Intel Socket 478 Platform

Dealing with an Intel socket will not be an easy task. There will also be dangers associated with the stability of the PC and when the modifications are made. This could also severely affect your hardware. Individuals wishing to make modifications to their Intel socket will be doing so at their own risk. If the person has got a good cooling system with the hardware, this would reduce the risk presented to the user. There are many options in BIOS which can be changed accordingly. A good PC configuration can help the individual to make a safe alteration in BIOS.

Getting started

The modifications described below are dangerous for your hardware and stability of your system. Proceed to at own risk.
Better have a good cooling system (get rid of the default fan block/radiator that comes with the processor and buy the right stuff).


The options most frequently changed in the BIOS are:

  • CPU Ext.Clock (FSB)= the external bus frequency of the processor
  • DRAM Clock(FSB)= the RAM bus frequency
  • Clock CPU (or CPU Operating Speed) = CPU frequency
  • DRAM ratio = ratio between CPU and RAM
  • FSB DRAM = frequency of DRAM memory
  • Multiplier Factor = multiplier coefficient
  • CPU Vcore = processor voltage
  • DRAM Vcore = RAM voltage

(information based upon the model of motherboard used).

Getting through

  • System configuration: Intel Pentium 4A at 2.4 GHz socket 478:
  • This processor uses a 100 MHz FSB and a multiplier coefficient of 24 by default.
  • To increase it to 3.2 GHz(3192 MHz):
  • Replace the RAM (DDR PC1600 at 100 MHz) by a strip of PC2100 DDR RAM at 133 MHz.
  • In the BIOS, modifiy:

CPU Ext.Clock (and DRAM Clock depending motherboards) to 133 MHz


Don't forget to settle AGP/PCI RATIO to (66 MHz/33 MHz) no further.

If you do not have an AGP/PCI RATIO Locked option, remove all these modifcations and stick to the default setting.

Modifying the AGP/PCI RATIO Unlocked option, may damage the AGP graphics card or PCI port or PCI card.

Further Modifications

The frequency of your processor can be slightly increased. However these changes are for experts.

====Material needed===

  • Powerful enough aircooling system (Coolermaster, Vantec, Zalman, etc ...)
  • Graphics (liquid cooling system that can reach below 40 degrees Celsius when processor is at full load).
  • Phase compressor that can reach temperatures up to -100 °C depending on the model and change
  • Xtrem-Cooling( E.g liquid nitrogen (LN2), which can reach 196 °C or reels of mixed helium reaching up to -270 °C.
  • A high end motherboard (ASUS P4C800-E Deluxe, Abit IC7-MAX3, Abit NF7-S, DFI Ultra Infinity, DFI Lan Party)
  • RAM with a high frequency (A-Data Vitesta, Corsair XMS, OCZ).
  • A good casing not too small.
  • A probe to check the temperature and software to operate it.
  • To increase the frequency is used in the BIOS:

- Increase CPU Ext.Clock

- Increase CPU Vcore if your processor cannot handle the increase in frequency

- Increase DRAM Vcore

- Putting DRAM RATIO 1:1


Frequencies must be increased step by step, until the system is stable.

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