I had my SE/30 running for only about an hour today (to test my Xceed PDS video card with an external VGA 17" display) and I pulled the motherboard to take some photos of my ROMinator II Mega. My hand touched the top of the CPU and FPU and quite nearly got burned. It's rather surprising these chips don't need to be heat-sinked. They was a huge amount of heat coming off the board. Just holding my hand above the board I could feel the heat flow up. How hot are these chips allowed to get?