Overclocking Pegasos 1, G3
  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 265 from 2019/5/9
    From: Central Bohemi...
    Hello,
    please, can somebody advice me how overclock Pegasos 1 with G3 (750CXe) ?

    I found here few topics about G3 overclocking, but they are old, links are not works and original authors are not logged here for several years:
    FS: Pegasos I G3@700 MorphOS Keyfile 768MB April2 complete
    Overclocking the 750CXe (G3) CPU boards
    Overclocking your G4

    It will be great, if somebody have schemes or other stuff.
    Many thanks!
    AmigaOS: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep-flex, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »04.10.21 - 07:38
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  • Priest of the Order of the Butterfly
    Priest of the Order of the Butterfly
    Amigaharry2
    Posts: 982 from 2010/1/6
    From: EU-Austria (Wien)
    Ask user DJBASE! Hie did it für a PEG2-G4. Maybe he nows it also for G3.

    For G4 only a new bridge has to be soldered on CPU-Board (see pic below). Don't know on G3.

    42182379ab.jpg
    Peg2, 3xPowerMac G5, 2xPowerbookG4, 2x MacMiniG4, Efika (again), A3000T and life is never boring.....
  • »04.10.21 - 08:48
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 265 from 2019/5/9
    From: Central Bohemi...
    Thank you! I will contact him.

    But regarding the picture I am afraid, that G3 and G4 CPU cards are different.
    As I know, CPU cards are the same for Pegasos 1 and Pegasos 2, only difference is in FSB frequencies ( Peg1 100MHz, Peg2 133MHz) so if there will be scheme for Peg 2 G3 multiplicator, it will be great.
    AmigaOS: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep-flex, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »04.10.21 - 09:12
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  • Priest of the Order of the Butterfly
    Priest of the Order of the Butterfly
    KennyR
    Posts: 799 from 2003/3/4
    From: #AmigaZeux, Gu...
    Historically it was never done much, both because the G3 CPU overlocked is still pretty poor, but because the April chip is a major performance brake that'll undermine anything you do anyway - and that's if it doesn't screw up timing and cause Articia lockups.

    Probably best not to bother.
  • »14.10.21 - 17:21
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 265 from 2019/5/9
    From: Central Bohemi...
    Finally, I got scheme of PLL of Pegasos 1 G3 CPU card. I tried overclocking.
    Technically it is fine, unfortunatelly with higher multiplicator settings (x6.5, x7.0) Open firmware sets FSB frequency to 66MHz (was 100MHz). So, no speed increase is possible with April 1 fix. Theoretically April 2 can do better, but I have no one.

    I have one question regarding USB2.0 card:
    I tested two VIA and NEC USB2.0 cards, they works with Pegasos2 and Sam440ep-flex OOTB.
    But inside Pegasos 1 April 1 NEC never works, and VIA behaves randomly:
    VIA either don't work: (with this message in USB stack log)
    Code:
    6:11 pm| 0-hub.class: Detected device 'USB 2.0 Hub [MTT]' at port 4. I like it.
    6:11 pm| 0-hub.class: Hub has added 1 device(s). That'll be fun!
    6:11 pm| 0-hub.class: Hub with 4 ports successfully configured.
    6:11 pm| 0-hub.class: I'm in love with hub 'USB 2.0 Hub [MTT]'.
    6:11 pm| 0-hub.class: Oh no! I've been shot! Arrggghh...
    6:11 pm| 0-hub.class: My death killed device 'USB 2.0 Hub [MTT]' at port 4!
    6:11 pm| 0-hub.class: Oh no! I've been shot! Arrggghh...
    6:11 pm| 0-hub.class: Time to get rid of 'USB 2.0 Hub [MTT]'!
    6:11 pm| 0-hub.class: Time to get rid of 'PCI Root Hub Unit 1'!
    6:11 pm| 0-poseidon.library: Removed hardware pciusb.device/1. Bye bye!


    or VIA works poorly: USB2.0 is fine, but graphics speed is very reduced: Copy-to-VRAM speed is reduced from 81MB/s to 26MB/s!

