PC Airflow

Discussion in 'OT Technology' started by Repentinus, Jun 27, 2007.

  1. Repentinus

    Repentinus New Member

    Joined:
    Aug 13, 2005
    Messages:
    586
    Likes Received:
    0
    Location:
    Lawton, OK
    What is a safe way to detect the airflow in your computer? Kinda like sending smoke through it. I want to make sure I'm not getting any dead spots but obviously I don't want to send cigarette smoke through it. (I don't even smoke but it was the only reference I could think of.)
     
  2. lowfat

    lowfat 24/Mac/SciFi/PC Crew OT Supporter

    Joined:
    Oct 27, 2003
    Messages:
    63,949
    Likes Received:
    0
    Location:
    Grande Prairie, AB, Can
    incense? just blow the case out with compressed air afterwards.
     
  3. Krazy

    Krazy OT Supporter

    Joined:
    May 18, 2007
    Messages:
    5,094
    Likes Received:
    55
    Location:
    miami beach
    BONG HITS
     
  4. XR250rdr

    XR250rdr OT Supporter

    Joined:
    Mar 1, 2004
    Messages:
    24,487
    Likes Received:
    22
    Location:
    Ca
    It would be a lot easier to do temperature measurements in different spots in the case than airflow characterization.
     
  5. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    thermal laser.
     
  6. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    As previously noted, it would be better to measure the temperature of various components with an infrared thermometer, and direct air at those spots, rather than worrying about having uniform airflow. Uniform airflow is by no means a guarantee of adequate cooling.
     
  7. RiSk

    RiSk New Member

    Joined:
    Jun 8, 2004
    Messages:
    6,564
    Likes Received:
    0
    Location:
    Irving, Texas
    Umm I use a fluke device that has 25 probes and place them in random places inside the case. Easiest way we have found to do it
     
  8. Bigsnake

    Bigsnake OT Supporter

    Joined:
    Nov 30, 2003
    Messages:
    34,557
    Likes Received:
    0
    Location:
    Baton Rouge
    Unless you see specific components getting hot, then I wouldn't worry about it.

    Also, the closed case will have different flow characteristics than open, but I'm sure you knew that so, if taking temps with an IR sensor, do it through a window or let the computer run away closed, then open it and quickly take some temps.
     
  9. mobbarley

    mobbarley Active Member

    Joined:
    Mar 4, 2005
    Messages:
    9,256
    Likes Received:
    2
    Location:
    Sydney
    finely ground radioactive particles. if you can find ones strong enough you can take pictures with any digital camera :eek4:
     
  10. XR250rdr

    XR250rdr OT Supporter

    Joined:
    Mar 1, 2004
    Messages:
    24,487
    Likes Received:
    22
    Location:
    Ca
    That is the way I would do it. A 25 port thermocouple unit would be killer.
     
  11. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    Step back a bit. A 25-sensor thermocouple is a great solution, but it's only practical for someone who's going to be doing this kind of analysis all the time. For casual use, the IR thermometer is much more practical.
     
  12. Sphere

    Sphere New Member

    Joined:
    Aug 8, 2006
    Messages:
    93
    Likes Received:
    0
    So much for blowing smoke up a PCs ass.
     
  13. mobbarley

    mobbarley Active Member

    Joined:
    Mar 4, 2005
    Messages:
    9,256
    Likes Received:
    2
    Location:
    Sydney
    IR thermometers are really only good at measuring the temperatures of surfaces.
     
  14. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    Right...

    Last time I checked, the electronic components that need to be kept cool do in fact have surfaces, so it's all good. Don't worry man, I thought good and hard before agreeing with Jolly.
     
  15. mobbarley

    mobbarley Active Member

    Joined:
    Mar 4, 2005
    Messages:
    9,256
    Likes Received:
    2
    Location:
    Sydney
    the poster mentioned airflow... for that you want an anemometer, not very useful inside a PC.

    Dead spots could cause hot pockets of air which would be picked up by thermocouples, but probably not by an IR detector.

    Or you could just get any half reasonable case, preferably with front, rear & top fans and forget about the whole issue :dunno:
     
  16. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    The airflow is irrelevant so long as all components are adequately cooled. The computer wouldn't need any fans at all if it were sitting outside at the South Pole, and conversely the computer could be kept in an oven so long as it doesn't overheat and shut off.

    Granted, those are absurd examples, but the concept is the same: insufficient airflow is a possible cause of overheating, but if there is no overheating then the airflow is by definition not insufficient. He needs to see if anything is overheating first, and then direct more airflow at the affected components, assuming there are any.
     
  17. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    the fact that airflow mentioned is not the issue. The poster really doesn't know what they're doing... Airflow is an *indirect* effect. Really, they care about cooling -- airflow is just what they think about when they want cooling.
     
  18. mobbarley

    mobbarley Active Member

    Joined:
    Mar 4, 2005
    Messages:
    9,256
    Likes Received:
    2
    Location:
    Sydney
    agreed, which is why i said and anemometer would be useless inside a PC. I have no idea what deusexaethera is going on about.
     
  19. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    Are you a fucking idiot or something? I was saying the exact same thing Jolly said, and I was recommending the exact same device he did. Take a double-dose of Adirol and re-read the thread.
     
  20. mobbarley

    mobbarley Active Member

    Joined:
    Mar 4, 2005
    Messages:
    9,256
    Likes Received:
    2
    Location:
    Sydney
    my mother says that i am very smarts :mamoru:

    I tuned out at south pole and ovens :ugh:
     
  21. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    That's your problem.
     
  22. Doomsday

    Doomsday XXX

    Joined:
    Mar 14, 2000
    Messages:
    14,902
    Likes Received:
    0
    Location:
    Minnesota
    you can buy one of those smoke spray cans (usually used to test smoke detectors or for fog/mist special effects.) hardware stores or craft stores have them.

    here's a vid about pc case airflow and he used one of those smoke spray cans
    http://www.g4tv.com/lv3/7505
     
  23. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    Most intriguing.

    What you forgot to mention was the bit about having to cut the side of your case off, though.
     
  24. Doomsday

    Doomsday XXX

    Joined:
    Mar 14, 2000
    Messages:
    14,902
    Likes Received:
    0
    Location:
    Minnesota
    no need to cut anything if he has a side panel with glass window like the pcs in that video.

    it's a safe assumption that he has one (along with some LED fans) if he's concerned enough about dead spots.

    plus he did think of the cigarette smoke thing,.... something that he can inspect visually :dunno:
     
  25. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    I do NOT recommend those. Moisture can cause shorts or electrical failure.
     

Share This Page