Try using Nicehash to get its benchmarks. However, don't expect much from this GPU, it used to be a decent one but it's old, too old for this job.
I had tested a friend's GTX 760 and its benchmarks were worse than my laptop's 950M. Older generation Nvidia GPUs are not quite efficient for mining.
NiceHash does not recognise it as a usable GPU... hold my beer while i cry
Too old I guess and it's not supported, you can't do much with this GPU anyway, either sell it and buy a new, updated one. If you opt for Nvidia, go for 10xx Series.