I would not be OK with my CPU running at 90 anything firstly. My personal cutoff point is 80°C. Secondly, I think you're misunderstanding a little, because at 100°C the thing is supposed to shut down to prevent permanent/immediate damage. That's not the same as it being OK to run at 90-100°C. If I were you, I'd revert back to the factory settings until getting a de-lid, which brings me to this:
The de-lid was most definitely was worth it. I forget the exact voltage, but prior to the de-lid I was limited to 4.8GHz. Post de-lid I lowered the voltage and cranked it up to 5.0GHz, again, using less voltage... and it was perfectly stable. It also, as previously mentioned, stays MUCH cooler than it did even at stock values under stress. Intel really screwed us Kaby Lake guys with their IHS/paste method.
To answer your second question though, I used Silicon Lottery's de-lid service, which is $49.99 plus freight. https://siliconlottery.com/collections/all/products/delid
Yeah I stopped it when it spiked to 93*. But that was after 20 or so minutes in a stress test. The most I have ever seen when not stress testing is maybe 75*. Normally, it ranges between 32-55* almost all of the time. I still would like to delid but on a normal basis my temps don't really scare me.
I know that silicon lottery does good work but I am worried about the turnaround. I may try to do it myself. I know there are a few decent kits out there that seem simple enough.
Sent from my iPhone using the svtperformance.com mobile app