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Recent content by rpster

  1. rpster

    The World's Most Powerful iMac G4...so far...

    @aquelito I opted for the relay mainly due to the fact I was more comfortable with it at the time. I may change this out to a MOSFET in the future
  2. rpster

    The World's Most Powerful iMac G4...so far...

    @aquelito Yes, your diagram looks correct. Also, be sure to get an appropriately size relay if you intend to use one that is already PCB mounted.
  3. rpster

    The World's Most Powerful iMac G4...so far...

    Correct. Soldered and heatshrinked/hot glued To be honest, I'm not sure. I have had multipacks of these laying around and just used them :p A random one I have :p It was difficult holding all three wires into place while crimping the terminal, so I soldered them together before crimping...
  4. rpster

    The World's Most Powerful iMac G4...so far...

    @aquelito The area around the relay is pretty tight so there really isn't a clear shot of all the connections. To the left, beside the wi-fi antenna, is the relay. The FASTON connectors are pointing towards the camera, with the trigger side connections facing away. At the top you'll spot the...
  5. rpster

    The World's Most Powerful iMac G4...so far...

    I used an OMRON G4A-1A-E 12VDC 20A Relay I'm calculating that MOSFET to be dissipating about 1.4W @ 12.5A (150W @ 12VDC for a GTX 1070). It might be a good idea to sink it to a heatsink or to your chassis to keep temps closer to ambient. Not sure if you're planning to go fanless or not, but...
  6. rpster

    The World's Most Powerful iMac G4...so far...

    @colingmo @68Electra Since there's really only two fans for the whole system, it isn't very loud. I opted for a 120mm fan at the top for better airflow at lower rpms (less noise). The 90mm Noctua fan on the CPU cooler is occasionally audible at high load. @Cang @aquelito Further explanation of...
  7. rpster

    The World's Most Powerful iMac G4...so far...

    The fan is first cut away from the frame near the rotor (had to commit to possibly destroying the fan). I then mounted it with 3M VHB tape onto an FR4 board that is custom cut to line up with the original fan mounting holes on the GPU heatsink. The original GPU fan screws are used to secure the...
  8. rpster

    The World's Most Powerful iMac G4...so far...

    The World's Most Powerful iMac G4...so far... What does that mean, "most powerful"? Is it processing power? Power consumption? Graphics power? This build is a two-year culmination of a project that attempts to answer just how much power you can fit in an iMac G4. Ok...pretty par for the course...
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