Advice for upgrading Compaq 100B

A friend asked me to help her make her PCs at her business run faster. It turns out they have plenty of RAM but a slow processor that appears to be soldered directly to the motherboard. Since this computer does not have an internal power supply, I presume she will need a new chassis, power supply, motherboard, and CPU (assuming she can re-use her 8G of Crucial 201351 DDR3-1333 RAM per machine). So far, do you agree?

On Friday, September 18, 2015 at 4:00:09 PM UTC-5, Bob Simon wrote:
A friend asked me to help her make her PCs at her business run faster. It turns out they have plenty of RAM but a slow processor that appears to be soldered directly to the motherboard. Since this computer does not have an internal power supply, I presume she will need a new chassis, power supply, motherboard, and CPU (assuming she can re-use her 8G of Crucial 201351 DDR3-1333 RAM per machine). So far, do you agree?

(This posted before I finished composing my message; sorry.)
She runs a small business and must keep costs down so I'm looking for good bargains. I started with the assumption that AMD will give her better bang for the buck than Intel. (Right/Wrong?)

So I found the Phenom 9850 Quad Core for around $50 but it takes a AM2 or AM2+ socket. Were these popular at the time? If so, and if you think she should proceed along these lines, can you recommend an inexpensive motherboard that will take this processor?

Thanks!
Bob