I have been using Volcano II (2) w/ ASUS a7a266 and MSI K7 Turbo:
1) Running Tbirb 1Ghz, 1.2 GHz, 1.3 GHz , It's hotter than nornal (40+) but it still performed OK. However when 1.4 GHz was used overheating occurred (mother board had high pitched sound and one red light lid).
2) I have not tried...