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.
This AMD version has a lowspeed standby mode not found on most Intel chips.