crash to desktop while gaming is often (not always) related to low vcore, or sometimes dram voltage
too high cpu temps is also a cause for instability
ROG Dual Intelligent Processors 5 program for OCing = kinder egg surprise, its not stable or reliable
for a minor cpu OC, try just to bump up the vcore slightly above default in bios
but if your having temps problems, avoid overclocking , or find the source of the thermal issue first
quote: I feel like I shouldn't be above 82C with stock clocks and a water cooler with fresh thermal paste on it...
trust that feeling ))
good luck