Hello,
I am also from same field ! I would suggest you to get a quadro fx graphic card.
It takes less rendering time than others, and the best quality.
That means you'll get vRay photorealistic images in less time and best quality.
These graphic card are built for mainly rendering purpose. Games like NFS Run and COD MW4 are not possible in it. But your games will run perfectly, Also in animation industry all studios are using nVidea Quadro Fx.
Quadro 380 will suit to your budget. Thats my openion.
Thanks.
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See my Rig thread
I'll clear one thing for you. If you are comparing a a Fermi-based nVidia consumer GPU (GTX 400/500) with a Fermi-based Quadro, Fermi-based Quadro will be much much faster. Reason? nVidia has crippled the 3ds Max/Maya viewport performance of the consumer driver. So, that people go for Quadro and nVidia makes a lot more $$$$$$.
GTX series and Quadro are essentially the same chip. Ever wondered?
AMD gives FirePro (professional) and Radeon (consumer). Radeon's performance in Maya/3ds Max Viewports might be slightly low compared to FirePro, but they aren't crippled by AMD in any sense. it's just that FirePro drivers are more stable and fine tuned for renderring apps.
My suggestion for you, instead of wasting money on a Quadro, pick up an AMD Radeon graphic card.
Heck, pick up a FirePro instead of Quadro if you are too "professional" tag conscious. Quadros are only better in price tags which don't matter. FirePro V7900 is almost a Quadro 5000. and HD 6950 is almost a V7900 minus a stable "professional" driver.
Every thing said and done, AMD graphic cards can power 4 monitors at once - more work space. nVidia (whether GTX or Quadro) can only power two in general.
Thanks buddy !
It's the suggestion is what I am waiting for.....which don't confuse me and more practical.
Ok, it's looks like a roller-coaster ride of the opinions but can't help with it...

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I don't willing to take a risk to OC my new rig and hence I think it's better to go with
i7 2600 instead of
K version of it.
Can anyone suggest me good motherboard for
i7 2600 for good stability and performance.Should I still go for
Z68 or not? Then which one ?
I'm replying in reference to your e-mail.
No. Go for i7-2600K only.
My suggestion is this:
Intel i7-2600K
Asus P8Z68-V Gen 3
Why K? Simply because you'll be bale to overclock it after two-three years down the line if you think it isn't fast enough any more. For a difference of Rs. 1500, it's better to get the K version only. To even it out, let's be practical and spend less on the cabinet. NZXT Gamma for Rs. 2200 is fine.

Hard Disk prices are very high at the moment, so buying anything more than 500 GB doesn't make sense for me.
Differences between all chipsets of Intel are explained here -
*www.thinkdigit.com/forum/cpu-mothe...sandy-bridge-lga-1155-motherboard-thread.html
I'll be honest, multi-threaded performance of FX-8120 is between i5-2500K and i7-2600K. I waited for FX-8120 to get launched and didn't buy it because of its power consumption. Power consumption will make a difference if you are going to keep your processor stressed for long periods. FX-8120 a good processor for its price though. But AMD hasn't got their new architecture completely right.
Spending extra on i7-2600K is justified over i5-2500K for your purpose imho.
Second, if you want to get a graphic card, buy AMD HD 7850/7870 after they come in India and prices get settled. GPU will be needed when you run Viewports in Maya/3ds max.