Your mobo, for some reason, is a little different than the out-of-stock more legitimate looking one: http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
There is a difference. Here's a comparison of both of the Extreme4s and the Pros:http://www.newegg.com/Product/Productcompare.aspx?Submit=ENE&N=-1&IsNodeId=1&Description=asrock%20z77%20extreme4&bop=And&CompareItemList=-1%7C13-157-293%5E13-157-293-02%23%2C13-157-297%5E13-157-297-02%23%2C13-157-296%5E13-157-296-02%23%2C13-157-294%5E13-157-294-01%23
As you can see, the Extreme4 has a lot of stuff that makes it seem like it's a slightly Extremeified Pro board... some stuff differs. For example, the LAN chipset.
Then, I realized: The Extreme4 you have is a MICRO ATX! Did you know this? I would suggest a full ATX. If possible, wait for the actual Extreme4 to be back in stock, or buy one of the Pros (not that much of a difference).
I don't know why you got a Z77 mobo anyway, because you don't have IB AND you're not overclocking... both are things the Z77 is for. Why do you even need the Extreme4 if you're not overclocking? Why do you need Z77, or Z68?
We can't tell you how your build is going to perform because you didn't tell us the essential elements: the GPU. You may have a GTX 680 and play anything, or you may have IGP... so we can't tell you how it's going to look on gaming.