boss...if u really want to see your temperature running at 40+ during gaming...get a full set water cooling...dun expect too much on air cooling as you cooler fin total surface area is smaller (bigger area give better heat dissipation)...if your casing allowed..get a NOCTUA nhd-14...kick most of the cooler ass sky high but very huge heatsink...

me usually when gaming, cpu heat is not the main problem, is the GPU heat, me reach 60-70c when extreme gaming, but still not OC yet...

OC on air has huge limitation...possible get a water cooled ones...your gigabyte windforce should be no problem keeping the heat of GPU down...

if u dun want to risk of leaking, get a corsair h80 or h100, but does not guarantee will not leak, but i never had an experience b4, now i using full WC, if possible try not to put the reservoir in your case...me not a pro in WC, but i somehow found that WC is just like that lol, planning to use back the air cooling
i just use to cool my CPU onli, but using a 240mm radiator with 4 fans, damn noisy...