I'm building my first PC its for gaming/editing/rendering I don't know which motherboard to go with MSI Z77A-G45 or ASRock Z77 Extreme4. The MSI is about $15 cheaper without MIR with MIR it's $25 cheaper. Remaining components: http://pcpartpicker.com/p/EzOT MSI mobo:http://www.newegg.com/Product/Product.aspx?Item=N82E16813130645 ASrock mobo:http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
Id go ASRock, ive seen some of the Msi-G45 boards have less than ideal voltage regulation.
both are good boards.
if you could buy it, than the Msi Z77 Mpower thats the big bang series. that one is awsome http://www.newegg.com/Product/Product.aspx?Item=N82E16813130660
otherwise both msi and asrock board are good, i prefer msi above asrock, but thats cause my experiance with msi boards are better then with asrocks boards :)