Overclocking an eMac 800MHz

Discussion in 'Modding' started by the Fan-Man, Oct 2, 2009.

  1. the Fan-Man

    the Fan-Man Member

    Joined:
    Jun 16, 2009
    Messages:
    1,569
    Location:
    Botany Bay NSW
    Story:
    At uni - im doing a lecture called: software application. where 4 weeks ago we learned that a hard drive is a library of data and the computer revolves around the cpu (which it certainly does not. it revolves around the nth/sth bdge in a flow diagram aswell).

    so - we had an assignment 1 on what is a cpu. what does RAM stand for. what does a power supply do? ect... (im doing a music course. this is just basics of computers we all have to know). the next assignment is to make a song in Garageband. nothing glorious or fancy - just has to meet criteria of atleast 9 tracks, reverb, editing.... ect... to show you were paying attention in lectures and can demonstrate how to use garageband.

    now. the problem is. at uni it pretty much run by Lenovo and HP. the only macs that are there are the new C2d silver/black ones and laptops.

    real issue is: you can only use the C2D midi lab comps if you are in a course that requires them. and the laptops for hire are ALWAYS out (mac pros). they were backlogged in hire for up to 3 weeks. and assignment due in 1.5 weeks :Paranoid:

    So i went to work and asked if i could buy a hell old eMac. i got my hands on the following:


    Click to view full size!



    Click to view full size!


    eMac G4 800MHz
    256MB PC 133
    40GB Maxtor
    10.3

    i ran garageband on this and it became devilishly slow. would start to crash after 4 tracks were added :mad:

    So i decided to Overclock it
    Yes - overclocking an old mac :weirdo: music to my ears

    a friend emailed me an overclocking guide a few months ago but i couldnt track it back to its source.

    so i took the lid off.

    Click to view full size!



    Click to view full size!



    Click to view full size!


    and removing the CD drive game me access to the motherboard. The motherboard has a series of jumpers on it that control the multiplier for the motorola 7554 cpu. its current configuration is 0/0/1/0/1 which gives out 800MHz. the combination i wanted (to give 1.40GHz) is 0/1/1/1/0. these numbers 1 and 0 represent little resistors on the mainboard. they have no value. but bridge connections. jumpers (soldered point on the mobo) with a 1 mean they are linked. 0 means they are not.

    to get the combination of 0/1/1/1/0 i needed to remove point 5 and bridge 2 and 4

    but this was harder as i got closer. The jumper resistory things are absolutely tiny. to give an idea:

    on the left we have a 20c coin. on the right we have the resistor/bridges.

    Click to view full size!


    and to make it harder. all i had was a $19.95 bunnings soldering iron and very very little skills with soldering.

    so i used a dremel piece to sharpen the end of the iron till it was as sharp as i could get it. and i stickytaped the iron to a power-supply (to hold it steady) as this was extremely delicate work


    Click to view full size!


    and began removing point 5


    Click to view full size!


    i found a lead acid battery and a motorcycle headlamp in the shed (nfi where it came from) hooked them up and used them as extra light.


    Click to view full size!


    and started work bridging point 2 and later point 4


    Click to view full size!



    Click to view full size!


    after all that. i decided to replace the CD drive with a DVDRW combo drive, just simply replace and remove bezel (as it has to push the little flap open at the front of the mac)

    also removed the 2 x 128MB sticks of ram and put 2 x 512MB PC 133 in there


    Click to view full size!


    put it back together


    Click to view full size!


    cleaned the screen and booted it up!


    Click to view full size!



    Click to view full size!


    the above pic ^^ problem was resolved when updating OSX 3.1

    ran it via external to my main LCD:


    Click to view full size!


    and i was free to write some corny music!!!! (i bough ilife from work as well)

    overclocked to 1.40GHz and ran 12 tracks stable !!!!!!! :D :D

    costs:
    mac (work) $15
    iLife (work) $5
    soldering iron $19.95
    effort: priceless :)

    if i can find a way to host a music file MP3 ill post the song i made :D its sooo corny its funny

    EDIT:

    You can find that song here
    NB: it was Garageband 1. it had crap all tracks. so most of them were made with midi keyboard and editing (scissor icon thingy).
    double NB: if you understand classical music, you will appreciate the chords i managed to use with the keyboard. which is why unlike other Garageband song of our class *random crap put together* this one actually has momentum :D


    tFM
     
    Last edited: Oct 2, 2009
  2. elstado

    elstado Member

    Joined:
    Feb 10, 2009
    Messages:
    1,393
    Location:
    NSW
    Dude that's epic, bravo!

    PS- What are the temps like now? Considering it's a rather big OC for the type of processor and that it is in a squishy case.

    PPS- Post the song you made for sure.
     
