You can always upgrade the card later, as long as your PC has a big enough power supply. I suggest you get the fastest processor you can afford, after carefully checking the benchmark results, and settle for the best Nvidia graphics card you can get. A high-end graphics card such as Nvidia's GeForce 580 – designed to render games such as Battlefield 3 in real time - would take most of your budget. You should consider which of these is most important to you, though I suspect it doesn't make any practical difference. (If you were making a Pixar-style movie, you'd do the rendering separately on banks of servers, ie a renderfarm.) Viewing is, by contrast, a graphics-intensive process, where the faster the graphics card the better. The rendering process is compute-intensive, so the faster the processor, and the more cores it has, the better. Running software such as Blender and Adobe After Effects usually involves two different activities: rendering and viewing. In all cases, you also need a graphics card that supports OpenGL, and as much graphics memory as possible. However, the specification for a production machine – the sort of professional rig you have in mind – includes a multi-core processor and 8-16GB of memory. Most mainstream desktop PCs are now better than that. Blender, now open source, still runs on a single-core 1GHz PC with only 512MB of memory, according to the website, and for "good specs" it recommends a 2GHz dual core processor with 2GB of memory. Still, we used to render graphics and create animations a decade ago – possibly using Blender – when PCs were much less powerful than they are today. That could mean buying a refurbished PC, shopping on eBay, or assembling your own machine, though I wouldn't really recommend that if you have no previous experience. The usual adage in computing is: "Fast, cheap, good: choose any two." It's easy to spend £2,500 on a PC for 3D modelling and animation, so you will appreciate that £500 is a challenge. I know that to do all this, I'll need to spend a decent amount, but I'm working with a £400-500 budget. I am learning how to use Blender, and I hope to add Unity 3D for game designing, Adobe After Effects and Premiere. I want to buy a desktop PC to do 3D modelling and rendering.
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