Sandy Bridge, Part 4: Core i5-2400, i5-2500K and i7-2600K CPUs - Silent PC Review
Gaming Performance - The Sandy Bridge Review: Intel Core i7-2600K, i5-2500K and Core i3-2100 Tested
This is why I hate userbenchmark.. how are you going to say a modern 16 core cpu is only slightly more powerful than a 4 core cpu from 2011 : r/pcmasterrace