Question: what is the difference between intel core 2 duo and i7?
Answer: “An i7” can be the dual core i7-3517U which is only slightly faster than a Core2 Duo E8600 (All U series i7s up until 8th gen were dual cores, the Y series i7 are still dual core) all the way up to the 8 core 9700k and the 10 core 6950X which are probably at least 5 times more powerful.