The Mario Chip could only run at 10.5mhz
Now both the Super FX 1 & 2 chip are really the same chip except the FX 2 chip offered more SRAM.
Here are the Specifications, (chip with board)
Super FX Chip (16-bit)
Clock Rate: 21MHz (w/ divider 10.5MHz)
Number of contacts on board: 100 pin
Rom: 1MB
SRAM: 32 KB
Super FX Chip 2 (16-bit)
Clock Rate: 21 MHz
Number of contacts on board: 112 pins
SRAM: 64KB to 128 KB
HERE are links to learn more about the chip, an interview with one of the men who worked on the chip and a commerical.
http://www.anthrofox.org/starfox/...