quad core is used for work - the graphics don't need to be that good, the GS7900 is from this one.
So I whats a good cheap GFX nvidia card now that can match - or better the GS 7900? (for about 100USD or 70GBP)....
Failing that; it's rebuild time, use 2 core machine for work and get;
GTX460
Seems cheaper than normal, slow memory or CPU?