over clocking survey

Liquid cooling is only relevant if the chip is overvolted. At stock voltage, it is likely to hang (or produce incorrect results) long before it gets hot enough to care about that extra cooling.

If not, then it is way better to use a TEC (Peltier) and run the chip at sub-zero temp - a lower temp makes a chip faster.

The thing to remember with a 8051 chip is that it hasn't any PLL. So can't just reconfigure to try higher and higher speeds. You either need to replace the crystal, or connect a programmable oscillator instead of the crystal.

Liquid cooling is only relevant if the chip is overvolted. At stock voltage, it is likely to hang (or produce incorrect results) long before it gets hot enough to care about that extra cooling.

If not, then it is way better to use a TEC (Peltier) and run the chip at sub-zero temp - a lower temp makes a chip faster.

The thing to remember with a 8051 chip is that it hasn't any PLL. So can't just reconfigure to try higher and higher speeds. You either need to replace the crystal, or connect a programmable oscillator instead of the crystal.