Do I need PIC-E 3.0?

I am building a desktop and I am wondering if PCI-E 3.0 is worth the money for me. I will be using mostly 3-D modeling software such as Autodesk Inventor and Solid Works. The only games I usually play are from the Total War Series such as Empire Total War. I have read that there is a difference in speed by now but would a PIC-E 2.0 do what I need it to do? Also what kind of specs is good on a card? I was looking for around 2GB memory.

Other Components,

Intel Core i7-2700K or i7-3770K (Depending on the PCI- E 3.0)
Antec EarthWatts EA-650 GREEN
CORSAIR Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM
ADATA S510 Series AS510S3-120GM-O 2.5" 120GB SATA III MLC Internal Solid State Drive

Thanks for all the help!!!!!!!
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  1. Best answer
    there isn't a single GPU that has maxed out PCIe 2.0 x16 speed. 3.0 makes no difference at all. the 3770k uses the same socket as the 2700k and the same price, so why not get it? it performs better while using less power.

    I don't know what to suggest for a GPU but i heard AMD is better for GPU intensive software that doesn't involve gaming. don't take my word on that though.

    as for your SSD, i would get something with a better reputation like a Samsung 830/840.
  2. Best answer selected by Grosskumtor.
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