The Compaq Evo D510's motherboard has a Socket 478 processor socket, and uses an Intel 845G motherboard chipset.
This is information on the Socket 478 processor socket,
http://en.wikipedia.org/wiki/Socket_478As you can see the processor socket has the holes, while the processor has the pins.
478 socket holes.
Only Intel processors that fit into a Socket 478 processor socket, can be used.
Intel Celeron or Pentium 4.
Motherboard Chipset:
The motherboard chipset consists of the Northbridge chip, and the Southbridge chip.
Chip and Chipset are slang terms for I.C.
Integrated Circuit.
The Northbridge chip handles the high-speed processes, while the Southbridge handles the low speed processes of a computer.
The Northbridge handles the Processor, Ram Memory, and any high speed graphics.
(AGP and PCI Express being high-speed graphics.
Any graphics adapter card inserted into a PCI slot, or Integrated Graphics {On-Board), is a slow speed process. Handled by the Southbridge chip)
http://en.wikipedia.org/wiki/File:Motherboard_diagram.svg[CPU stands for Central Processing Unit, or for short - Processor)
This is information about the Intel 845G chipset,
http://en.wikipedia.org/wiki/List_of_Intel_chipsets#Pentium_4_ChipsetsScroll down on the left until you come to -
845G
Read across.
The Nothrbridge chip is the Intel 82845G.
The Southbridge chip is the Intel ICH4.
As you can read looking across, and at the top of the chart, the 845G will support processors with;
1) Celeron, Celeron D, and Pentium 4 processors.
2) Up to a 533MHz FSB. (533MegaHertz Front Side Bus)
(Pentium 4 processors are better than Celeron.
The Celeron was designed as a budget processor.
'Celey's' generally have half of the L2 cache, that a comparable Pentium 4 has)
I felt listing this information in this manner, would help you can make an informed decision, as to what processors are compatible with the Evo D510 motherboard, instead of just stating, "Get this processor".
I will include a link of a website I found some time ago, that sells Pentium 4's with these parameters, at a very reasonable cost.
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