As they said Monero(XMR) and Electroneum(ETN) are both cryptonite coins which are less preferred by GPU miners the best choice.
Depending on the pool's luck and availability, either one will give you fractions of a coin in every payout. Just don't even try to solo mine those coins with a single CPU.
Thanks,
Frank
Nicehash will accept your rig too (not the OP's rig), if you want to earn Bitcoin. You can choose to mine equihash for the GPU, Ethash/Cryptonite for the CPU and get paid in BTC.