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Hey,

I have a rig with 3 ASUS STRIX GTX 1070 8G and this morning one of them was in a strange state.

I use MSI Afterburner with a custom fan control curve.

Here is the behavior :

First fan (nearest from connectors) was spinning at 100%
Second fan was spinning at the speed defined by the control curve (that's what I think)
Third fan was spining very slowly and intermittently (and it was very hot when I touched it)

From miner point of view, card is fine (temp. also ok)

The card has a few month.

Have you ever heard this kind of problem?

Thanks

i heard that the first 1070 from msi, the first release were faulty i their fan system maybe you had one of that gpu, could be just that or you screwed something in the setting, try to syncronize via afterburner, otherwise return it to the dealer with rma

I have written this over and over don't use auto settings of any kind on msi afterburner.

set manual at 70%   check your temps  and adjust up or down by 10%

all msi auto settings  custom or not tend to fail after time.



and I am sure someone will pop up to disagree with me. ;D

oh do you use msi afterburner 4.3   stable  build?

Fixed speed is a bad idea imo. It's much better to have a simple custom fan curve, something like this:

https://i.imgur.com/b4LZYwp.png

That way if the cards are not mining due to whatever reason, the fans won't work at higher speeds unnecessarily and in case they get too hot, the fans ramp up to 100%.


Anyway, for the Strix 1070 it seems all 3 fans have their own tach and PWM connections so all 3 fans can be controlled independently. (stop at 3:56 https://youtu.be/0GUySjP7-gI?t=236 to see cables)

Usually only one fan has a tach signal and the rest of the fans get the same power so they spin at the same speeds. But not with this Strix model. Apparently there's a bunch of threads complaining that fans tend to spin at different speeds or that one fan is being "lazy", only turning on after some time while the other two is spinning fast already.

I'd try to control the fans with GPU Tweak II to see if that works.

Problem is the curves don't hold. And either do too low or too high.

While manual tends to keep the setting .

It is general rule of thumb

I find there's only two reasons for fan curves not holding; one is if there's two softwares trying to compete over changing speeds.

And the other is if you have the fan speed update period set too high - which would be located just under the graph I linked above, if it weren't cropped out.