Hiroshige Goto (April 9, 2010). "Sandy Bridge Interface"(PDF). PC Watch website. Archived from the original(PDF) on September 28, 2011. Retrieved November 12, 2011.
intel.com
[1] page 30. From "Intel® Xeon® Processor E5-2400 Product Family Thermal/Mechanical Design Guide" by Intel
Hiroshige Goto (April 9, 2010). "Sandy Bridge Interface"(PDF). PC Watch website. Archived from the original(PDF) on September 28, 2011. Retrieved November 12, 2011.