After spending almost two hours getting Windows XP installed and learning how to save the bios, edit and flash it, I am back in Xubuntu.
I currently have the CPU core set at 850MHz and getting 340Mh/s.
Temperature is climbing slowly, now at 71C. I am going to set fan speed to %50 and see if the temp falls.
After 5 minutes, temp has fallen to 60C, and I am still getting 340Mh/s. Going to try upping the GPU another 20 MHz.
The 20Mhz increase (870Mhz now) gained an extra 8Mh/s, now at 348Mh/s, temp is holding at 60C.
Now I am running at 900Mhz, running 360Mh/s, temp is moving up to 62C.
Tried running at 925Mhz and the system froze. So it looks like I found the upper limit. Before it froze, it was doing 370Mh/s.