[Q] poor hardware/software issues. topic

i had purchased the oneplus one (india version 64gb variant CM11S) and received it on the 15th of dec'14. since the last 20 days i hav noticed a certain lag on my onepelus one while playing asphalt 8 inspite of 46 gb free storage...i ran an antutu benchmark v5.6 and to my surprise came a poor score of 29000 and also during the video played during the test it showed only 30fps.... i checked the core information & it always used to show core0=1036MHz /300 Mhz, core 1=0(stopped), core2=0(stopped), core3=1036MHz/300MHz i.e only 2 cores work inspite of activating the performance mode & havig snapdragon 801 (2.5Ghz*4)...i am really concerned...i asked a guy on fb and he said that my cores are probably underclocked and advised to factory reset tthe phone... but my xam will start in the near future and i dont want to get in the reset mess....guyz please help.....and do invite other to this chat...i want to have diff ideas.