memtest peg1 versus peg2
  • Priest of the Order of the Butterfly
    Priest of the Order of the Butterfly
    MarK
    Posts: 641 from 2004/1/25
    From: Prague, The Cz...
    hello there,

    i have here peg1 and peg2 machines, but... i don't understand why there are that big (and strange) differencies between memtest results:

    peg1:

    write: 72 MB/s
    verify: 179 MB/s

    peg2:

    write: 424 MB/s
    verify: 214 MB/s

    why is the writing on the peg1 that slow?
    is it the difference between sdr100 and ddr266?

    bye, MarK.
  • »11.03.07 - 19:27
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  • Order of the Butterfly
    Order of the Butterfly
    Wishmaster
    Posts: 342 from 2003/6/29
    edit

    [ Edited by Wishmaster on 2007/3/11 23:11 ]
    Pegasos PPC
  • »11.03.07 - 21:10
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  • Order of the Butterfly
    Order of the Butterfly
    Wishmaster
    Posts: 342 from 2003/6/29
    It could be, because Articia with SDRAM-100 is slower than the Marvell chip with DDR-RAM.
    Pegasos PPC
  • »11.03.07 - 21:21
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  • MorphOS Developer
    CISC
    Posts: 619 from 2005/8/27
    From: the land with ...
    Quote:

    why is the writing on the peg1 that slow?


    There are 2 reasons, but the main one is that the Articia has a 60x bus that seriously cripples performance (mind you, the 750CXe is limited to 60x bus anyway, which is why you'll see similar performance on a Peg2/G3 .. so you won't really notice until you try to use a G4 (or 750G/FX) with Articia), while the Marvell supports MPX which is used by the G4...


    - CISC
  • »12.03.07 - 04:39
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  • Order of the Butterfly
    Order of the Butterfly
    judas
    Posts: 175 from 2005/1/14
    From: core of universe
    the difference seems to be very very big. But if you compare the feeled performance under MorphOs, the difference is very little.

    Only under linux and MOL I really feel a difference between Peg1 G3 and Peg2-G4.
  • »12.03.07 - 05:49
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  • Priest of the Order of the Butterfly
    Priest of the Order of the Butterfly
    MarK
    Posts: 641 from 2004/1/25
    From: Prague, The Cz...
    okay, thanks for explanation. strange, that the writing is 2.5x slower than read and compare, while on peg 2 it's twice that fast...

    bye, MarK.
  • »12.03.07 - 11:29
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