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PB430/440/440T Processor Upgrade

Warning Only authorized service personnel should upgrade the system. Anyone who wants to upgrade the system herself/himself should know about the dangers of ESD (Electro-Static Discharge) and the necessary precautions. Unknowingly zapping the components of the computer will void the warranty.
 
   

Component Locations

The upgrade processor installs in the Zero Insertion Force (ZIF) socket at location U48.
 

Upgrade Table

 

Note

This motherboard will accommodate the P24T processor.  
 
The BIOS must be updated to ID 21.
 
The interposer is not required. This motherboard will not support 3.3V processors. Intel refers to the P24T as the Pentium OverDrive Processor or PODP5V. 
 
Any of the processors listed in the table below will work in the PB430/440/440T system. Set the jumpers accordingly
 

Jumpers

J23

J25

J26

J40

J40

J40

J34

J34

J34

Pins

1-2

1-2

1-2

1-2

3-4

5-6

1-2

3-4

5-6

486SX20

In Out Out Out In Out Out Out In

486SX25

Out In In Out In Out Out Out In

486SX33

Out In Out Out In Out Out Out In

486SX/2-50
486DX-25
486DX/2-50
DX2ODPR50
DX4ODPR75
P24T - 62 Mhz

 Out In In In Out In In Out In

486DX-33
486DX/2-66
DX2ODPR66
DX4ODPR100
P24T - 83 Mhz

 Out In Out In Out In In Out In

80487SX -25
DX2ODP50
DX4ODP75

 Out In In In Out In Out In Out

80487 SX-33
DX2ODP66
DX4ODP-100
*DX4ODP-120

 Out In Out In Out In Out In Out
 

Note
*The DX4-120 CPU requires a 486 system to be able to run at 40 MHz clock speed. None of our motherboards have been qualified to run at that speed. However, they will run at 33 MHz which will yield 100 MHz DX4 speed.
 
CPU Installation
CPU Removal
 

Purchase Referrals
End users should contact Intel at (800) 538-3373 for a referral to a dealer who handles Intel products.