Riddle: 2400 rpm minimum speed on GTX 1660 Super

[iGatto]

Greetings guys!
Atypical behavior of the fans of the video card Zotac GTX 1660 Super, bought second-hand in China. The minimum rpm at rest is 2400 rpm, but it is displayed as 40%, which is already strange. The temperature of the card is excellent, 30° at rest and 58° under load. At the same time, the maximum speed is fixed at around 3000 rpm. But it was not possible to reduce 2400 rpm in any way known to me. In MSI Afterburner, no manipulations helped. Decided that the BIOS was modified. Flashing another BIOS did not change the situation either. Fans installed new by the seller.
Perhaps someone faced with a similar anomaly? I'd love to hear a possible solution.

 

[oobymach]

Hello, a bios will not fix an issue that is hard coded, I have seen this behavior with other mid range cards (40% minimum fan speed, cannot be set lower or turned off) so it may just be normal behavior for your card.

 

[iGatto]

Hello, a bios will not fix an issue that is hard coded, I have seen this behavior with other mid range cards (40% minimum fan speed, cannot be set lower or turned off) so it may just be normal behavior for your card.

But can a speed of 2400 rpm be normal at rest? After all, such cards have a speed at rest of 1000 - 1300 rpm. Also, 2400 rpm does not correspond to 40%

 

[pavle]

Hello and welcome mr Cat.
The simplest solution, if you have the skill, would be to solder a resistor in +12V wire between the card and the fan. Value and wattage would have to be determined by checking the fan specs and a bit of experimenting. Around 33 Ohm would do but what wattage -> check the underside of the fan which says what amperage it's made for.

 

[iGatto]

Hello and welcome mr Cat.
The simplest solution, if you have the skill, would be to solder a resistor in +12V wire between the card and the fan. Value and wattage would have to be determined by checking the fan specs and a bit of experimenting. Around 33 Ohm would do but what wattage -> check the underside of the fan which says what amperage it's made for.

hello Pavle! But I had such an idea, only when using a resistor, the maximum fan speed will also decrease. But I have to try

 

[pavle]

Great!
Of course the fan speed will decrease, but it will still be able to change/to be controlled by the card, just with lower range instead of 2400-3000 some 1700->2500 I'd say.

 

[iGatto]

Большой!
Скорость вентилятора, конечно, уменьшится, но она по-прежнему сможет изменяться/управляться картой, только с более низким диапазоном вместо 2400-3000 где-то 1700->2500, я бы сказал.

thanks i will try this way

 

[P4-630]

Hey Nacho Varga!

 

[iGatto]

Hey Nacho Varga!

Hello from Tuco Salamanca

 

[droopyRO]

Could it have been a mining card with a modified BIOS ? I have not heard of a card that idles at 2400 rpm.
EDIT: are those fans what Zotac used or some other model ?

 

[iGatto]

Могла ли это быть карта для майнинга с модифицированным BIOS? Я не слышал о карте, которая работает на холостом ходу при 2400 об/мин.
РЕДАКТИРОВАТЬ: это те вентиляторы, которые использовал Zotac или какая-то другая модель?

so I flashed another version of the bios.
and the fans look like the original ones, and there are round Zotac stickers. Confused only on the inside of the blades is the rough processing of the plastic

I installed the cooling system from this card into the Palit GTX 1650 card and everything works fine, the speed is 1300 rpm and even the fanstop works. It means that the problem is still in the BIOS settings. But this is not logical, because I already reflashed it

I did it! The BIOS firmware in which the same Device Id but a different Subsystem Id helped. And now I see the cherished 900 rpm at rest.