The kit includes three generations of Intel x86 microprocessors
from 80386 SL to Pentium. The 80386 and three 80486 processors in the kit
don't have bottom lids so it's possible to see microprocessor dies. Pentium
family in the kit is represented by production version of Pentium 60.
Pictures of individual processors
The only processor from 80386 family in the kit is 80386SL. It's a mobile
microprocessor with 80386 core and power-saving features that are not present
in desktop 80386. This CPU has unusual for x86 microprocessors package -
land grid array (LGA). Interesting that 80386SL had more than 800,000
transistors - three times as many as in a desktop 80386SX/DX processor.
The first processor from 80486 family is 80486SX. The chip has Intel 486 logo on the
front, but doesn't have part number and other markings. The kit claims that
the SX processor has 800,000 transistors. This contradicts to other Intel
sources. According to them SX processors had about 1.2 million transistors
for 1 micron chips, and 0.9 million transistors for 0.8 micron chips.
The second 80486 processor is DX version of the CPU. The difference of DX
processors from SX is that the DX chips have integrated Floating Point Unit.
This CPU doesn't have logo
or part number, FPO number or any other markings except handwriting.
Die of this chip has the same size as SX die - approximately 16mm x 10mm,
i.e. 160 mm2. Left side of the die layout on the picture does
look different from SX die - this is probably where FPU is located.
The last 80486 CPU in the kit is a 80486DX2. Front side of the chip doesn't
have Intel logo or any other production markings, only handwriting. This CPU
has significantly smaller die size - about 84mm2 (7mm x 12mm),
or twice as small as the die of 80486DX chip.
Pentium microprocessor included in the kit is a Pentium 60. This microprocessor
is an early production version with FDIV bug.