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Intel "Prescott" (90nm, Socket 478) CPU Compatibility
 
12.1 intel 845, 845E, 845G/GE/GL/GV, 848P, 865G/P/PE chipsets  
The intel "Prescott" CPUs are new CPU type made from the newer 90nm fabrication technology. "Prescott" CPUs comes in packages of 478-pins mPGA and LGA775, Pentium 4 or Celeron types, with 533MHz or 800MHz Front-Side-Bus. "Prescott" CPUs started to appear somewhere in 2004, whereas the 845xx, 865xx chipset (Socket 478) motherboards had a much longer history of shipment since 2001. The older designed Socket 478 motherboards may not compatible with the "Prescott" CPUs due to hardware limitations.

Here is a brief summary of the intel 845xx, 848P, 865xx chipset motherboards :

845 / 845E chipset motherboards - not compatible with "Prescott" CPUs

845 G/GE/GL/GV - in general not compatible with "Prescott" CPUs, except on the later PCB version of model -

  • 845xxMS4-A34 (PCB Revision -02, -10)

848P - compatible with "Prescott" CPUs, after upgrade to newer BIOS

865 G/PE/P - compatible with "Prescott" CPUs, after upgrade to newer BIOS

Refer to the BIOS / Manual Download Area for latest production BIOS.

 

 
12.2 VIA P4x266/266A/266E, P4m266/266A, P4x533, PT800 chipsets
Similar to the situition listed above for the intel 845/848/865 family, the VIA P4x266/266A/266E and P4m266/266A chipset (Socket 478) motherboards had a rather long history of shipment, which is before the launch of "Prescott" CPUs in 2004.

Below is a summary of these VIA chipsets motherboard products with respect to the "Prescott" CPUs :

P4x266 / 266A / 266E - not compatible with "Prescott" CPUs

P4m266 / 266A - in general not compatible with "Prescott" CPUs, except on the later PCB version of model -

  • P4m266AMS4-A31 (PCB Revision -10)

P4x533 - compatible with "Prescott" CPUs, after upgrade to newer BIOS

PT800 - compatible with "Prescott" CPUs, after upgrade to newer BIOS

Refer to the BIOS / Manual Download Area for latest production BIOS.