X87
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x87 is a floating-point-related subset of the x86 architecture instruction set. It originated as an extension of the 8086 instruction set in the form of optional floating-point coprocessors that work
16 MHz version of the Intel 80C187
Intel 80287 die shot
Intel 80287XLT
Intel 80387 CPU die image
I386
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The Intel 386, originally released as the 80386 and later renamed i386, is the first 32-bit processor in the line, marking it a significant evolution in the x86 microarchitecture. It is the third-gene
X87
…the CPU. Both 80287XL and 80287XLT offered 50% better performance, 83% less power consumption, and additional instructions. The 80287 works with the 80386 microprocessor and was initially the only coprocessor available for the 80386 until the introduction of the 80387 in 1987. The 80387 is strongly preferred…
An Intel i386DX 16 MHz processor in a ceramic package
Intel A80386DX-20 CPU die image
A Compaq Deskpro 386 with monitor and peripherals; the Deskpro 386 was the first personal computer to feature an 80386 microprocessor.
Intel i386 packaged by IBM