    Interesting is, that both above cases occured with the same PCI+AGP cards configuration.
    Is here somebody with Pegasos 1? Can you tell me your experinces with USB cards please?



    [ Edited by sailor 19.02.2022 - 12:55 ]
    AmigaOS: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep-flex, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »19.02.22 - 12:53
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  • Priest of the Order of the Butterfly
    Priest of the Order of the Butterfly
    Amigaharry2
    Posts: 982 from 2010/1/6
    From: EU-Austria (Wien)
    Just look here: http://www.amiga-news.de/de/news/AN-2022-02-00069-DE.html
    Need to translate it!
    Peg2, 3xPowerMac G5, 2xPowerbookG4, 2x MacMiniG4, Efika (again), A3000T and life is never boring.....
  • »20.02.22 - 19:01
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 265 from 2019/5/9
    From: Central Bohemi...
    Yes, it is all the story with my Peg1. Some questions is still unanswered ;-)
    AmigaOS: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep-flex, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »20.02.22 - 19:41
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  • Butterfly
    Butterfly
    Primax
    Posts: 74 from 2021/7/2
    @NewSense

    No need to "garble" our news item, there is always an English-language version ;)

    https://www.amiga-news.de/en/news/AN-2022-02-00069-EN.html

    Of course we also wrote an article about sailor's great comparision of graphic cards for Sam440ep-flex (linked in the news), but there I was reproved: I should not offer automatic translation because everybody wants to use his favourite translator...
    AmigaOne X5000 @ 2GHz / 4GB RAM / Radeon X1650 / AmigaOS 4.1 Final Edition / MorphOS 3.17
    Amiga1200 / Blizzard 1230 IV / 128 MB RAM / AmigaOS 3.9
  • »21.02.22 - 14:50
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  • Priest of the Order of the Butterfly
    Priest of the Order of the Butterfly
    Amigaharry2
    Posts: 982 from 2010/1/6
    From: EU-Austria (Wien)
    Quote:

    sailor schrieb:
    Yes, it is all the story with my Peg1. Some questions is still unanswered ;-)


    Ohh - did'nt recognize (moebius loop :-) )
    Peg2, 3xPowerMac G5, 2xPowerbookG4, 2x MacMiniG4, Efika (again), A3000T and life is never boring.....
  • »21.02.22 - 16:34
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  • Butterfly
    Butterfly
    Goodman
    Posts: 79 from 2006/8/2
    Quote:

    sailor wrote:
    Finally, I got scheme of PLL of Pegasos 1 G3 CPU card. I tried overclocking.
    Technically it is fine, unfortunatelly with higher multiplicator settings (x6.5, x7.0) Open firmware sets FSB frequency to 66MHz (was 100MHz). So, no speed increase is possible with April 1 fix. Theoretically April 2 can do better, but I have no one.

    or VIA works poorly: USB2.0 is fine, but graphics speed is very reduced: Copy-to-VRAM speed is reduced from 81MB/s to 26MB/s!

    Interesting is, that both above cases occured with the same PCI+AGP cards configuration.
    Is here somebody with Pegasos 1? Can you tell me your experinces with USB cards please?




    Here my brief experience with April2:

    Time ago I had a VIA it worked ramdonly, ALi and NEC don't work at all.
    Be careful with graphics cards which are listed as "compatible".
  • »03.03.22 - 19:22
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 265 from 2019/5/9
    From: Central Bohemi...
    Thanks,
    it looks that ArticiaS with April 2 have the same or very similar issues.

    Oh, April is not May, and May is not Marwell ;-))
    AmigaOS: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep-flex, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »04.03.22 - 07:07
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 265 from 2019/5/9
    From: Central Bohemi...
    @jPV
    That's nice!
    At least some combinations gfx+USB works.
    AmigaOS: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep-flex, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »04.03.22 - 18:47
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