Hi,

the one I salvaged has 900 MHz and 128 SyncDRAM
Your best bet for improved performance is to increase your RAM, and save your money for a new machine

You do not say what operating system you are using, or if you have onboard video or a card, or what speed your HDD is running at.

I do quite a lot of upgrading and salvaging, so I am very conscious of "bang per buck" considerations

Give me a few more details of what you have got and I will try to suggest what I think is worthwhile.

Cheers