Evergreen Technologies 586 133 Mhz Socket 3 Overdrive CPU

This CPU is an Evergreen Technologies 586 133 Mhz Socket 3 Overdrive CPU and was pulled from a working system.

It is a very rare "Overdrive" CPU for old Socket 3 mainboard which only have 5 volt CPU support. 

Internally it uses the AMD 5x86 133 Mhz in combination with voltage regulation to be able to use it on older 5V socket 3 boards. You can of course use it on any "modern" socket 3 board with 3.3 volts as well. Just configure it like an AMD 5x86 133 Mhz.


It was tested on a Socket 3 mainboard and is working fine.

This Evergreen Technologies 586 133 Mhz CPU is as fast as the AMD 5x86 133 Mhz or about as fast as a Pentium 90 and is the optimal choice if you want to build a DOS retro system, e.g. to play Monkey Island(tm) and want to use your favourite socket 3 mainboard.



Under the picture you can find the specs of this CPU.



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General information
TypeCPU / Microprocessor
FamilyAMD 80486
CPU part number
  • Evergreen Technologies (Am486DX5-133V16BHC)
Frequency133 MHz
Bus speed33 MHz
Clock multiplier4
Package208-pin Shrink Quad Flat Pack
SocketSQFP208
Size1.1" x 1.1" / 2.8cm x 2.8cm
Architecture / Microarchitecture
Instruction setx86
Manufacturing process0.35 micron CMOS
Data width32 bit
Floating Point UnitIntegrated
Level 1 cache size16 KB cache
Physical memory4 GB
Virtual memory64 TB
Low power features
  • Auto Halt power-down state
  • Stop Grant state
  • Stop Clock state
On-chip peripheralsMemory management unit
Electrical / Thermal parameters
Min/Recommended/Max V core3.15V / 3.3V / 3.6V
Minimum/Maximum operating temperature0°C - 85°C
Maximum power dissipation3.35 Watt
Notes on Evergreen 133 MHz
  • The CPU comes with active power regulation which allows the use of this CPU on older 5V only boards. It can be used with 3.3V as well.