Crazy (arguably stupid) new rig

Discussion in 'PC Hardware, Software and Displays' started by Mize, Mar 19, 2018.

  1. digitalwanderer

    digitalwanderer Dangerously Mirthful
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    BTW - I think you're the first paraplegic I've been jealous of since Stephen Hawking. :shock: :p <3
     
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  2. Entropy

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    If it manages no throttling, it’s quite impressive under any circumstances, but in that enclosure and quietly...?
    I need to check that system out.
    Thanks.
     
  3. Mize

    Mize 3dfx Fan
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  4. Grall

    Grall Invisible Member
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    Some people speculate that if the fans could be forced to spin faster (and more noisily), the thermals could be improved, and thus performance ceiling of the system could be raised. There are utilities around out there for fan control under MacOS I hear, but none were compatible at the time the iMac Pro came out.

    So if one can stand some ruckus, throttling might be improved. Not sure how much it would help the CPU though, because it has that infamous Intel heatspreader/TIM, but the Vega is a bare die and should be cooled more easily.

    Speaking of fan noise; it would be interesting to hear what kind of noise level might be worst-case in an iMac Pro, seeing as the casing is almost fully sealed (and largely made of stiff materials like cast metal and glass), and also, the exhaust vent is pointing away from the user at the rear of the computer. It might muffle fan noise from evil radial fans, one can hope.
     
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  5. Mize

    Mize 3dfx Fan
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    I'm curious about cleaning the airflow pathway.
     
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  6. Mize

    Mize 3dfx Fan
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    Ok, VR games play just fine. Whew.
     
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  7. Grall

    Grall Invisible Member
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    Indeed, that's a valid concern in a $5000 computer that Apple glued shut at the factory...
     
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  8. Pressure

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    The current iMac form factor has been around for a long time. Much improved cooling solution in the iMac Pro though.
     
  9. gamervivek

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    Is that the hotspot temperature? I've read that it throttles with hotspot temp around 115C, in my case I've seen it throttle with hotspot at around 110C even though the core temp. was barely over 70.
     
  10. Mize

    Mize 3dfx Fan
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    It's now on a paraplegic standing desk:
     
  11. Entropy

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    The extremely good thermal monitoring is a blessing, not a problem. Apple uses a metric crapton of thermal sensors in these systems. It’s another of those things that Apple does without getting any credit for it.
     
  12. Mize

    Mize 3dfx Fan
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    In case anyone was wondering what Entropy meant by a "crapton of thermal sensors":
    sensors.jpg
     
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  13. Mize

    Mize 3dfx Fan
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    The iMac Pro appears to have at least two GPU sensors: local board and die (note the 1080Ti is not connected owing to Appledickdom):
    heaven.jpg
     
  14. Grall

    Grall Invisible Member
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    Heh! A fair amount of sensors for sure! I wonder if you really need a sensor near every DIMM slot, but the more the merrier I suppose... :p That's a sweet monitoring program you have there by the way, what's it called?

    I've seen it stated that vega has a crapton of thermal sensors of its own (one might assume all decently complex ASICs these days do), but most of them appears to not be user accessible... In GPU-Z, all you have is a generic "GPU temperature" (which might even be a composite of a number of different sensors who knows), and then the "GPU hotspot", whatever that is. :p (Is one vega's hotspot the same as another's?)
     
  15. digitalwanderer

    digitalwanderer Dangerously Mirthful
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    I'm still drooling over all those temp sensors! As far as I'm concerned the more information like that available the more better, and that is by far and away the most impressive temp coverage I've ever seen!
     
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  16. Mize

    Mize 3dfx Fan
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    It's called istat menus and I think it's not cheap ($15), but it works wonderfully.
     
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  17. Mize

    Mize 3dfx Fan
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    At 4k max settings even!
    (Had to give it a whirl)
     
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  18. gamervivek

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    Apple isn't what I'm concerned about, it's AMD. The problem is that the temperature isn't exposed via AMD's wattman and it took me a couple of weeks to realize that the card wasn't dropping clocks due to instability while overclocking. Besides the delta being so large, that it crosses 100C on stock settings in no time.

    As for the apple thing, the sensors are from intel and AMD, I doubt apple are getting some custom hardware made for themselves.
     
  19. Mize

    Mize 3dfx Fan
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    Intel and AMD put sensors on DIMM sockets?
     
  20. nutball

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    Aren't they embedded within DIMMs these days? Or maybe that's only enterprise stuff.
     
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