Macintosh LC III Overclocking, 25Mhz to:===>33Mhz

[Crutch]

Wow good tip. I never knew this.

 

[JC8080]

Just in case someone runs across this thread and wonders what the performance increase is, here is a Speedometer 3.06 benchmark of the same machine 25mhz vs 33mhz. 20mb RAM, upgraded VRAM, System 7.1. I added a chart below showing the % increase. As expected, the CPU is about 1/3 faster, almost all the other tests have a smaller improvement.

 

[theirongiant]

When the instructions say to "remove" this resistor R14, does that mean to leave the pads empty, or bridge them with a jumper wire?

God, this brings back memories. I remember doing something similar with a Texas Instruments calculator in high school. There was a similar modification you could make to the circuit and it would make the calculator run SO much faster. But also eat through the batteries, lol.

 

[danny.gonzalez.0861@gmai]

When the instructions say to "remove" this resistor R14, does that mean to leave the pads empty, or bridge them with a jumper wire?

God, this brings back memories. I remember doing something similar with a Texas Instruments calculator in high school. There was a similar modification you could make to the circuit and it would make the calculator run SO much faster. But also eat through the batteries, lol.

I don't have a LC III but I just overclocked my Performa 630CD and you remove the resistors and replace then in a new location leaving the old pads clear. no need to jumper the old pads.

I red the direction on Low End Mac and the procedure is as follows:

1. Remove the resistor in position R14 (0 ohm). It is located at the top of the motherboard, near the RAM slot.
2. Install the resistor you just removed into position R74.

No indication of needing to do anything after removing the resistor from R14, leave the pads as is.

Hope this helps!