The big.LITTLE technology! The key aspect of OCTA-CORES!

MOST OF THE SMARTPHONES NOWADAYS DONT REQUIRE MORE THAN 1.7GHZ SO RATHER THAN INCREASING THE POWER BY INCREASING ITS FREQUENCY MORE CORES ARE ADDED TO DISTRIBUTE WORK AND HENCE REQUIRE LESS FREQUNCY OF PROCESSING!MULTI CORES ARE MUCH BETTER EXPLAINED ON MY ARTICLE OF MULTICORE PROCESSORE !

SO FOR HEAVY MULTITASKING AND HANDLING HIGH GRAPHIC GAMING A LOT OF SIMULTANEOUS PROCESSING IS REQUIRED HENCE THE NEED OF OCTA CORE PROCESSORS COME WHICH CAN HANDLE HEAVY MULTITASKING EVEN AT A LOWER PROCESSING FREQUENCY!
THE NEXT THING IS THE VERY COMMON ASPECT OF OCTA CORES IS big.LITTLE TECHNOLOGY !
OBVIOUSLY SO MANY CORES WOULD REQUIRE MORE POWER1BUT WHAT IF ONLY 4 CORES POWER EFFICIENT ARE ACTIVE WHEN THERE IS LOW LOAD ON THE CPU AND ALL 8 CORES ARE ACTIVE WHEN THERE IS NEED?!
THIS IS EXACTLY WHAT THE big.LITTLE TECHNOLOGY DOES!IT KEEEPS THE CORES ACTIVE ACCORDING TO THE NEED AND THE LOAD KEEPING POWERFUL CORES ONLY ACTIVE WHEN HIGH PERFORMANCE IS NEEDED AND ALL 8 WHEN THE CPU IS COMPRESSED WITH HUGE LOADS!SO THIS IS THE WAY OCTACORES SAVE POWER!