Many of the altcoins with the cryptonightgpu algorithm such as equilibria, conceal are mine well with the latest generation 3xxx cards but the gains are not in the least comparable to those of eth mining
No one will mine new shitcoins when the profit from mining ethereum is much greater. Also, the protection against a 51% attack on new shitcoins is incomprehensible, because they have a very small hash rate. Perhaps after Ethereum these coins will be popular with miners for some time.