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AMD 5x86
  AMD Am5x86-P75
  AMD Am5x86-P75 X5-133ADW
  AMD Am5x86-P75 X5-133ADZ
  AMD Am5x86-P75 X5-133SFZ
  AMD Am5x86-P75 DX5-133V16BHC
  AMD Am5x86-P75 DX5-133W16BGC
  AMD Am5x86-P75+ X5-150ADW
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The AMD 5x86 Processor
Introduced in November 1995, the AMD 5x86 is a standard 486 processor with an internally-set multiplier of 4, allowing it to run at 133 MHz on systems without official support for clock-multiplied DX2 or DX4 486 processors. Like most of the later 486 parts, the 5x86 featured write-back L1 cache, and unlike all but a few, a generous 16 kilobytes rather than the more common 8KB.
 
Since having a clock multiplier of four was not part of the original Socket 3 design, AMD made the 5x86 look for a two times setting from the motherboard and interpret that as four times instead. In other words, to use the 5x86 you want to set the motherboard to the 2x setting. This will actually cause the 5x86 to run at 4x.
 
The combination of best-in-class clock speed and the write-back cache allowed the 5x86 to equal or slightly surpass an Intel Pentium 75 MHz processor in business application performance. Also, because it was based on a pure 486 design, it was compatible with older systems, something its slightly faster rival, the Cyrix 5x86, had trouble with.
AMD Am5x86-P75
AMD Am5x86-P75 Top Side
Am5x86-P75
DS91467
9721FPB
(m) AMD
MALAYSIA
Win95 Logo
AMD Am5x86-P75 Back Side
Comment by Hopeapaa (hopeapaa[at]hotmail.com):
This little chip didn't have any multiplier-lock so I ran it using the 3x multiplier supported by the motherboard and used the clock-speed of 3x50 = 150 Mhz. With this kind of configuration the chip really stood up the name "P75", since it slightly over-performed the Intel Pentium 75 Mhz. I had this chip in active use until the Pentium 2 and K6 chips hit the 300 Mhz barrier and I upgraded the motherboard and CPU to K6 300 Mhz in the year 1998.
 
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Core Frequency:133 MHz
Board Frequency:33 MHz
Clock Multiplier:4.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Circuit Size:0.35
Voltage:3.45 V
Introduced:09/1995
Manufactured:week 21/1997
Made in:Malaysia
L1 Cache:16 KB
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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AMD Am5x86-P75 X5-133ADW
AMD Am5x86-P75 X5-133ADW Top Side
Am5x86-P75
AMD-X5-133ADW
A 9647FPM
(m) AMD
3.45 VOLT
HEATSINK AND
FAN REQD
MALAYSIA
Win95 Logo
AMD Am5x86-P75 X5-133ADW Back Side
add comment
Core Frequency:133 MHz
Board Frequency:33 MHz
Clock Multiplier:4.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Circuit Size:0.35
Voltage:3.45 V
Introduced:09/1995
Manufactured:week 47/1996
Made in:Malaysia
L1 Cache:16 KB
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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AMD Am5x86-P75 X5-133ADZ
AMD Am5x86-P75 X5-133ADZ Top Side
Am5x86-P75
AMD-X5-133ADZ
A 9606APG
(m) AMD
3.45VOLT
MALAYSIA
Win95 Logo
AMD Am5x86-P75 X5-133ADZ Back Side
Comment by Dirk (www.winhistory.de) (webmaster[at]winhistory.de):
A nice CPU, now runs in my socket 3 PC with 160 MHz (4x40MHz)! Over 340 Points in Norton SI! I love it, although I had to spend some artic silver .... nothing cheaper was in the near... =)
 
