This is the download page for HMM, (Hardware Maintenance Manual), for the IBM IntelliStation M Pro 6219,http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-45692
Under the heading > File link, click on > 71p9918.pdf, in blue
[ After you click you won't see anything happening. The PDF file is downloading in the background.
I have Adobe Reader 9.3.4. version, and a medium speed DSL connection. Took 122 seconds before the first page popped up, and the file was fully downloaded also. Longest time it has taken for a PDF file download, in 5 years of downloading. Just wanted to give you a 'Heads Up' ]
In the Bookmarks menu to the left, click on the + sign next to > General Information
Now click on the sub-heading > Features and Specifications
Connectors: four dual inline memory module (DIMM) connectors
The Minimum Amount of ram memory that can be used is 256MB.
The Maximum Amount of ram memory that can be used is 4GB. (4096MB)
The TYPE is PC2100. That is DDR Sdram at 266MegaHertz. (266MHz)
Crucial CT12864AA800 is DDR2 Sdram at 800MHz!
Now WHAT is going on here?
DDR Sdram has 184 gold plated contact pins on the bottom. 92 on EACH side. There is one Locating Notch on the bottom.
DDR2 Sdram has 240 gold plated contact pins on the bottom. 120 on EACH side. There is one Locating Notch on the bottom.
Supporting data is 1) the Hardware Maintenance Manual I just gave you a link to.
This is information about the Crucial CT12864AA800 ram memory module,http://www.crucial.com/store/partspecs.aspx?IMODULE=CT12864AA800
The contact pins on the bottom of a ram memory module are for Voltage, Signal, Ground, and a host of other attributes.
The orientation of the contact pins in regard to the above mentioned attributes, are in a different place, when comparing DDR Sdram to DDR2 Sdram.
Hence the added number of contact pins in a DDR2 Sdram ram memory module.
More than likely the ram memory module is fried. Can't say about the motherboard, in regard to the ram memory slot, or the Northbridge chip.
[Northbridge and Southbridge chip are the motherboard chipset. The Northbridge chip for the IBM IntelliStation M Pro 6219 is an Intel E7205, the Southbridge chip is an Intel 82801DB,http://www.intel.com/products/workstation/chipsets/e7205/e7205-overview.htm
Similar to the Intel 875P, (82875P),http://en.wikipedia.org/wiki/List_of_intel_chipsets#Pentium_4_Chipsets
Who recommended this ram memory module? Crucial?