|You need to post the make/model of your motherboard & it would help to know your power supply specs too. Here's the Spore system requirements, video cards are listed:|
Besides the video card, notice that you need more RAM. 320MB isn't enough to run XP decently anyway, let alone play games with it. 512MB should be considered the minimum for an XP system. Notice the minimum CPU requirement as well - 2.0GHz P4? I doubt you're going to be able to run it on that old PC.