80 percent in worked in adobe photoshop cs6
rest 20 percent in adobe lightroom, adobe after effect, acd see, camera raw software and cinema 4d etc.
The way I see it:
1) Adobe Photoshop CS6: Any Graphics card with OpenCL support.
2) Adobe Lightroom: Recommended; midrange graphics card for acceleration
3) Adobe After Effect: Needs OpenGL/CUDA. Only Nvidia cards support CUDA
4) ACDSee and Camera Raw software: They don't need graphics cards... they need a good processor and secondary memory...
5) Cinema 4D : Needs a strong processor for rendering. GPU only used by external rendering engines like Octane/Mental-Ray. You have an average/below average processor, and for the budget of 15,000 INR, you can only get an average/below average graphics card for the external rendering engines.
Advice:
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No offense to you, but it seems that you are a newbie, and don't yet know what and where to apply your graphics creativity. If this is the case, then read on. otherwise skip to last section.
If you are a newbie, spend your 15,000 bucks on the "best" graphics card this money can buy. On Flipkart.com and theitdepot.com, I see Nvidia 560, AMD 7850 1 GB for this cost. See some offline shops too. these are good purchase. Stretch your budget by another 5,000 INR and you should buy either the NVIDIA 660Ti or AMD 7850 2 GB (or 7950 if you can find the deal).
Last Section:
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I recommend you spend whatever money on a CUDA capable NVIDIA card. That is what'll get you through all the rendering, should you use GPU acceleration. Here I recommend you make investments on NVIDIA 560 atleast. Even better if you can get a 570, 580 or a Quadro. The newest 6xx series from Nvidia is weaker with CUDA and AMD does not support CUDA anyways.