A look at the hardware
As said before, Cycles is a pretty heavy render engine and needs the appropriate hardware to work correctly. Moreover, it gives us the possibility to use the power of modern graphic cards to speed up render time. Not every card will work with Cycles, so I thought it'd be worth it to say a couple of words about this topic.
Cycles can render on both CPU and GPU, even if at the moment it cannot use them at the same time. That being said, GPU render is faster than CPU (at least for the same amount of money spent on these two items), but the first one presents some limitations.
First of all, GPU rendering with Cycles works only with CUDA at the moment. CUDA is a proprietary technology of NVIDIA. This means that at the current state ...