Fastest G4 Processor?

Discussion in 'PowerPC Macs' started by mryingster, Dec 9, 2016.

  1. mryingster macrumors regular

    mryingster

    Joined:
    Feb 1, 2013
    Location:
    California
    #1
    I have a digital audio that I keep around from when I was in High School. I built it from parts I bought on eBay. It has a sonnet processor, 1.25GHz I believe. It's been a great computer to keep around for fun and nostalgia.

    I was wondering what the options are for the fastest PPC that one can buy. I'd love to get a Dual MDD. Was there ever a processor upgrade that would bring them faster than the stock 1.25 GHz? I thought I saw a dual 2.0 GHz upgrade card back in the day, but current documentation on upgrades seems to be scant.

    Whats the fastest people are running here on MR?
     
  2. eyoungren macrumors Core

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
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    #2
    I have a Sonnet Duet 1.8Ghz Dual in my Quicksilver. It's great when the Mac is running, which it isn't at the moment.

    Fastest G4 Apple made was the 1.42 7448 for the MDD.
    Fastest G4 Sonnet made was the dual 1.8Ghz 7447 (which is what I have).

    Newertech made the MaxPower MAXG48D1800 which is a 1.8Ghz 7448. Ultra rare, ultra hard to find, ultra expensive.

    Newertech also made a single 2.0Ghz 7448 processor. Those are easier to find, but still expensive.

    The difference between the 7447 and the 7448 is cache. The 7447 processors have no L3 cache as they were originally intended as laptop processors. Sonnet just paired them, overclocked them and sold them as dual processors for the desktop line. The 7448 has L3 cache. But not many were made.

    Hope that helps.
     
  3. mryingster thread starter macrumors regular

    mryingster

    Joined:
    Feb 1, 2013
    Location:
    California
    #3
    That's awesome information! Thanks. I'll have to keep my eyes on eBay for one of those processors. How much of a difference does the L3 cache really make in everyday use?
     
  4. bunnspecial macrumors 603

    bunnspecial

    Joined:
    May 3, 2014
    Location:
    Kentucky
    #4
    The 7448 doesn't have L3 cache, but does have 1mb of full speed L2 cache. In the real world, this makes a big difference.

    Single and dual 7447A based 1.8ghz processors of varying quality are not that uncommon. If you want reliability, keep your eyes open for Sonnet and Newertech.

    I have a single 2ghz 7448 Newertech. It's VERY peppy for single threaded tasks(it could probably at least trade blows with a single 1.8ghz G5). I'm not aware of a dual 2ghz, but there is a dual 1.8ghz 7448 out there, albeit it's difficult to find. It's also a desirable Cube processor, which brings the price up.
     
  5. eyoungren macrumors Core

    eyoungren

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    #6
    My misatake! Thanks Bunn!
     
  6. LightBulbFun macrumors 68000

    LightBulbFun

    Joined:
    Nov 17, 2013
    Location:
    London UK
    #7
    The fastest PowerMac3,1-3,5/5,1 G4 CPU Upgrade ever made was as ben said a Dual CPU 1.8Ghz 7448 CPU card.
    the fastest PowerMac3,6 G4 CPU upgrade ever made was a dual 7447A 1.8Ghz Sonnet with 512KB L2 per cpu (but the Stock Apple Dual 1.42Ghz 7455B with 256KB L2 and 2MB of L3 per CPU can be just as fast if not faster in some situations)
    the fastest G4 ZIF ever made was a 1Ghz 7455A sonnet with 256KB L2 and 1MB L3
    The fastest PowerSurge G4 (7300-9600) made was a very rare 1Ghz 7455 Sonnet with 256KB L2 and 2MB L3 Cache

    theres a Quick and dirty overview of the fastest G4s made by CPU upgrade companies
     
  7. mryingster thread starter macrumors regular

    mryingster

    Joined:
    Feb 1, 2013
    Location:
    California
    #8
    Wow! Very comprehensive. I got one of the ZIF upgrades for my B/W G3 that upgraded it to a 500 MHz G4. I didn't know that they made one that went all the way up to 1GHz. That's pretty awesome.
     
  8. bunnspecial macrumors 603

    bunnspecial

    Joined:
    May 3, 2014
    Location:
    Kentucky
    #9
    I humbly present "the beast"

    IMG_3568.jpg IMG_3566.jpg IMG_1910.JPG IMG_1911.jpg IMG_3567.jpg IMG_3569.jpg
     

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