I'm from Azerbaijan,and my relative will buy these and send to me from US,so i want to check carefully...what do you think is not a quality product,bottleneck or overkill,let me know
All helps are great appreciated
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That's what I'd suggest to get the best bang for your buck in terms of efficiency. The Pro3 is unnecessary because you won't be able to SLI with 16x/4x and you don't need that quite expensive of a PSU.
With PSU,i want to have room for later upgrades...but i have to think about another PSU,which is Modular but cheaper at the same time
About Mobo,i want something that later could be upgraded,with PCIe 3.0 and so...
No boards support true PCI 3.0 to start off. You would need an Ivy Bridge chip to do that, which will replace Sandy Bridge, if you want upgradability and SLI etc. The P67 Pro3 was not a very good choice, get the Asrock Extreme3 Gen3 Z68, that'll give you the biggest bang for the buck in terms of upgradability.
As for the PSU, it depends again. Do you plan to SLI or CF? If not the 520C would be perfectly fine, if you do then get something above 650w+ that's efficiency is good.