k1114 :
More than 1gb vram is absolutely useless for such low end cards and you can't compare clocks with different models let alone completely different architectures. The 730 should be more than a few fps difference. You maybe comparing it to the wrong version as there are different 730.
That's odd... GPU comparo's between AMD and NV are and have been an ongoing thing for years; different clocks, models, and architectures within "similar" target uses, correct?
Weirdly on the low end models like the gt 730 there can be multiple versions (one with GDDR3 and 128bit bus, one with GDDR5 with 64bit bus, one with 384 cores, one with 96 cores.... its a minefield.