Evga 560ti 2gb 384 cuda

Hello, i currently am running this card. evga 560ti 2gb with 384 cuda in my asus cg5290 with an upgraded 600w psu. http://ecx.images-amazon.com/images/I/41FthiVyTdL.jpg i am unsure if i am running it in a pci express or pci express 2.0 slot. I cannot tell the difference... i am also wondering if http://www.newegg.com/Product/Product.aspx?Item=N82E168... would be an upgrade as it is a smaller form factor i dont think my motherboard can sli. and it has 768 CUDA Cores which is twice as much as my 560ti 2gb i did search and i could not seem to find a guide to visually tell pci e from pci e 2.0 also i know the 768 CUDA Cores is pci 3.0 but is backwards compatible..... anyway suggestions would be helpful.

P.S. just ran GPU Z at first it said it was pci 1 x16 but i did a render test via the tool and it says pci-e 2x16@x16 2.0 core clock 822.7mhz memoryy 1002. shader 1645mhz. for some reason my fan speed via msi afterburner or evga precision only reaches a max of 75% fan speed and wont go any higher even if i try to force it. .... sorry for rambling but questions need answered

1. How to visually tell pci-e from pc-ie 2.0
2. would the http://www.newegg.com/Product/Product.aspx?Item=N82E168... be an upgrade from my current http://www.newegg.com/Product/Product.aspx?Item=N82E168... for benchmark / bottlenecking i am running an i7 920 cpu 2.67ghz but cpuz says its running at 2803 mhz and total of 9216mb DDR3 ram