Hello. I have a Mac Pro 4,1. 10gb ram. I got the cheapest graphics card from Apple: NVIDIA GeForce GT 120: Chipset Model: NVIDIA GeForce GT 120 Type: GPU Bus: PCIe Slot: Slot-1 PCIe Lane Width: x16 VRAM (Total): 512 MB On the understanding that I would buy aftermarket (not from apple store). I'm struggling to find a compatible card that is a good step up, but isn't the FX4000! http://store.apple.com/uk/product/TW386ZM/A?fnode=MTY1NDA5OQ&mco=MTE0MzgzMzQ&s=priceHL Can anyone suggest anything? My computer is often slow when working with big documents in indesign, big images and so forth - it never uses all memory, it sometimes uses all of one CPU (but hey, that's life). I'm running a 30" display. Would love to know your suggestions or experiences with cards that would improve performance and are compatible. That aren't £1500.