Adding RAM to your machine would certainly help.
Fortunately it is easy to add RAM to your machine and it takes standard size RAM. PC133 with 168 pins. It can be easily installed by you.
Check the system profiler, under the Apple Menu, for exact memory configuration.
If you have 256MB right now, you almost certainly have two 128MB sticks in the machine. To increase the RAM you will have to sacrifice one or possibly both existing sticks. The next size RAM stick is 256MB ($57)followed by 512MB ($86). This iMac tops out at 1GB of RAM which will set you back $172 (2 x 512). 512 + 256 ($143) or 512 + 128 ($$86)
The site I used to price this RAM is www.memorytogo.com
Hope this helps
Hey i've got a G3 imac (600 mhz processor, 256 mb ram 40 gb H.d.) and its been running slow lately. i want to speed it up, and i think adding more ram will give it the kick it needs. i think its the ram thats the prob because me and my dad (on separate computers) are running the same os (10.3.x) and he has a 667 mhz processor, so i dont think thats too huge of a gap. he has 768 mb ram i think, and his runs tons faster than mine. Do you think this will speed up my computer? what kind of ram should i get (graphite imac g3)? any info would be greatly appreciated. thanks