Can a RISC processor be used for mining and would it be competitive to ASIC's?

[SpeedDemon13]

Since ASIC's are specific and not upgradable as RISC, software-wise. Why has no one try to make something built on them?

[DeathAndTaxes]

Nothing beats the efficiency of an ASIC.  Nothing else even comes close.

RISC processor is just a type of general purpose micoprocessor and as such it is a jake of all trades and an ace of none.  General purpose processors trade flexibility for performance.  ASICs trade performance for flexibility.