random system hang

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Re: random system hang

Postby PantherX » Sun Jan 10, 2021 8:04 am

djgibbons wrote:... know that Nvidia offers an interface to connect 2 cards to make them work together, but have not tried it. Would FAH see them as 2 slots if tied together?..

If you use SLI, F@H doesn't use it and will see two independent GPUs which it can use.
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Re: random system hang

Postby bruce » Sun Jan 10, 2021 5:47 pm

Right. Don't bother.

The features that let two cards work as one are ignored by FAH. It does improve the frame-rate of the display (if you're a gamer) by distributing the rasterization process across alternating GPUs but FAH will still treat them as independent devices.
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Re: random system hang

Postby djgibbons » Wed Jan 13, 2021 5:06 pm

Nvidia asked me to use only the K4200 and disable the RTX 4000 to see what happens. The computer never froze overnight, even with FAH running at Medium. This morning I reactivated the RTX 4000, but left both monitors plugged into the K4200. One interesting detail is that the K4200 is running about 4C cooler, and the monitor cables are really warm. I think the cables are cooling the K4200 just enough for stability. If the current setup works, I will then move one monitor back to the RTX 4000 and see what happens.
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Re: random system hang

Postby PantherX » Thu Jan 14, 2021 1:05 pm

While I haven't heard of monitor cables used to dissipate heat, if it works, who am I to challenge the PC Gods :)
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Re: random system hang

Postby djgibbons » Thu Jan 14, 2021 9:16 pm

What I found out is that when the RTX 4000 is active as well, the K4200 slowly starts to warm up. I saw pixels flickering on my 1K screen, and a short while later my computer froze. The temperature of the K4200 was back up by 4C. This tells me that the K4200 is getting hot enough to malfunction. I will figure out a way to cool it more, so that it can still be active.
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Re: random system hang

Postby JimboPalmer » Thu Jan 14, 2021 9:33 pm

You should be able to manually increase the fan speed, and or reduce the GPU clock speed to reduce heat. I use MSI afterburner

https://www.msi.com/Landing/afterburner
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Re: random system hang

Postby djgibbons » Thu Jan 14, 2021 10:48 pm

LOVE THIS! I downloaded MSI Afterburner, and the immediate impact is ~20C drop on both cards (I made a custom curve and shifter the MAX point over to 65C. I will leave it for a while, but later might try FAH on Full setting to see what happens. The immediate effect makes me think that fan control on the cards is wanting. I will ask Nvidia to see what they think.
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Re: random system hang

Postby PantherX » Fri Jan 15, 2021 3:52 am

Ah, yes MSI Afterburner is awesome and I have always set my fan profile to run at 100% 24/7 and the automatic overclock just works its magic.
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Re: random system hang

Postby djgibbons » Fri Jan 15, 2021 4:23 am

How is the automatic overclock enabled?
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Re: random system hang

Postby PantherX » Fri Jan 15, 2021 4:55 am

When it comes to Nvidia GPUs, they use a feature called GPU Boost (https://www.nvidia.com/en-us/geforce/te ... echnology/) which is considered overclocking. Thus, I used the "automatic overclock" but do note that you can use the OC Scanner (https://www.techspot.com/news/78031-nvi ... lable.html) to get more performance but folding is more demanding than gaming so I let GPU Boost work. Stock frequency on my GPU is 1607 and it boosts up-to 1900 to 2025 depending on WU and ambient temperature.
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Re: random system hang

Postby djgibbons » Fri Jan 15, 2021 3:33 pm

It does not seem to work on Quadro cards. But my computer ran overnight with FAH on Full setting, so I am happy with that.
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