@ tankengine
your problem sounds more like a powersupply problem tbh...
if your motherboard has the PCI-E socket necessary to install the graphics card into then it should support the card type. At least enough to boot up and allow you to download and install the driver.. which would lead me to thinking its a powersupply issue and that would mean that you need a better powersupply to power your pc.
also it looks like from your spec that you would need to upgrade the processor to play the game as well.
to see where your processor comes heres a link
AMD Processors for Desktops: AMD Phenom?, AMD Athlon? FX, AMD Athlon? X2 Dual-Core, AMD Athlon?, and AMD Sempron? Processor
hope that helps
madman32