MicroStar International (Inc) Support > 865PE Neo2-P Platinum Edition (MSI MS-6728) Main Support page,http://www.msi.com/product/mb/865PE-Neo2-P-Platinum-Edition.html
Click on Specification
(Overview / Specification / Download / Support / etc)
CPU (Processor) Support;
1) Intel Pentium 4 processors that have;
A) Use a Socket 478 processor socket,http://en.wikipedia.org/wiki/Socket_478
B) Northwood Core, or Prescott Core
C) Front Side Bus (FSB) of 400MegaHertz (400MHz) for Intel Pentium 4 processors that are based on the Northwood Core.
D) FSB support of either 533MHz, or 800MHz, for Intel Pentium 4 processors based on the Prescott Core.
Processors that have an 800MHz FSB can be used, that have UP TO a 3.6GHz frequency rate. ('Speed')
Indication that higher 'speeds' can be supported. (Overclocking?)
Now let's look at Intel Pentium 4 processors, that are based on the Northwood Core, and fit a Socket 478 processor socket,http://en.wikipedia.org/wiki/List_of_Intel_Pentium_4_microprocessors#Northwood_.28130.C2.A0nm.29
(Front Side Bus = FSB
The M/Ts listing means MegaTransfers per Second.
Believed to be a more accurate method of stating the FSB, than MHz.
Mega = 1 Million
Hertz stands for Cycles per Second. Was named after a man with the last name Hertz.
Example; 400MHz = 400 Million Cycles per Second )
Intel Pentium 4 processors based on the Prescott Core, and utilizing the Socket 478 processor socket,http://en.wikipedia.org/wiki/List_of_Intel_Pentium_4_microprocessors#Prescott_.2890.C2.A0nm.29_2
sSpec Number will be on the processor, as well as the Part Number.http://www.cpu-world.com/CPUs/Pentium_4/index.html
Scroll down for photos.
CPU support can be attested to looking at the specs for the motherboard chipset, on your motherboard.
The motherboard chipset is an Intel 865PE chipset.
Intel 82865PE northbridge chip, and an Intel ICH5 southbridge chip.http://en.wikipedia.org/wiki/List_of_Intel_chipsets#Pentium_4_chipsets
Scroll down to 865PE in the left column.
The part number on the Intel ICH5 southbridge chip, is Intel 82801EB,http://en.wikipedia.org/wiki/List_of_Intel_chipsets#Southbridge_8xx_chipsets
The Northbridge chip of the motherboard chipset, handles the Faster capabilities of a computer.
Processor (CPU), Ram Memory, and HIGH-speed graphics.
HIGH-speed graphics is the AGP technology, or PCI Express technology.
Using a graphics card in a PCI slot, or using Integrated Graphics; is NOT high-speed graphics,http://en.wikipedia.org/wiki/File:Motherboard_diagram.svg
The Slower capabilities of a computer are handled by the Southbridge chip.
If this is a question of what CPU is on your motherboard at present, and the motherboard is in a working computer, suggest use the free tiny program CPU-Z from CPUID.com,http://www.cpuid.com/softwares/cpu-z.html
Need to know how to download, install, and use CPU-Z, post back in a Comment.