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GTX 960 short (2962) vs. long (2963) cooling performance difference?

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jamka
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2015/11/20 10:00:35 (permalink)
Anybody have a good sense of the relative cooling performance (temperature, noise level) of these two main EVGA GTX 960 cooler styles? I'm talking about the longer, two-fan model seen on cards such as the 2962 2963 compared to the shorter, one-fan design seen on cards such as the 2963 2962 (edit: on second glance I got my wires crossed on the model numbers). I guess I would be stoked if EVGA had actual numbers they were willing to share with regards to noise levels, but failing that, what is known about these two? I'm trying to gauge the potential noise level of the shorter card for a decently well ventilated but restrictive ITX build where the longer cards don't physically fit.
 
The fans seem to be identical, but that's only in physical appearance. Do they run on the same PWM controller and range, resulting in the same rpm (as necessary for cooling)? As we know from the R9 Fury Nano, small cards can combine reasonable cooling with decent-to-average acoustics (louder than I'm aiming for) even up to 175W, but that requires a very dense design, a copper-plated vapor chamber, and all the stops pulled. We're dealing with 120W here, though. Some stubby cards just use a radial heatsink with the large fins and no heatpipes, like an oversized stock Intel cooler. From the pictures I know the 2962 does better than that, but how much better?
 

images not exactly to scale relatively, but close
post edited by jamka - 2015/11/21 11:46:32
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    wmmills
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    Re: GTX 960 short (2962) vs. long (2963) cooling performance difference? 2015/11/20 10:37:45 (permalink)
    Heres a review that you can get those numbers from: https://www.techpowerup.com/reviews/EVGA/GTX_960_SSC_ACX_Cooler/28.html  As far as how loud the single fan card would be I would imagine that it would be slightly quieter since its only a single fan, but not by too much.... maybe 5 dbi. They both most likely run the same pwm controllers and they both will run within the same temp ranges for when the cards are in a cool idle state. I believe they are set to kick on at 60c, but you can always change that, the overclocking and the fans speed with MSI Afterburner or EVGA Precision tools.

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    #2
    jamka
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    Re: GTX 960 short (2962) vs. long (2963) cooling performance difference? 2015/11/20 11:23:40 (permalink)
    wmmills
    Heres a review that you can get those numbers from:   As far as how loud the single fan card would be I would imagine that it would be slightly quieter since its only a single fan, but not by too much.... maybe 5 dbi. They both most likely run the same pwm controllers and they both will run within the same temp ranges for when the cards are in a cool idle state. I believe they are set to kick on at 60c, but you can always change that, the overclocking and the fans speed with MSI Afterburner or EVGA Precision tools.


    Yeah, I'd seen the TPU review. Clearly, the heatsink on the shorter card is smaller. Generally for equivalent levels of cooling when given the same thermal load, hitting the same temperature, the larger heatsink with two fans will be able to operate the fans at lower speeds and result in a lower noise level. All else equal, obviously at equivalent fan speeds having two fans would be louder than one. If uncorrelated and not interacting with each other (a simplifying assumption to be sure, with two fans blowing into the same structure in such proximity), two noise sources should combine for a reading of 3 dB more than the single. But for real-world usage we're interested in a comparison with temperature constant, not fan rpm, so that's besides the point.
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    ty_ger07
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    Re: GTX 960 short (2962) vs. long (2963) cooling performance difference? 2015/11/20 17:37:12 (permalink)
    You have a good handle on the matter and make good points. I don't know if anyone here has compared the two side by side; so, I think your question is hard to answer. I will only provide my opinion since I have no real world experience on the subject.

    In my opinion, the longer card with two fans will be quieter in the same circumstances as long as your computer case has plenty of airflow. I think the card will tend to stay cooler and the fans will therefore spin more slowly. Additionally, the blower style single fan cooler tends to be kind of loud/hissy due to the high velocity airflow through the cooler. The double fan cooler has less air pressure and less air velocity.
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    jamka
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    Re: GTX 960 short (2962) vs. long (2963) cooling performance difference? 2015/11/22 00:21:17 (permalink)
    Bumping for the first and last time here, just in case somebody else might know something.
     
    Blower fans were never mentioned, to be clear. By "single" that means the model as depicted in the first post. Definitely not a blower.
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    ErinW
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    Re: GTX 960 short (2962) vs. long (2963) cooling performance difference? 2015/11/22 03:20:15 (permalink)
    I don't have solid numbers, but the ACX 2.0 card will be dead silent under normal or light use as the fans are stopped until the card reaches 62°C. The short single fan won't be as quiet, since the fan never goes below 25-30% speed, but you'll see that it has the same fan design as the other twin-fan card. Even at those speeds, it's barely audible up to about 50% speed. As it's a smaller card, with lower wattage, and less power phases as the 2963, it's also not going to get as hot.
     
    You might be able to hear a faint "woosh" sound from the fan on the 2962 if you stick your head in the case with the system powered on. If you're 2-3m away, you're not going to hear a thing.
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    jamka
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    Re: GTX 960 short (2962) vs. long (2963) cooling performance difference? 2015/11/22 08:08:27 (permalink)
    Major props, thanks for that. I was honestly not really expecting that much of an answer, just going fishing.
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    ErinW
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    Re: GTX 960 short (2962) vs. long (2963) cooling performance difference? 2015/11/23 03:33:42 (permalink)
    You're welcome. We're here to help if you need it.
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    jamka
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    Re: GTX 960 short (2962) vs. long (2963) cooling performance difference? 2015/11/25 19:01:59 (permalink)
    Okay, got the card in today (shipped unexpectedly quickly), a 2962. And apparently these do idle with the fan off.
     
    I haven't tested it all that much yet, but it went through 3DMark and Unigine just fine, and without the fan ever going above 1000 rpm. That was a pleasant surprise. I may tweak the fan curve later and power settings, throttling it down intentionally if necessary to keep fan speeds lower for prolonged CPU+GPU stress, but that may not even be necessary. Fingers crossed.
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