Power Mac Dual 1.8 G5

Discussion in 'General Mac Discussion' started by Brother Michael, Aug 16, 2004.

  1. Brother Michael macrumors 6502a

    Brother Michael

    Joined:
    Apr 14, 2004
    #1
    Alright I am sure this has been brought up before...but I can't find it.

    Why is the new 1.8 G5 crippled compared to the old 1.8 G5?

    Mike
     
  2. King Cobra macrumors 603

    Joined:
    Mar 2, 2002
    #2
    Piss-poor graphics cards, much worse than the previous dual 1.8 model had. I don't really care about it (luckily), but I'm sure that others that are/were fumed by the graphics card downturn would be more than happy to fill you in on the other details.

    With that being said: The specifics on Apple's website say: "NVIDIA GeForce FX 5200 Ultra with 64MB DDR SDRAM" - also true for the new dual 2.0GHz model.
     
  3. keysersoze macrumors 68000

    keysersoze

    Joined:
    Jan 6, 2004
    Location:
    NH
    #3
    4 RAM slots, down from 8.
     
  4. keysersoze macrumors 68000

    keysersoze

    Joined:
    Jan 6, 2004
    Location:
    NH
    #4
    Same old 970 processor, at this point. Not the new 970fx which is shipping in the higher end models.
     
  5. Brother Michael thread starter macrumors 6502a

    Brother Michael

    Joined:
    Apr 14, 2004
    #5
    errm...lemme rephrase this one...what was the reasoning behind it?

    Too good of a computer for the price?

    Mike
     
  6. paxtonandrew macrumors 6502

    Joined:
    May 10, 2004
    Location:
    I Come From A Land Down Under
    #6
    With the release of the 2.5 ghz G5, there needed to be a low end model to replace the outgoing 1.6ghz, so apple took the logical idea of downgrading a once middle end G5 to a low end. Not to say there is nothing wrong with the computer (and there is nothing wrong with the computer, but with the lack of Ram slots and PCI/X slots, the computer would be good for a fast family computer, or slow graphics computer. If you were to buy one, I would look at the Rev A. systems, as they have similar additions as the current 2.0 ghz models.

    Hope this helps
     
  7. Brother Michael thread starter macrumors 6502a

    Brother Michael

    Joined:
    Apr 14, 2004
    #7
    Yea, I was looking at an older one simply because the new one looks like it is less than good...

    However, due to the whole idea of money and that fact that I do not have a lot of it...I will probably get a single 1.6 G5...as they go for about 1500 now.

    We shall see.

    Mike
     
  8. alexf macrumors 6502a

    alexf

    Joined:
    Apr 2, 2004
    Location:
    Planet Earth
    #8
    Do all of the Rev. B 2.0 GHz machines have the 970fx, or does only the 2.5 GHz have this newer chip?

    Also, how can one tell which chip one has in his/her computer?
     
  9. alexf macrumors 6502a

    alexf

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    Apr 2, 2004
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    #9
    No, actually I believe that the new 1.8 GHz Dual kept the same graphics card but the 2.0 GHz model was downgraded.
     
  10. Sun Baked macrumors G5

    Sun Baked

    Joined:
    May 19, 2002
    #10
    Only the 2.5GHz machine had it initially, the Japanese Apple Marketing guy set the record straigh at the beginning -- but I just saw the translation recently.

    The 2.0GHz machine just started showing up with the 970fx, the 1.8GHz machine is an unknown.

    Here's the scoop, mainly it's the lack of the HT PCI-X Tunnel that makes the machine different from any other -- the old SP1.6 PM had the HT PCI-X Tunnel, but used resistors on the motherboard to keep the HT PCI-X Tunnel at PCI speeds (considering some SP1.8PM boards were shipped as SP1.6PMs).

    [​IMG]

    So you cannot play with the resistors to boost the speed of the PCI on the new DP1.8PM machines. :(
     
  11. alexf macrumors 6502a

    alexf

    Joined:
    Apr 2, 2004
    Location:
    Planet Earth
    #11
    Thanks for the reply and the diagram...

    I happen to have a 1.6 GHz machine. Does that mean that I can play with the resistors and increase the speed?
     
  12. Sun Baked macrumors G5

    Sun Baked

    Joined:
    May 19, 2002
    #12
    Probably, depends on who made the HT PCI-X tunnel.

    If it's the AMD-8131 (pdf)...
     
  13. keysersoze macrumors 68000

    keysersoze

    Joined:
    Jan 6, 2004
    Location:
    NH
    #13
    Courtesy of Shadowband:

    1) bring up a terminal window (Applications/Utilities/Terminal)
    2) enter the following:

    ioreg -l | grep cpu-version

    A CPU version of <003c0300> equates to PowerPc 970fx rev 3
    A CPU version of <00390202> equates to PowerPc 970 rev 2.2

    Note: two entries will be output since rev b powermacs are all DP.

    :)
     
  14. alexf macrumors 6502a

    alexf

    Joined:
    Apr 2, 2004
    Location:
    Planet Earth

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