
Ryzen 7 2700X and Ryzen 5 2600X Overclock to 5.88 GHz
Sadly needed exotic cooling
Two of AMD's upcoming second-generation Ryzen processors have already been overclocked to more than 5.8GHz and beyond.

Intel's Core i7-7700K overclocked past 7GHz
Better overclocking than Skylake
While it might not be interesting for an average consumer, Intel's upcoming 7th generation Core Kaby Lake CPU series might be quite popular with overclockers as it is much better overclocker than Skylake and manages to hit a stable 7GHz overclock.
MSI officially launches HD 7970 Lightning card
High factory overclock, insane overclocking ability
Maingear, Origin overclock i7 2700K to over 5GHz
High end desktop extravaganza
AMD Radeon HD 6790 is a great overclocker

Might be unlockable as well
Nexus S can be overclocked

Making your hummingbird hum
Intel overclocks Sandy to 4.9GHz

Using a stock cooler