Good God Lath... where's the punctuation?
Also correct the modding shouldn't be required but it most certainly is a big difference for GPUs.
nVidia's Maxwell and Pascal cards are specifically sensitive to changes.
Whilst for CPUs it'd be perfectly manageable ... there is actually a noticeable detriment for GPUs.
Hence the suggestion.
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Nothing wrong with removing the cooler, cleaning it, cleaning off the thermal paste from the cooler and CPU and re-applying them and trying it.
That said the stock coolers of Intel are absolutely garbage... So if it works with new paste and you want to cheapen it a little even a basic model is perfectly fine for a cooler like a Cyrorig H7 or Be Quiet! Pure Rock / Pure Rock Slim / Shadow Rock Slim or even Cooler Master Hyper 212X and be considerably quieter.
That said if your case panel is open en you replaced the thermal paste properly and attached it propely then I suspect you may need to have your CPU delided to fix it if you're not inducing insane voltages via the mobo.
As it is actually happening quite a bit now that the paste between the IHS and CPU die is evaporating (chemical process of drying/cracking up before someone makes a stupid comment of pastes not drying up) and causing high temps because it cannot actually transfer heat anymore.
The simplest and cheapest way is to find someone offering a delid and relid service and have that done with either new Thermal Paste or Liquid Metal, temps would drop like a brick.