mihir.khatwani said:If the rig is for gaming then the Core i7 2600k is pointless I would go with the Core i52500k and save some money.
As far as the GPU is concerned the GTX 580 is just 10-14% faster than the GX 570 so the GTX 570 is the way to go.
The HD6970 would be completely ridiculous in front of the GTX570 since the GTX 570 trumps it at every resolution till 1920x1200 and loses on the higher resolutions like the 2560x1600 but that because of the the lower VRAM compared to the HD6970.
Going with a multi-GPU config for a new build is completely ridiculous since when a single capable GPU is available which won't slack then why go for a multi-GPU config.
I have already purchased the i7 2600k and IMO it is far better to go for an i7 than an i5 for a more robust build. 10-15% performance difference is what separates the mid-range GPUs from the high-end ones. With any high-end GPU the VFM goes down & you are simply paying the extra 30-50% price for just staying on the cutting edge. I understand that now days with the console bias practically any mid-high end card can play games comfortably @ 1080p but often the extra muscle that multi-gpu configs provide ends up giving a much smoother maxed out gaming experience on demanding titles specially for multi-monitor gaming.
ALPHA17 said:^^
overall the benchmarks are similar for both cards but nVidia optimized games Physx based games are biased towards the nVidia GTX 570, in rest the AMD card leads decisevely and I feel is a better card for gaming and a multi-monitor set-up. Power consumption is also a big plus point in AMD's bag -- AnandTech - Bench - GPU11
I am also inclining towards the AMD gpu route as practically two HD 6850s CF eat less juice than a single GTX 580 & still beat the crap out of it.