Supermicro Xeon P4X4-028-512K User Manual

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Central Agent - The central agent is the host bridge to the processor and is typically known as 
the chipset. 

Flip Chip Ball Grid Array (FC-BGA) - Microprocessor packaging using “flip chip” design,

where the processor is attached to the substrate face-down for better signal integrity, more
efficient heat removal and lower inductance.

FC-mPGA2 - Packaging technology with the processor die mounted directly to a micro-Pin

Grid Array substrate with an integrated heat spreader (IHS).

Front Side Bus - Front Side Bus (FSB) is the electrical interface that connects the processor to

the chipset. Also referred to as the processor system bus or the system bus.   All memory and

I/O transactions as well as interrupt messages pass between the processor and chipset over the
FSB.

•

Xeon™ processor with 512 KB L2 cache - The entire processor in its INT-mPGA

package, including processor core in its FC-BGA package, integrated heat spreader (IHS), and
interposer.

•

Xeon™ processor with 533 MHz Front Side Bus - The entire processor in its FC-

mPGA2 package, including processor core in its FC-BGA package, integrated heat spreader
(IHS), and interposer.

Integrated Heat Spreader (IHS) - The surface used to attach a heatsink or other thermal

solution to the processor.

•

Interposer - The structure on which the processor core package and I/O pins are mounted.

OEM - Original Equipment Manufacturer.

•

Processor core - The processor’s execution engine. All AC timing and signal integrity
specifications are to the pads of the processor core.

•

Retention mechanism - The support components that are mounted through the baseboard to

the chassis to provide mechanical retention for the processor and heatsink assembly.

•

Symmetric Agent - A symmetric agent is a processor which shares the same I/O subsystem

and memory array, and runs the same operating system as another processor in a system.

Systems using symmetric agents are known as Symmetric Multiprocessing (SMP) systems.
Intel

® 

Xeon™ (DP - Dual Processor) processors should only be used in SMP systems which

have two or fewer symmetric agents. 

The data contained in this document is subject to change. It is the best information that Intel is able

to provide at the publication date of this document.