I’ve never had F@H bog down even the slowest machine. There may be some other settings to check. I have had a couple of machines that would overheat at 100% of CPU that required some limits.
In general, in setup you can limit the percentage of CPU time or the number of cores to use on a multicore machine.
Its been a while since I did it, maybe others could chime in with more help. If we knew a little about your setup, it would be easier to give precise answers.
CPU: AMD Athlon 64 X2 Dual Core Processor
From FAH’s “System Info” tab
Memory: 2.00 GiB
Free memory: 901.86MiB
Opened programs are quite bogged down until I pause FAH. Then, everything returns to normal.
I forgot:
My video card is NVidia GeForce 9500 GT