Hub Interface Routing Guidelines - Four-Layer Motherboard; Figure 86. Example Hub Interface Breakout / 1.8 V Mch Fingers - Intel Pentium 4 Design Manual

R
8.3 Hub Interface Routing Guidelines - Four-Layer
Motherboard
To optimize the MCH 1.8V core and RAC power delivery, the hub interface should be routed on
the top layer. The 1.8V power pins within the hub interface pin field should have VIAs to the 1.8V
power plane on layer 2 and 4 as well as attach to the high reference decoupling capacitors. See the
below graphic for more details.

Figure 86. Example Hub Interface Breakout / 1.8 V MCH Fingers

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Intel Pentium 4 Processor / Intel
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850 Chipset Family Platform Design Guide
Hub Interface Routing
MCH Top
Layer
131