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[FdB]

Added a pair of Evercool 50x50x15 - 4500 RPM fans
and with help from E.M. and C.A @OWC… the SW3 switch
(under heatsink) sets the core voltage of the CPU and is
not to be set using the same switch settings as those
provided in the chart (from manual - like SW1 and SW2)
for the dual processor version. Okay for SW1 (and SW2
when present)... but not SW3.

Considering the age of this processor upgrade and its’
unknown history or long-term exposure to heat… gradual
speed testing stability & performance from slow-to-faster
settings has been strongly advised.

1.4GHz
SW3:  1 UP, the rest down
SW1:  2, 3, 4 UP, the rest down

1.53GHz
SW3: 2 and 3 UP, the rest off
SW1: 1, 2, 3, 4, 5 UP, and 6 down

1.6GHz
SW3: 1, 2, 3 UP, the rest down
SW1: 2 UP, the rest down

Intend to eventually attempt the original 1.6GHz settings.
However, that will be with a higher volume, constant-on
CPU fan… instead of the stock Quicksilver CPU fan…
monitoring both performance stabilty and temperatures.

[DieHard]

G4 Extreme !
7455 baby

http://macos9lives.com/smforum/index.php/topic,3882.msg26198.html#msg26198

[FdB]

Of course you’d have a 7455    instead of this lowly
7447A Single Processor unit. Drats! and darn you DieHard!

Biggest hurdle (so far) with this one was actually getting
the necessary SW3 settings (and taking a shot on which
fans to use). I hate having something around that could
possibly work, but needs only a few “bits” to try.

OWC reps have stressed the importance of fans & cooling
with the Quicksilver, as evidently many of these 7447A’s
may have been “cooked” in the Quicksilvers. And sure,
I’d like to eliminate the original Quicksilver CPU fan too
… alas, no.

But yes… a QS with one of the OWC 7445’s for $80.00
is most definitely a triumphant coup!

Vee shall see if 1.6GHz is achieved with this 7447A Single.
If it works, MacBench 3 results shall be posted! So there.

Pink slips? My Ford versus your Mercury?
Balls de-luxe. Gauntlet dropped. Full shred.
Rev it up!

https://www.youtube.com/watch?v=J21JU6jckls
https://www.youtube.com/watch?v=vHY0YxdswyY