Overclocking S9i in relation to temperature?!

[MiniMike]

Hello,

I own Bitmain S9i, I'm under Braiins OS+ since the beginning.

I have never increased the power beyond 1300w, for fear of making them overheated and out of order, since this summer it was running quite easily at 100% ventilation.

But in winter my room does not exceed 10°C, and fans between 15 and 30%.

Would it be dangerous to increase the power? Or on the contrary, would the fresh air allow a better regulation?

Thanks
Mickael

[MiniMike]

What I was wondering is what is most likely to damage the chips?

Overheating due to not enough cooling?
Or
Over-frequency / over-voltage?

Let's say I have an S9i with a power supply that could not be more excessive! "Like 4000w".

Let's say that at 1420w it gives 16.5Th/s under Braiins OS+, air inlet temperature 25°C, fan speed 90%.

Would the chips accept a setting of 2000w, if the air inlet was 3°C and the fans were at 90% ?

Just curious, I don't plan to do this on my S9i!

I was just wondering what would be likely to damage them first.

[NotFuzzyWarm]

What I was wondering is what is most likely to damage the chips?
Overheating due to not enough cooling?
Or
Over-frequency / over-voltage?

Overheating is the chip killer. As to what can cause it:
1. Insufficient cooling
2. OC/OV coupled with poor cooling. All OC/OV does is increase chip temperatures but provide enough cooling to make up for that and you are good..

[MiniMike]

Ok, that's why we can see S9 in watercooling with TH/s of 18 ?

So even if you increase the power and the voltage, theoretically there should be no problem as long as the cooling is optimal?

Also I imagine that it could be reliable on S9, but much less on S17 Pro or S17+ ?