IEI Technology PCIE-9650, User Manual

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PCIE-9650 PICMG 1.3 CPU Card
Page 15
2.4.3.1 PCIe x16 Bus Overview
The Intel® Q965 northbridge has on 16-lane PCIe port that is intended for an external
PCIe graphics card. The PCIe x16 graphics card is installed on a compatible PICMG 1.3
backplane and interfaced to the northbridge through the two golden fingers shown in
Figure 2-5 . Note that the 16 lanes of the PCIe x16 northbridge bus are connected to two
golden fingers.
Figure 2-5: PCIe x16 Golden Fingers
2.4.3.2 PCIe x16 Expansion Options
The PCIe x16 can be interfaced to either one PCIe x16 graphics card or a single PCIe x1
expansion card on a compatible PICMG 1.3 backplane.
2.4.3.3 PCIe x16 Bus Specifications
The PCIe port is compliant with the PCI Express* Base Specification revision 1.1. The
PCIe x16 port operates at a frequency of 2.5 Gb/s on each lane while employing 8b/10b
encoding; the port supports a maximum theoretical bandwidth of 40 Gb/s in each
direction. Some of the features are listed below.
One, 16-lane PCIe port intended for graphics attach, compatible to the PCI
Express* Base Specification revision 1.1a.
PCI Express frequency of 1.25 GHz resulting in 2.5 Gb/s each direction