Temperature changes outside don't translate to temperature changes on the die. If the cards are running 24/7 there will be no thermal shock to speak of since they are always generating heat.
Why do they reboot? We run on the edge of peak OC tuning performance by default and I've built an automated tuner which downclocks individual cards. This way, they get more stable over time, while maintaining their best possible performance.
Occasionally, we would reset the tunings and then let them auto tune back... this accounted for the seasonal variances because hotter cards are more prone to crashing.
Again, this isn't an actual issue and I have the data to prove it.
You wouldn't want my cards, because they don't have fans. Most people don't have adequate cooling for something like that.
It may still be a lot less 'shock' than normal use, where players have a 15 minute round, then low use for a couple minutes, etc, for hours.. and then turn the card off.
Thermal cycling is known to be bad for electronics-- this is well studied and documented. Sustained high temperatures are also bad, but it's only really bad when the temperatures are really high.
Certainly, thermal cycling can be an issue for electronics in general, but my experience with these specific cards says that it isn't an issue at all. At least certainly not as much as something that should dictate purchasing 'miner' cards or not.
Do you know what causes NVIDIA cards to have their output turn off (black screen) and the fan to go 100%?
Been happening to my 2000-series recently but I don’t know what to try to fix: cooling, PSU, or capacitors…
My guess is a vbios or driver bug. You could also be running into a tuning issue. GPUs are amazingly complex beasts.