I bought this i5 processor 15 months ago from Amazon and it runs very well in my pc. Recently I upgraded my pc with a i7 cpu and pull the 2500k from the motherboard. I use a after-market heat-sink fan so the heat-sink fan that comes with the cpu is intact.
NB: I NEVER OC this processor, I bought this K-series processor because I wanted to get the best 4cores/4threads cpu.

I am selling the processor for $160 OBO.