Thanks for ur suggestion Zangetsu, called flipkart cc on 26th july and got a brand new replacement today:)
My system config is
Core i5 3470, Gigabyte B75MD3H, Corsair vengeance 1600 Mhz, WD Blue 1TB WD10EZEX, CX430V2, HD 7750,Antec one S3 USB 3 cabinet and I am getting 27 MBps data transfer...