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post #21 of 68 (permalink) Old 11-11-2018, 01:15 AM
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Yeah, mine are connected to the motherboard as well. I tried connecting them to the gpu first (with a mini 4pin adapter), but it looks like nvidia works with actual fan rpm instead of pwm percentage. No matter how much I tweaked it, I couldn't drop the pair of Silent Wings 3 below 1200rpm, which is the minimum rpm of the factory fan. Before buying the graphics card, I searched as well for one with a compatible fan connector, but now my advice is just buy whatever and hook the fans to the motherboard.

In any case, I'm using the MB's 2nd pwm connector (thankfully is true pwm), with cpu temp as a basis (don't really use any workload where I only stress the gpu) and even though it could use some more tweaking, I'm liking the result for far: a 75C result on the stock cooler dropped to 49, with the fans at 1050rpm. Boost clocks were stable through the test too, so I'm assuming the vrm's (thank you nvidia for not including vrm temp sensors, really smart that) are fine under the stock baseplate.
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post #22 of 68 (permalink) Old 11-11-2018, 01:30 AM
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Quote: Originally Posted by jonny27 View Post
I couldn't drop the pair of Silent Wings 3 below 1200rpm, which is the minimum rpm of the factory fan.
I don't know if it works but theorically the NA-FC1 from Noctua should let you run your fans slower. It reduces the RPM signal.
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post #23 of 68 (permalink) Old 11-11-2018, 01:47 AM
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Quote: Originally Posted by Goodcharly View Post
I don't know if it works but theorically the NA-FC1 from Noctua should let you run your fans slower. It reduces the RPM signal.
In theory yes, but at this point I would just be removing one controller from the case to install another one. Also, it's now working fine as it is.
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post #24 of 68 (permalink) Old 11-11-2018, 02:16 AM
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Quote: Originally Posted by Goodcharly View Post
I don't know if it works but theorically the NA-FC1 from Noctua should let you run your fans slower. It reduces the RPM signal.
I've seen somewhere mentioned that nvidia is nowadays checking the fan's RPM sensor reading. The card tries to find whatever PWM signal will produce a certain RPM. I mean, when you tell its fan controller to set a "30%" speed, it thinks that's intended for whatever factory fans were originally on the card. If that was a 4000 RPM fan, it then tries to run your fans at 1200 RPM, no matter what kind of fans you actually have.

If that's really how it is, the NA-FC1 would be a bit pointless, it still wouldn't really be possible to have the card control the fans.
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post #25 of 68 (permalink) Old 11-11-2018, 02:19 AM - Thread Starter
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@Melcar If it's not too inconvenient, can you take a picture of your graphics card and show how close it is to the chipset heat sink?

I'll be following up very soon with some of the brainstorming I've been doing in regards to what I think I'm going to do. Thanks a lot for all the help guys.

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post #26 of 68 (permalink) Old 11-11-2018, 04:15 AM
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Quote: Originally Posted by deepor View Post
I've seen somewhere mentioned that nvidia is nowadays checking the fan's RPM sensor reading. The card tries to find whatever PWM signal will produce a certain RPM. I mean, when you tell its fan controller to set a "30%" speed, it thinks that's intended for whatever factory fans were originally on the card. If that was a 4000 RPM fan, it then tries to run your fans at 1200 RPM, no matter what kind of fans you actually have.

If that's really how it is, the NA-FC1 would be a bit pointless, it still wouldn't really be possible to have the card control the fans.
I see. You better check twice the GPU you buy. And I hope we will be still seing regular mini-4pin connector in the future...
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post #27 of 68 (permalink) Old 11-11-2018, 04:50 AM
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Quote: Originally Posted by deepor View Post
I've seen somewhere mentioned that nvidia is nowadays checking the fan's RPM sensor reading. The card tries to find whatever PWM signal will produce a certain RPM. I mean, when you tell its fan controller to set a "30%" speed, it thinks that's intended for whatever factory fans were originally on the card. If that was a 4000 RPM fan, it then tries to run your fans at 1200 RPM, no matter what kind of fans you actually have.

If that's really how it is, the NA-FC1 would be a bit pointless, it still wouldn't really be possible to have the card control the fans.
Interesting. Would you have a link to info about this PWM signal to rpm reading? We've had motherboard and GPU with 'fan not spinning' warnings, but I've never seen one that was comparing PWM% to fan rpm%. Not doubting what you say, just wanting to learn more.

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post #28 of 68 (permalink) Old 11-11-2018, 07:22 AM
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@doyll :

I saw this on a leaflet that came with my Arctic Twin Turbo III. I found a download for it on their website:

https://www.arctic.ac/de_en/download...al_english.pdf

There's a sentence about nvidia at the top of the second page. In the settings table at the bottom of the page you can also see that they recommend weird, very low percentages for nvidia. The fans that come with the Twin Turbo are thin 92mm fans with a 900 to 2000 RPM range.
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post #29 of 68 (permalink) Old 11-11-2018, 07:34 AM
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MK-26 isn't good. Back in the days I replaced my Windforce X3 on my 7950 with it and there was no improvement.

I don't know about Morpheus II but if you look back at this https://www.tomshardware.com/reviews...90,3671-4.html, Accelero Xtreme III can keep a R9 290 at 50C. It's worth considering too.

Personally I would just go with an AIO. Cleaner, performs better than any of these air coolers, don't add tons of weight to the card, and most importantly doesn't make your card 4-5 slots.

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post #30 of 68 (permalink) Old 11-11-2018, 07:47 AM
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Quote: Originally Posted by Bartouille View Post
Personally I would just go with an AIO. Cleaner, performs better than any of these air coolers, don't add tons of weight to the card, and most importantly doesn't make your card 4-5 slots.
And a noisy pump at all times. No thanks.
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