I'm considering having a system build solely for rendering for cycles (as kind of a single PC renderfarm). Since the GPUs would be most important here, I plan on having it build around those. I was wondering what would be the best GPU to go for? As far as I can find, 2 gtx 580's seem to be the best option, while two 560 ti's give more bang for the buck. Any chance newer videocards work as well? (600+series?)
closed as too broad by Aldrik, CharlesL, ideasman42, A Wild RolandiXor Jun 29 '13 at 5:19
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
Here's a spreadsheet that collates data from many users running the same benchmark scene. The thread with active discussion and a copy of the scene is at BlenderArtists, This is the best we can do without relying on opinion.
Decide for yourself which gfx card makes sense.
Note: Different OS's, drivers and versions of Blender, can all significantly change render times. So you'll need to take that into consideration when comparing benchmarks.