The fastest skylake approved memory kit we sell and used by 8 pack himself guaranteed to run at a minimum of 3866mhz and in some cases over 4000mhz not guaranteed this is one of the fastest memory kits available and ideal for those seeking that last bit of performance from their skylake setup features hand tested by kevin wu and 8 pack world champion overclockers lifetime warranty specification cpu compatibility intel skylake chipset intel z170 capacity 8gb 4gbx2 dual channel k