I just got a hold of an old Power Macintosh G3. Here are the specs:
Power Mac G3 Minitower
366 MHz PPC w/ 1 MB backside cache
320 MB RAM(will be moving up to 512MB-640MB)
6 MB VRAM
20 gig hard drive
24X CD-ROM drive
Internal Zip 100 drive (SCSI)
ROM Version $77D.45F1 (rev 3)
Raytheon voltage regulator
Whisper personality card
Operating System 9.2.2-OS X10.2.6
This is what I know about the computer from the person I purchased it from. He says the following.
The G3 processor in this unit is rated at 350 MHz for use in the Blue & White model. In a beige G3 with a stock 66 MHz system bus speed, you must choose to clock the chip at 333 or 366 MHz. The 350 MHz speed isn't available without messing with the system bus speed (far more risky than just overclocking the main processor). This machine seems quite stable at 366 MHz.
I'm not expert here and am aware of the possible side effects to overclocking but want to take the risk. I've tried overclocking the processor to 400Mhz and haven't been able to. I followed the jumper settings from a few different websites and I have had luck with the 300Mhz/66Mhz Bus setting and 375Mhz/83Mhz Bus setting. 333Mhz setting also works. The 400Mhz setting doesn't work.
Can I overclock the 350Mhz rated chip to 400Mhz? If so, do I need a fan? Without a fan will it damage the processor? Which bus speed should I use and what is the difference between the 66, 75, and 83Mhz bus speed? Is anyone willing to share their experience with this overclocking stuff?