Loaded Mini - Actual tests. HOT CPU

Discussion in 'Mac mini' started by dasx, Nov 2, 2012.

  1. macrumors 65816


    Hey there. I received today my Mini. i7 2.6GHz with 4GB of RAM (which I upgraded to 16GB) and the 256GB SSD.

    Didn't really wanna just run Geekbench as I can go and check results on their site, and that number doesn't tell me anything, so prepared a couple of -silly- tests of stuff I do everyday to compare processing times.

    Machines in comparison:

    Mac Mini 2010: Core2Duo 2.4GHz, 4GB RAM, 500GB HDD.
    Macbook Air 2012: i5 1.8GHz, 4GB RAM, 128GB SSD.
    Mac Mini 2012: i7 2.6GHz, 16GB RAM, 256GB SSD.

    I know these are a bit silly tests, but this is the way I found to see how much of an improvement I'd actually notice from the upgrade: Doing regular tasks I do.

    Cheers! :eek:
  2. Guest

  3. macrumors 6502

    I wouldn't say silly at all, if these are real world for you, then they are much better than GB or other metrics. Enjoy!
  4. macrumors 65816

    did your fan kick on high too?
  5. macrumors 6502

    I had purchased one of the quad i7 Mini servers last year when they came out solely to run Handbrake 24/7. I too noticed how hot the CPU would get and the fans would run full blast. I returned it and went the refurb base model iMac and its runs much cooler/quieter when doing encodes.

    I was hoping the heat issue was resolved with the different Intel chipset, but it seems like quad i7 CPUs are just a bit too hot to run all the time.
  6. macrumors 6502a

    I guess the heat problems arising from TurboBoost in Sandy Bridge were not solved in Ivy Bridge, actually maybe even worse with Ivy's die shrink. Would hope for better cooling, but only so much you can do with the Mini form factor. Maybe they went to the asymmetrical fan that's in the rMBP, although may not help with flow, only quietness. Well, this could also be a result of global warming too, as Al Gore said, it's hot out!
  7. macrumors 65816


    Actually... pretty high. I was monitoring the speed of it too and it went up to almost 4000rpm during the handbrake test. It still had a margin till the maximum speed of 5500rpm, but the damn fan was very loud.

    Yup. I didn't do handbrake for 24/7 except for a couple of times with my old mini, but now that I've seen how hot this gets and how loud the fans sound... I probably never will.

    When I use handbrake is usually to convert a file I can't convert with Subler, which isn't very often as I try to make/get everything in h264 already so in this case it's good to have such a powerful CPU.

    But for 24/7... too loud. I wouldn't say too hot, as my old mini got to 91-94ºC during Handbrake, which isn't that far away from 105ºC, problem are the fans. Way too loud.
  8. macrumors newbie

    I bought the mid range mini 2.3 i7 and at the moment sitting at 4GB of RAM. (Waiting for the 16) to use just for handbrake encodes specific. I ran a couple of 720p encodes and noticed that the mini did get a little warm, but nothing offensive or bothering. I can't say that I actually heard the fans disturbing me at all with being loud. (It sits right in front of me on the desk.)

    Nevertheless, I decided since I was going to be using my mini as an encoder that I should look into some methods of keeping it cool. So I picked up a Notepal I 100 (http://www.coolermaster-usa.com/product.php?product_id=3107) for like $15.00. Looks great and the mini sits right overtop the fan. This works really well even if I didn't have the Notepals' fan on, as it keeps the mini raised from the surface of the desk.

    I'm now doing my third encode in a row without break of 1080p using handbrakes AppleTV 3 preset. I also installed iStat Menus to watch the CPU usage, and also the internal temp, plus fan exhaust rpm. It's taking roughly 1hr 45mins to complete the encode. It is using all 8 cores at pretty much full (System Activity monitor says handbrake using 776% - 790% CPU. The internal tempature hasn't gone above 94c and the exhaust rpm is around 3400.

    So really, not that bad. I can put my hand on the mini and barely feel any heat at all. If I find it starts running way too hot, I'll just limit the CPU cores used via handbrake advance setting. My only real issue is with Handbrake, it's gobbling up every last bit of RAM it can get! :confused:
  9. macrumors 65816


    It'd be interesting to see actual temperature differences using the pad and not in a lets say 3h 1080p encode with Handbrake.

