[maczan1205]

Hopefully it may be installed on your computer already, check in the preferences < start up disk < and see if there is a Mac OS9 start up disk, if so select it and restart.
If not you will have to find your original disks and install it.

[maczan1205]

Here is a link for info on the G3/300 - for your info.
Power Macintosh G3 / 300

[zarmanto]

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Actually, that's what it says on the back of my computer, but when I look at the specs inside System, it says 320.

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Based upon this, and other things you've noted in this thread, I'd say that the previous owner wasn't shy about upgrading the system. I'm guessing that you probably have this system, which originally shipped with a paltry amount of RAM, that most people upgraded almost immediately. It also shipped with no faster than a 333MHz procesor, and one of your posts indicates that it may have been upgraded to 533MHz. Processor upgrades sometimes require additional software from the upgrade vendor in order to work optimally, by the way -- particularly under MacOS 9. (MacOS X is usually better about recognizing upgrade cards.)
Regarding your Windows box... oddly enough, it sounds like it's actually a little older than the Macintosh -- but it's running the original operating system that came with the hardware, which is why it seems faster. So MacOS 9 is worth a try on the Mac. If it turns out that MacOS 9 isn't already installed and you don't happen to have an installation CD handy, then you'll probably need to get one secondhand, as I'm pretty sure Apple dropped it from their retail channels awhile ago.

[JackMac]

Right sorry when I saw the top info on your system I thought that was taken from the System Profile.

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Actually, that's what it says on the back of my computer, but when I look at the specs inside System, it says 320.

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