My goal was to take the 250MHz G3 and get 333MHz out of it with 66x5.0
But upon upping the clock to 333MHz , the cpu appeared to lock up due to the accumulated heat in the heatsink.
I am now successfully running the cpu at 300MHz with 66x4.5 and it appears to be running nicely.
Now, it's been running for about 2 hours total, so this isn't final. But this statement is more a proof of concept.

One thing to note is that the FSB is running at 66MHz, thus the memory bus is running at 66MHz and not 83MHz which
is a drop of 17MHz. When running GaugePRO it shows that the 'memory performance' benchmark test it performs is slower
on the slower bus speed. But I have yet to find any noticible performance loss with the slower memory speed.

I have now gotten the 250MHz cpu to run at the following speeds.

3.0 x 66MHz = 200MHz	(successfully ran the 1MB L2 cache at 1:1 200MHz)
3.5 x 66MHz = 233MHz
4.0 x 66MHz = 266MHz
4.5 x 66MHz = 300MHz
5.0 x 66MHz = 333MHz	(boots, but eventually overheats)
3.0 x 83MHz = 250MHz	(stock configuration)
3.5 x 83MHz = 292MHz

The most annoying part of this project is the 0 ohm resistors being so small. For those of you with a
magnifying glass, it will be easier to see if you've made successful solder joints, but for me,
I ended up not using them and bridging the pads together with wire.

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Below is a graphical representation of the various multiplier configurations on the CPU.

3.0x Multiplier. R118, R119, R115, R114 o (R120) o (R118) o   o (R119) o (R117) o   o (R115) o (R113) o   o (R114) o (R112) o

3.5x Multiplier. R118, R117, R113, R114 o (R120) o (R118) o   o (R119) o (R117) o   o (R115) o (R113) o   o (R114) o (R112) o

4.0x Multiplier. R118, R119, R113, R114 o (R120) o (R118) o   o (R119) o (R117) o   o (R115) o (R113) o   o (R114) o (R112) o

4.5x Multiplier. R120, R117, R113, R112 o (R120) o (R118) o   o (R119) o (R117) o   o (R115) o (R113) o   o (R114) o (R112) o

5.0x Multiplier. R119, R118, R113, R112 o (R120) o (R118) o   o (R119) o (R117) o   o (R115) o (R113) o   o (R114) o (R112) o

5.5x Multiplier. R119, R118, R115, R112 o (R120) o (R118) o   o (R119) o (R117) o   o (R115) o (R113) o   o (R114) o (R112) o

6.0x Multiplier. R117, R118, R115, R112 o (R120) o (R118) o   o (R119) o (R117) o   o (R115) o (R113) o   o (R114) o (R112) o

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The memory bus frequency is decided by a Motorola MPC106 Bridge/Memory Controller. The MPC106 is configured by 8-registers R6,R7,R8,R9,R10,R11,R12,R13 on the top side of the CPU card.
	66 MHz FSB o (R6) o (R7) o   o (R8) o (R9) o   o (R10) o (R11) o   o (R12) o (R13) o   83 MHz FSB o (R6) o (R7) o   o (R8) o (R9) o   o (R10) o (R11) o   o (R12) o (R13) o
The bus clock frequency is decided by a Motorola MPC932 Low Voltage PLL Clock Driver. [datasheet] The MPC932 configured by 4-registers R78,R79,R80,R81 on the under side of the CPU card.
	66 MHz FSB o (R77) o (R76) o   o (R79) o (R78) o   o (R81) o (R80) o   o (R85) o (R84) o   83 MHz FSB o (R77) o (R76) o   o (R79) o (R78) o   o (R81) o (R80) o   o (R85) o (R84) o

Subject: Successful overclock 250MHz -> 292MHz

    Sep 22, 2004 (Nils)
    Oct 13, 2004 (Nils)
    Nov 15, 2004 (Nils)


Subject: How to control fan on Wallstreet in OS X ?

    Oct 29, 2004 (Nils)
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