y7000

Hi, I got a Lenovo y7000 the other day and now after some testing I found out that core 0, 2 and 4's temperatures are 10-15 degrees higher than core 1, 3 and 5 under heavy load. I can't return it as my uncle got it for me in US and I live in Asia. Is there any way I can fix this? Also, core 1...