Review: CoolBook

Discussion in 'MacBook Pro' started by chendo, Feb 11, 2007.

  1. chendo macrumors member

    Joined:
    Nov 18, 2006
    #1
    I bit the bullet today and purchased CoolBook.

    It's been activated but I haven't rebooted yet cause I'm still doing work.

    I'll update this post when I have some results.

    EDIT1:

    Finally got it installed after a few hiccups. After first initial reboot, OS X said it didn't load properly for some reason. I tried loading manually with kextload, said something about permissions or ownership. Reinstall + reboot fixed that.

    TAKE THESE RESULTS WITH A GRAIN OF SALT. This is my first review of anything, ever. And I probably suck at benchmarking/testing, so there.

    Some info:

    I have a Macbook Pro Core 2 Duo 15", only upgrade is the extra 1gb stick of RAM.

    I use Fan Control, Base Speed is 2000 RPM, Lower threshold: 50C, Upper: 80C. Usual idle temp is 55C. Ambient temperature is 29.5C at the moment. I use MenuTemperature to monitor CPU temperature.

    At full CPU normally, fans ramp up to 6000 RPM and then temperature stays average at 73C after initial spiking up to 82C.

    I realise I should have tested my MBP more thoroughly earlier but I didn't bother.

    Test 1: Clock speed set to 1002mhz (1.0ghz) and voltage to 0.95v. Then I had two instances of 'yes > /dev/null' running, and the temp rose slowly to 60C, when the fans kicked in slightly, and now it's hovering at 58C.

    Verdict: Undervolting and underclocking most certainly worked, with fans not breaking 3500 RPM and temp still not breaking 60C.

    Test 2: (IN PROGRESS) Attempt to find ideal lowest voltage for highest frequency and see how it fares.

    Started off with 2.16ghz/1.1v. When maxed out, temperature hit 67C, with fans hovering at 4400 RPM. A definite improvement already with a 6C temperature drop and 1600 less RPM for the fans.

    Second try was 2.16ghz/1.05v. At max, temp was 65C, fans hovering at 4170 RPM. Another 2C off.

    2.16ghz/1.00v: When putting load on the CPU, around three seconds later it crashed and rebooted.

    2.16/1.025v: Temperature hit 65C, fan RPM hovering at 4150. Not much of a change, really.

    2.16/1.0125v: Temp is 63C, RPM 4050. Slight drop, but then crashed after I hit 'Save' on this post.

    I'd probably stay at 1.025v for stability.

    Verdict: Works quite well at dropping your temperature and fan speed.

    Test 3: (HALF COMPLETE) Test battery life with 1.0Ghz/0.95v.

    Brightness on 1 bar, wireless, bluetooth off, connected to the internet, Firefox, Adium, iTerm, MiniBatteryLogger on and it's giving me around 3:30 at the moment. I don't have time to time it exactly how long it takes to die, so it'll have to wait.


    Test 4: (NOT COMPLETE) Test battery life with 2.16Ghz/XXXv.

    Test 5: XBenches.
    1.0ghz/0.95v: 64.04
    2.16ghz/1.1v: 108.00
    More to be added later.
    Comments/suggestions/ideas for more tests?
     
  2. Fearless Leader macrumors 68020

    Joined:
    Mar 21, 2006
    Location:
    Hoosiertown
    #2
    Hmm. Interesting. Does it by any chance work the other direction?
     
  3. chendo thread starter macrumors member

    Joined:
    Nov 18, 2006
    #3
    Eh, what do you mean?

    EDIT: Realised what you mean. No, you can't overclock... limits are set by Intel.
     
  4. Fearless Leader macrumors 68020

    Joined:
    Mar 21, 2006
    Location:
    Hoosiertown
    #4
    darn.

    do some xbench tests at different speeds/ voltages.
     

Share This Page