A:AnswerIt comes with a 3 year warranty already. If you need a warranty to cover overclocking, just buy it from Intel for $20 https://tuningplan.intel.com/
A:AnswerYes it will uses a 1151 socket,
Make sure that you have a 8 pin cpu power socket going into your motherboard, also check ram compatibility. And if your motherboard over overclocking abilities. If it doesn't then no point in getting on unlocked cpu
A:Answerim not exactly sure but i know there should be some program to overclock and i dont think you overclock a single core to that i think its all of them you overclock to 4.9 or 5 but i suggest staying just under it to make sure it doesnt over heat too much because it will get somewhat hot just make sure u have fans and a good cpu cooler
