Your servers can run at 100℃ ambient temperature? Oh, I guess you mean F? Yeah, servers can run just fine at 40℃. Well… unless they fail because of it. :-) Tha

Your servers can run at 100℃ ambient temperature? Oh, I guess you mean F? Yeah, servers can run just fine at 40℃. Well… unless they fail because of it. :-) That is: The ones that don't fail work just fine. If you have a DC with 10'000 of your servers, and maybe 30'000 hard drives. What percentage of them will fail on any given day at 25℃ vs 40℃? But it's not just your servers. Can your AC equipment/evaporators work at 40℃? And if your ACs start failing you could be looking at a cascading failure where it's actually more like 60-70℃, or just plain "a fire", in your DC. Can your generators work? And the answer also isn't "every component in my DC must be milspec extended temperature range". It's actually fine to build a DC in Iceland that's not specced for outside temperature of 50℃. In fact it would be a ridiculous waste to do so. Google of course measures this. E.g. https://www.techrepublic.com/article/google-research-temperature-not-a-major-factor-in-hard-disk-failures/ https://www.techrepublic.com/article/google-research-tempera... But do keep in mind that 40℃ outside may mean 50℃ inside. Or indeed just 60℃ hotspots on the DC floor. Hell, your network cables may not even be rated for 60℃. They usually aren't. Your server may be fine with 40℃ inlet, but going out the air may disconnect it due to melting the network cable.