hi Psst!
as far as I know you shouldn't find any conflicts. If you do, please post and someone with more knowledge than I should be able to help you figure out how to put MBAM on the allowed list/exceptions with NOD32.
I don't think it will slow your computer performance to run both.

Malwarebytes is pretty light on system resources. I am running AVG Internet Security and MBAM Pro together, and they seem to be fine together and not slowing down anything

Are you running the paid or free version of Malwarebytes?