You can go to the 2.9 Ghz i7 board. Apple part # 661-6589-R
It's probably going to cost you in excess of $500 to do the exchange.
I'd look to see what a brand new one is running and what your machine would bring on eBay. You will not get your money back out of an upgraded machine.
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I take it you are running in Windows mode for the BF4.
You can go to the 2.9 Ghz i7 board. Apple part # 661-6589-R
It's probably going to cost you in excess of $500 to do the exchange.
I'd look to see what a brand new one is running and what your machine would bring on eBay. You will not get your money back out of an upgraded machine.