I have PC - i7-6700K CPU @ 4.00GHz & graphic: Intel Corporation HD Graphics 530. My Os is Ubuntu. How many Mh/s i could receive for Ethereum? Let's assume the current is free.
You can use MinerGate app Benchmark feature to estimate how fast your PC is. IMHO it's not possible to generate MH/s on a regular desktop PC. You need a rig to reach that speed. You can have some two-digit hashes, maybe 1 kH/s but no MH/s.