Preliminary Information
AMD Athlon™ 64 and AMD Opteron™ Processors
Thermal Design Guide
26633 Rev.
3.03 September
2003
2.2 Socket Description
Figure 1 shows a three-dimensional view of the Socket 754, which is a socket based on surface
mount technology. The pin array is 29x29 on a 1.27 mm pitch with a 9x9 depopulation in the
center. In addition, three pins are removed from the A1 corner of the package, and a single pin is
removed from the other three corners. The electrical and mechanical connection to the
motherboard is made with a small solder ball at each socket contact. This type of connection does
not allow for a large mass, like a heatsink, to be attached to the socket. Therefore, independent
support structures are required for mounting the heatsink.
Figure 1. 754-pin
µ
PGA Socket Used for the AMD Athlon™ 64 Processor
14
AMD Athlon™ 64 and AMD Opteron™ Processors Thermal Requirements Chapter 2