MacTester57's HemiMac G4

Discussion in 'iMac Mods' started by MacTester57, Jul 21, 2013.

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  1. MacTester57

    MacTester57

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    Mobo:
    Z68MX-UD2H-B3, DQ77KB, NUC DC53427HYE, NUC D54250WYKH
    CPU:
    i5-2500K, i3-3225, i7-3770S
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    HD 3000, HD 4000, HD 5000
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    Nov 10, 2014 at 8:06 PM #231
    MacTester57

    MacTester57

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    Hi ersterhernd,
    I hope your HDMI mod does work.

    The HemiMac is now up and running again with a completely fresh Yosemite installation. After endless testing I've ended up with a MacBook Air 5,2 iMac13,1 SMBIOS and a new SSDT. Essential was to use the XCPM power management mode legacy power management mode in Clover.

    The CMOS battery cable was extended with an additional connector and the battery is now on the bottom of the optical drive. This would allow an easy CMOS reset if necessary again - fingers crossed!

    original battery connector:
    20141108-083776.jpg

    cut cable with duPont extension:
    20141108-083777.jpg

    soldered:
    20141108-083780.jpg

    re-assembled NUC:
    20141108-083782.jpg

    inside the Hemi:
    20141109-093801.jpg

    The battery is now accessible thru the maintenance opening:
    20141110-103802.jpg

    MacTester
     
    Last edited: Mar 7, 2017
  2. MacTester57

    MacTester57

    Joined:
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    Mobo:
    Z68MX-UD2H-B3, DQ77KB, NUC DC53427HYE, NUC D54250WYKH
    CPU:
    i5-2500K, i3-3225, i7-3770S
    Graphics:
    HD 3000, HD 4000, HD 5000
    Classic Mac:
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    Dec 21, 2014 at 2:57 PM #232
    MacTester57

    MacTester57

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    Mobo:
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    CPU:
    i5-2500K, i3-3225, i7-3770S
    Graphics:
    HD 3000, HD 4000, HD 5000
    Classic Mac:
    iMac, Power Mac
    Mobile Phone:
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    The Hemi is now running rock solid since a couple of weeks. So this is the hopefully final Clover configuration for the DC53427HYE NUC and Yosemite 10.10.1.

    Readme.txt from the attachment:

    Merry Christmas and a good new year to all
    MacTester
     

    Attached Files:

    Last edited: Dec 21, 2014
  3. MacTester57

    MacTester57

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    Mobo:
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    i5-2500K, i3-3225, i7-3770S
    Graphics:
    HD 3000, HD 4000, HD 5000
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    Dec 27, 2014 at 3:50 PM #233
    MacTester57

    MacTester57

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    Mobo:
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    Graphics:
    HD 3000, HD 4000, HD 5000
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    Today, I've made a short Youtube video summary of this project. Enjoy!




    MacTester
     
    Last edited: Mar 7, 2017
  4. dacooltech

    dacooltech

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    HD4000
    Feb 2, 2015 at 1:30 AM #234
    dacooltech

    dacooltech

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    Mobo:
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    MacTester57 - I also have a NUC DC53427HYE and finally figured out enabling Power Management with Clover, and getting all CPU P-states [ 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 (26) 28 ] .

    I'm using Clover 3128 and Bios 0038

    SMBIOS is currently Mac Mini 6.2 and only SSDT [based on PikerAlpha's ssdtprgen.sh] under Clover > ACPI > patched ... No DSDT!

    I wasn't able to boot the NUC with -xcpm enabled before. But after enabling KernelPM the -xcpm finally worked.

    Oh I also entered the CPU settings manually to CPU Config but that was because, the CPU was shown as 2.3GHZ under the system... So that's something I did earlier, meaning before enabling KernelPM & -xcpm and managed to get full P-states. Entering CPU settings manually didn't help the P-States (was getting between 8 and 17 before)... I will test without anything entered under CPU config and share results.

    Anyways here's the AICPUPMI results and attached is my config. Hope this info helps you with the XCPM issue and someone else.

    Geekbench results jumped from 1554/3258 to 2400/4840 since the CPU can now run up to 2.8GHZ turbo speeds...

    View attachment config.plist
     
    Last edited: Feb 2, 2015
  5. dacooltech

    dacooltech

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    Mobo:
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    HD4000
    Feb 2, 2015 at 2:23 AM #235
    dacooltech

    dacooltech

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    Mobo:
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    Graphics:
    HD4000
    FYI getting full P-States [ 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 (26) 28 ] without manually entering anything to CPU config. CPU speed is shown as 2.3GHZ under the system overview again though...

    Also updated Clover to v3142 ... All looks OK
     
  6. MacTester57

    MacTester57

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    HD 3000, HD 4000, HD 5000
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    Feb 8, 2015 at 9:21 PM #236
    MacTester57

    MacTester57

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    Graphics:
    HD 3000, HD 4000, HD 5000
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    Hi dacooltech and welcome to the community. Thanks for posting that.

    I will not change anything on the Hemi, because it's finally running fine (uses 5 p-states) and it was a real pain in the a.. to get this NUC working with 10.10.1... The DSDT is needed to enable USB 3.0 multiplexing.

    MacTester
     
  7. dacooltech

    dacooltech

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    HD4000
    Mar 8, 2015 at 4:28 AM #237
    dacooltech

    dacooltech

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    Mobo:
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    Thanks MacTester

    Quick Q BTW. What is the default CPU speed that you see under About This Mac ? 2.3GHZ ?
     
  8. golfleep

    golfleep

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    Jul 28, 2015 at 1:18 AM #238
    golfleep

    golfleep

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    Hi Mactester,

    Really enjoyed this thread, and looking to working on my own iMac. Can you tell me the resistor and potentiometer values needed to dim the CCFL (for a 17"). I'm going to opt for that route to keep things simple for now. Thanks!
     
  9. MacTester57

    MacTester57

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    Mobo:
    Z68MX-UD2H-B3, DQ77KB, NUC DC53427HYE, NUC D54250WYKH
    CPU:
    i5-2500K, i3-3225, i7-3770S
    Graphics:
    HD 3000, HD 4000, HD 5000
    Classic Mac:
    iMac, Power Mac
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    Aug 2, 2015 at 8:16 AM #239
    MacTester57

    MacTester57

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    CPU:
    i5-2500K, i3-3225, i7-3770S
    Graphics:
    HD 3000, HD 4000, HD 5000
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    iMac, Power Mac
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  10. golfleep

    golfleep

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    Aug 3, 2015 at 6:32 AM #240
    golfleep

    golfleep

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    Thanks for the info! I saw the your diagram (since I've been through your thread several times), but did not know what 6V8 and 3V3 meant at the time!

    Can I also ask - how did you cut the original iMac motherboard? Dremel or something similar?
     

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