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ICX temp reporting question on FTW3 3090

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koroem
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2021/07/31 17:53:59 (permalink)
After a gaming session today I was reviewing my temp logs and noticed ICX reporting mem3 at around 90 degrees. My card is waterblocked and all other ICX temps read mid 50s or lower. This leads me to believe there is bad thermal pad contact on the memory closest to the pcie connector, or to the lower right side of the gpu core.

Is that the correct position of mem3? Also with it being a 3090, how likely is it that the bad contact could actually be on the backside of the card with the memeory modules and the backplate? Can ICX pick up a problem in that region through the pcb? Or is it more likely to be on the front side of the card?

I assume I'm looking for pads with little to no compression/indentation from the memory modules, but in the event that the contact looks good, what else could cause this on that one sensor?

I plan to take it apart later this week when I need to open up the loop for a replacement flow sensor anyways, just wondering how much of a tear down I should expect on the gpu. Backplate is quick, taking the whole block off is not hard, but just much longer of a process.

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    koroem
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 09:25:55 (permalink)
    Ok after another session this makes no sense. Now the hot sensor reading was at GPU2 on the opposite side of the gpu core. Up to 89c where all other sensors read 50c or lower including the previously mentioned MEM 3 sensor. What the hell is going on?

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    Sajin
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 10:31:38 (permalink)
    Buggy icx readings?

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    #3
    koroem
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 11:42:18 (permalink)
    I'm not sure, what I do know is that it triggers thermal throttling on the card and fps drops hard (30ish fps when I'd normally have 100+) and stays down till I reboot.

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    Sajin
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 12:09:32 (permalink)
    Odd. The temps you posted shouldn’t have caused throttling.

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    ty_ger07
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 12:14:02 (permalink)
    koroem
    I'm not sure, what I do know is that it triggers thermal throttling on the card and fps drops hard (30ish fps when I'd normally have 100+) and stays down till I reboot.

    That sounds like an unstable overclock or unstable factory clock. A thermal throttle won't act that way.
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    koroem
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 12:19:48 (permalink)
    Right. I initially thought the driver crashed when fps tanked, but when I checked the event logs there was nothing. Thats when I checked the temps in HWiNFO64 and saw the max 90ishC peak on the iCX sensors and "Performance limit - Thermal" listed as "yes". I also saw that it showed yes for throttle because of "SLI GPUBoost Sync"? Which is odd cause its a single card. The gpu core max temp was 42c. Not sure how that is even close to throttle.

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    the_Scarlet_one
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 13:06:55 (permalink)
    From my understanding, the ICX sensors are not tied to the operation of the card, only to the reading of the sensors.

    Thermal throttling is only going to happen long enough to get temps under control.

    HWInfo64 has incorrect reporting lately, or my CPU is running around 48ghz (not 4.8, forty-eight). Sadly, the reporting errors are getting significantly worse from HWInfo64, so I am hoping a new update fixes the errors soon.

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    #8
    koroem
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 13:13:12 (permalink)
    That is my understanding as well. The thing is only one sensor spiked each time and neither should have triggered anything, which is why I am confused things are happening.

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    ty_ger07
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 14:44:04 (permalink)
    The only thing I know of which will drop clocks like that and hold them low like that until a reboot is an unstable overclock (or unstable factory clock). Temperature throttling is only temporary.
    If the card is overclocked, remove the overclock and test some more.
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    koroem
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 17:03:33 (permalink)
    Yeah I'm gonna reduce clocks and test more, I'm just still confused as to why thermals are being reported the way they are unless erroneous thermal readings are a result of stability issues. Didn't know that was a thing.
    post edited by koroem - 2021/08/01 17:05:04

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    ty_ger07
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    Re: ICX temp reporting question on FTW3 3090 2021/08/01 17:30:07 (permalink)
    koroem
    I'm just still confused as to why thermals are being reported the way they are ...

    Erroneous spikes in readings seem to be common on EVGA cards (and others?) this generation, for whatever reason. If it is a spike which just appears one instant and is gone the next without any significant ramp up or ramp down, it is pretty safe to assume that it isn't a real measurement.
    post edited by ty_ger07 - 2021/08/02 05:02:17
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