    Now they're idle and at 38-40ºC. (100-104ºF). Pretty cool.
  10. macrumors 65816


    Actually, what I do most is "Test 5" related stuff. So that CPU helps a lot there. :)
  11. macrumors 68000

    Hot does not matter. Intel monitors its CPU very well, and when "too" comes in ranch, it will adjust speed.

    Please run Cinebench 11.5 for GPU performance. Nobody here did that yet :(
  12. macrumors 65816


    OK. Downloading.
  13. macrumors 65816

    take off the plastic cover at the bottom of the mini and place the mini on its side, you will see a drastic reduction in temperature.
  14. macrumors 65816


    Yeah I guess. I just don't wanna have to live with a vertical and bottom-naked mini. :/

    I'll try raising it a little bit with some little rubber pads.


  15. macrumors 65816


    Understandable. I raised my 2010 with two 7cm styrofoam blocks. One on either side right and left. When encoding stuff CPU temps went from 87°C with 4000rpm fans down to 65°C and 2200rpm fans. Pretty good.
  16. macrumors 603


  17. dasx, Nov 3, 2012
    Last edited: Nov 3, 2012

    macrumors 65816


    You serious? From 87ºC to 65ºC?? WOW. That's amazing. Will try to lift it tomorrow with anything and if I get that result I'll find a way to make it look nice.

    EDIT: Did a quick test. Lifted it up around 2cm and didn't really see any change. :/
  18. The-Pro, Nov 3, 2012
    Last edited: Nov 3, 2012

    macrumors 65816

    Yeah man, im not kidding. Ill post some screenshots, ill do it again

    Weird. Well it takes a while for it to go down. I don't know how it is with the newer minis. Mine is a 2.4 C2D. They produce less heat then the i7's etc.

    Here you go:
    1st screenshot. bottom panel on, 25 mins after I started maxing out the CPU's with a handbrake encode.
    2nd screenshot. took off the bottom panel, stood mini on its side, kept handbrake going. Screenshot taken 15 mins after bottom panel was taken off.

    Attached Files:

  19. macrumors 65816


    Ahhh. I thought you meant you got that temp drop just by raising the Mini 7cm. I can understand 20ºC difference by taking off the bottom and putting it on its side.

    I'll try to do some serious tests this week. Raising it around 3-5cm and see what happens.
  20. macrumors newbie

    Since lots of people recommends this I decided to give shot. And yes, my mid 2011 became noticeably silent. Now I think I can wait till Haswell for my upgrade :)
    Noise was the only issue for me with my current Macmini and I did not want to loose dedicated graphics because of Madvr.

    Now the new issue is dust since I removed the buttom cover. I guess i will build my own DIY air filter ;)
  21. macrumors 65816


    An idea that crossed my mind was getting the bottom cover (here for instance), drill a hole right were the fan is and put some kind of filtering paper or something.
    The just raise the Mini and voila, a more cooled Mini without having to lose appearance and having to leave it bottom-naked.
  22. macrumors newbie

    Thanks for the suggestion. I think I will gowith this one .
    For the riser I'm already started to usemy rMBP rubbers ;)
  23. macrumors 65816


    Do you know btw (or have any way to check it) if the 2010 Mac Mini bottom cover is compatible with the 2012 model? I'm saying this because didn't find any specific 2012 Mini bottom cover. Just 2010.

    And which are the results? Any noticeable differences?
  24. thedenethor, Nov 4, 2012
    Last edited: Nov 4, 2012

    macrumors newbie

    Yes they are compatible just tried that to confirm. (I'm still keeping my 2010)

    Edit: Upps sorry I can only say that 2010 and 2011 covers are compatible. I do not have 2012 to test.

    For the rubbers yes they did the job. It s not %100 silent but good enough. You can't hear the fans from 3-4mt while Plex or Dvblink doing real time transcoding. Fans are at 3000 rpm. If you need 2000-2500 rpm you may need higher hills. Will do the test during night since the environment more silent. After that test I'll make my conclusion.
  25. macrumors 68020


    That's interesting. Performance is great for an entry level product, but cooling is a decisive factor in any computer's lifespan.

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