@Bullvied yes there is a miner in the wallet. However, when mining in a pool, you might want to use the miner the miningpool recommends. They all use the same miner. I myself use the miner from effectocause, all the options are mentioned at the pools.

@abudfv2008 an i5/i7 can be productive or power efficient in that matter. An i7 can reach around 2500 h/m, that will get you 1/4 of a coin, sort of in a pool.
But it depends all on if it is a laptop i7 of a pc. Also the generation of the CPU is important, with the instructions sets it has. The miners use the advantage of AES, AVX and AVX2