For Further Research
Intel's official web page for the 925X Express chipset is located at http://developer.intel.com/design/chipsets/925X/index.htm
Intel® 925X Express Chipset Memory Controller Hub (MCH) white paper is available from ftp://download.intel.com/design/chipsets/applnots/30234302.pdf (requires free Adobe Reader available from http://www.adobe.com)
Intel's official web page for the 915P Express chipset is located at http://developer.intel.com/design/chipsets/915P/index.htm
Intel's official web page for the 915G Express chipset is located at http://developer.intel.com/design/chipsets/915G/index.htm
With the high-speed interfaces built into the ICH6 family of I/O controller hubs, cooling is a critical issue. See the thermal design guide at http://developer.intel.com/design/chipsets/designex/302362.htm for details.
For a more complete comparison of chipset features, see the Intel Chipsets Comparison Chart at http://developer.intel.com/design/chipsets/linecard.htm
AnandTech's early 925X versus 915P benchmarks show little performance difference with identical processors. See http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2088&p=1 for details.
Tom's Hardware's coverage of Socket 775 provides detailed coverage of these chipsets. See http://www6.tomshardware.com/motherboard/20040619/index.html for details. More recent benchmarks are available at http://www6.tomshardware.com/motherboard/20040810/index.html.
Extreme Tech analyzes the 9xx-series chipsets at http://www.extremetech.com/article2/0,1558,1614802,00.asp.
Sharky Extreme's review of the 915G and 925X chipsets is noteworthy for discussing the new power connectors used by Intel motherboards. Read it at http://www.sharkyextreme.com/hardware/motherboards/article.php/10703_3379011__1.