UMC Green CPU (U5)

The UMC Green CPU was a 486 processor family by United Microelectronics Corporation (UMC) and also a copy of the Intel i486 processor.
Intel forbid UMC to sell 486 CPUs in the United States because of patent infringements.

"Green CPU" U5S

The U5S is similar to the Intel i486 SX. It doesn't feature an integrated FPU.

U5S-SUPER33


U5S-SUPER33
Specification Details
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Unlisted models:

 

  • U5S: SUPER25, SUPER40
  • U5D: SUPER25, SUPER33, SUPER40
  • U486DX2

 

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