. The third generation of x86 family, the Intel 80386 (i386) was a complete 32-bit processor with ability to address 4 GB of physical memory. The processor included new protected mode, that allowed the processor to fully utilize new 32-bit architecture and new features, like memory protection, paging, etc. Another new mode - virtual mode - could be used to run old 8086 applications without switching the processor back from protected mode to real mode. There were a few variations of the Intel 80386:
This AMD version also has low power features. There are several of these in the museum with slight differences in package and markings. This one also happens to be on a PGA adapter.