  3. Dexamenus

    Dexamenus Member

    Joined:
    Nov 2, 2008
    Messages:
    751
    Location:
    Adelaide
    haha nice one mate, cant believe it worked so well :p

    cant believe you managed to solder those jumpers
     
  4. OP
    OP
    the Fan-Man

    the Fan-Man Member

    Joined:
    Jun 16, 2009
    Messages:
    1,569
    Location:
    Botany Bay NSW
    i dont know the temps, i dont think i can access the temp control through the computer, tho the air it pushes out is fairly hot. but it runs stable. even if you go to *applications. Apple A + apple O*

    :D - thats my stress testing!
     
  5. JuzIE

    JuzIE Member

    Joined:
    Nov 22, 2008
    Messages:
    849
    Location:
    Sutherland Shire, Sydney
    LOL gold mate :thumbup:
     
  6. Autti

    Autti Member

    Joined:
    Aug 27, 2009
    Messages:
    6,570
    If you can do that, why are u taking such a basic uni unit haha. Very impressive.
     
  7. LeadAccelerator

    LeadAccelerator Member

    Joined:
    Aug 10, 2008
    Messages:
    837
    Location:
    Adelaide
    So does this mean you have turned your Apple into a Pear (I like Pears more than Apples)? :D
     
  8. OP
    OP
    the Fan-Man

    the Fan-Man Member

    Joined:
    Jun 16, 2009
    Messages:
    1,569
    Location:
    Botany Bay NSW
    hahah thanks.. its a compulsory unit everyone has to take - which teaches all of us what computers are and how they work

    :D

    i found the song on my computer now i just need to find a place that hosts mp3s for free

    also ^^ i forgot to add = i bumped up the memory to 1GB
     
    Last edited: Oct 2, 2009
  9. HeXa

    HeXa Member

    Joined:
    Jul 7, 2001
    Messages:
    10,216
    Location:
    Canberra, ACT
  10. OP
    OP
    the Fan-Man

    the Fan-Man Member

    Joined:
    Jun 16, 2009
    Messages:
    1,569
    Location:
    Botany Bay NSW
    Last edited: Oct 2, 2009
  11. Tool3y

    Tool3y Member

    Joined:
    Feb 20, 2008
    Messages:
    179
    Location:
    North East Victoria
    your a legend :D i have a few of those lying around here from a clients school

    gotta replace a fair few blown capacitors so i could do this while im at it... and if i screw it up... FISH TANK :D
     
  12. daza_x

    daza_x Member

    Joined:
    Mar 18, 2003
    Messages:
    5
    This was actually a sweet mod. As you can see I never post here but this was worthy of a thumbs up. Great effort, this should be an addendum to your assignment :)
     
  13. OP
    OP
    the Fan-Man

    the Fan-Man Member

    Joined:
    Jun 16, 2009
    Messages:
    1,569
    Location:
    Botany Bay NSW
    the easiest one to do is the 1.06 GHz one. only bridging no removing :D

    tho id never do this again. it was a serious gamble with time against the assignment ;)
     
  14. sammy_b0i

    sammy_b0i Laugh it up, fuzzball!

    Joined:
    Jun 29, 2005
    Messages:
    3,520
    Location:
    ACT 2913
    Nice job man! When you're done with it, PM me. Do want :p
     
  15. OP
    OP
    the Fan-Man

    the Fan-Man Member

    Joined:
    Jun 16, 2009
    Messages:
    1,569
    Location:
    Botany Bay NSW
    problem is - you're near Coffs harbour and im located in perth
     
  16. Pablo_H

    Pablo_H Member

    Joined:
    Jul 13, 2002
    Messages:
    2,766
    Location:
    wa
    ha Ha, great.
    At worst, I've only had to bother with dips and jumpers.
    Good work.
    Concerto for YOUR MUM :lol:
     
  17. millsy_c

    millsy_c Member

    Joined:
    Mar 31, 2007
    Messages:
    12,614
    Location:
    Brisbane
    Well done! This is overclocking :thumbup::D
     
  18. sammy_b0i

    sammy_b0i Laugh it up, fuzzball!

    Joined:
    Jun 29, 2005
    Messages:
    3,520
    Location:
    ACT 2913
    How much does it weigh? :p
     
  19. flyingracoon72

    flyingracoon72 Member

    Joined:
    Aug 16, 2008
    Messages:
    209
    Location:
    Melbourne
    Sir, I am about to award the Highest honor I can Bestow. +1 Internets to You.

    That is a truly amazing task, this deserves to go on the front page.

    Kudos, Kudos.
     
    Last edited: Oct 3, 2009
  20. elstado

    elstado Member

    Joined:
    Feb 10, 2009
    Messages:
    1,393
    Location:
    NSW
    +1

    One of the cooler projects I have read in a while.
     

Share This Page