6850k cpu core clock speeds in gaming question

[elkido122]

I am using riva tuna and hwinfo combined with afterburner to show my cpu core clock speeds on each core. I am having a hard time understanding why core 0 runs at 1299mhz and cores 1-5 run at the rated 3800 mhz. shouldnt every core in a game like Player unknowns battlegrounds make every core run at 3800 and not 5 of the 6? thanks

 

[elkido122]

thanks in advance