5x86 / 5k86
Story
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The AMD 5x86 was a processor compatible with the PGA168 socket used by the 80486.
It was the processor that continued the 486 DX4 saga and was actually also sold under the name DX5.
The 5x86 had a 16KB L1 cache, while the competition had only 8KB.
The bus multiplier was really X4, but the motherboard was configured with a multiplier X2 and the processor internally had another multiplier X2, the sum of everything gave us a multiplier X4.
The P75 denomination of which we see here referred to that according to the manufacturer, its performance could be compared with a Pentium at 75MHz and it seems that this manufacturer did not have at that time any processor comparable to Intel's Pentium, so this was a strategy to pass an 80486 overloaded with cache memory as if it were an equivalent to the Pentium.
The experiment did not last long, since soon the K5 and the K6 appeared, which really could be compared to a Pentium.
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5x86
AMD Am5x86-P75
TYPE: AMD-X5-133ADW
Speed: 133 MHz
Bus: 33 MHz
Clock: X4
Cache: 16 KB
Coprocessor: YES
Package: CPGA
Socket: PGA168
Voltage: 3.45 V
Manufacture: 9/1995
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5k86
AMD Am5k86-P75
TYPE: AMD-SSA / 5-75ABR
Speed: 75 MHz
Bus: 50 MHz
Clock: X1.5
Cache: 16 KB + 8 KB
Transistors: 4,300,000
Package: CPGA296
Socket: 5
Voltage: 3.5 V
Manufacturing: 3/1996
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