How smothly will this play games?

Rhood pretty much answered the Ram question for you in more detail, the ram would work on your mobo but you wouldn't get the speed you are paying for. Sort of like 3.0 bus speed for gpu's then getting a 2500k. (not that you need 3.0 bandwidth for gaming anyways.)

Ok thanks for the feedback 

how about this ram then :http://pcpartpicker.com/part/gskill-memory-f314900cl9d8gbsr

Or this one:http://pcpartpicker.com/part/gskill-memory-f314900cl9d8gbxl

im tempted to go with the second one because its cheaper

If you want a bit cheaper and a great product in terms of price, performance and reliability try (they also offer it in other colors, I'd pick blue just to match)

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231445

F3-12800CL9D-8GBXM, <-- that's so you can find it on pc part picker, they can probably find it cheaper than newegg

 

ok thanks for the feedback :) much appreciated

this one:http://pcpartpicker.com/part/gskill-memory-f312800cl8d8gbxm

 

Good luck, becareful and upload the build when you're finished, I want to see that MSI case in use! ;)

yea i will hopefully ordering within the next month :)