Demon's Souls - Required PC Specs?

Thanks for the tip, but still getting 10 to 15 FPS. I think I saw it drop to 3 for a second. Currently using ~92% on all cores and only like 10% or something on the GPU, so it seems like it's not a PC performance issue but something else.

Edit: graphics card use goes up to like 30% max, CPU uses 80-92%