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  • Experimental Pentium Overdrive testing with the UCA [calling Dr Jim!]

    From Louis Ohland@21:1/5 to All on Mon May 29 06:39:05 2023
    https://x86.fr/experimental-pentium-overdrive-testing-with-the-uca/

    "And it still works! Current consumption rises to ~1.3A to reach 6.4W. I
    also tried running the Pentium OD at full speed (33.3 MHz FSB for a 83
    MHz final clock) but unfortunately, it only runs for a couple seconds
    before crashing. There is no doubt that the crash come from the missing
    power supply pins, but being able to run it at 63 MHz on the UCA is
    quite impressive! "

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Ryan Alswede@21:1/5 to All on Tue May 30 08:57:08 2023
    Wish someone would build powerleap copies with matching heatsinks...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From IBMMuseum@21:1/5 to All on Wed May 31 15:27:56 2023
    With the fan removed, the PODx3 runs at the supplied FSB speed (25MHz for a POD63, and 33MHz for a POD83) with no clock multiplier. You would think a 3-pin fan connection would be power and a tach signal, but it is an absolute mess of additional
    components. The page refers to the tested CPUID value (1532h), but not the Intel S-specs and steppings:

    S-spec SZ953: POD63, stepping B1, CPUID 1531h
    S-spec SZ990: POD63, stepping B2, CPUID 1531h
    S-spec SU013: POD63, stepping C0, CPUID 1532h
    S-spec SU014: POD83, stepping C0, CPUID 1532h

    Note that the POD63 gives the same CPUID with steppings B1 and B2 - but the Intel datasheet lists S-specs and steppings that were produced for reference.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)