add comment
Core Frequency:133 MHz
Board Frequency:33 MHz
Clock Multiplier:4.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Circuit Size:0.35
Voltage:3.45 V
Introduced:09/1995
Manufactured:week 06/1996
Made in:Malaysia
L1 Cache:16 KB
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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AMD Am5x86-P75 X5-133SFZ
AMD Am5x86-P75 X5-133SFZ Top Side
Am5x86-P75
AMD-X5-133SFZ 3.3-VOLT
9703BLB
(m) AMD
Win95 Logo
JAPAN
AMD Am5x86-P75 X5-133SFZ Back Side
add comment
Core Frequency:133 MHz
Board Frequency:33 MHz
Clock Multiplier:4.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Circuit Size:0.35
Voltage:3.3 V
Introduced:09/1995
Manufactured:week 03/1997
Made in:Japan
L1 Cache:16 KB
Package Type:Plastic
PQFP on
PGA-168
Socket: 1/2/3
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AMD Am5x86-P75 DX5-133V16BHC
AMD Am5x86-P75 DX5-133V16BHC Top Side
Am5x86-P75
AM486DX5-133V16BHC
9815FLA
(m) AMD
Win95 Logo
JAPAN
AMD Am5x86-P75 DX5-133V16BHC Back Side
KINGSTON-USA
TC5X86/133-CE
1545-006.B00
1545 REV G
A Kingston "TurboChip" 486 upgrade kit for 486 systems. It has a 133MHz AMD 5x86-P75 PQFP packed CPU mounted on a PGA curcuit board to fit into a standard 486 socket. A fan is mounted on top of the module. These kits were sold as upgrades for common i486 systems and came with an installation booklet and a chip puller.
 
Comment by Netster403 (webmaster[at]stolenbandwidth.net):
This is the same chip burried inside the Mitsibushi Amity VP Pentop computer. It was cooled by a large flexable copper pad. Thats why the sucker ran REALLY hot after a few hours of operation...
 
add comment
Core Frequency:133 MHz
Board Frequency:33 MHz
Clock Multiplier:4.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Circuit Size:0.35
Voltage:3.45 V
Introduced:09/1995
Manufactured:week 15/1998
Made in:Japan
L1 Cache:16 KB
Package Type:Plastic
PQFP on
PGA-168
Socket: 1/2/3
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AMD Am5x86-P75 DX5-133W16BGC
AMD Am5x86-P75 DX5-133W16BGC Top Side
Am5x86-P75
Am486 DX5-133W16BGC
9751BPA
A 9606APG
(m) AMD
MALAYSIA
Win Logo
AMD Am5x86-P75 DX5-133W16BGC Back Side
Donated by Christian Lederer. Thanks a lot!  
Comment by VK (disaja[at]kjsd.coij):
Had one of those! Loved having Pentium-class processing power in a fraction of the pentiums' cost!! :D
 
add comment
Core Frequency:133 MHz
Board Frequency:33 MHz
Clock Multiplier:4.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Circuit Size:0.35
Voltage:3.45 V
Manufactured:week 51/1997
Made in:Malaysia
L1 Cache:16 KB
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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AMD Am5x86-P75+ X5-150ADW
AMD Am5x86-P75+ X5-150ADW Top Side
Am5x86-P75+
AMD-X5-150ADW
A 9617DPA
(m) AMD
3.45 VOLT
HEATSINK AND
FAN REQD
MALAYSIA
Win95 Logo
AMD Am5x86-P75+ X5-150ADW Back Side
Donated by Mark Cassino. Thanks a lot!  
This version is a very rare P75+ and has a different clock multiplier of 3. It was designed for 50 MHz 486 systems and ran at an internal speed of 150 MHz.
 
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Core Frequency:150 MHz
Board Frequency:50 MHz
Clock Multiplier:3.0
Data bus (ext.):32 Bit
Address bus:32 Bit
Circuit Size:0.35
Voltage:3.45 V
Manufactured:week 17/1996
Made in:Malaysia
L1 Cache:16 KB
Package Type:Ceramic
PGA-168
Socket: 1/2/3
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