GPU related problem for Galaxy Grand Duos GT-19082

by DawnMathewsJohn - 2/17/13 8:26 PM

Recently i bought a Samsung Galaxy Duos. I found from several videos in YouTube that the GPU benchmarking tool Nenamark 2 gives it an average 58.8fps.

But the same Nenamark 2, i installed in my Galaxy and after test i get only an average of 28fps.

Can anybody tell me why this happens?
Samsung cheated me with a low GPU than in Specs or the people in YouTube, or I'm unaware of proper conduct of the test.