PCI-e loopback card |
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The PCI-e loopback card is a PCI-e gen 2 capable device designed to test PCI-e slots. It has x1 and x4 PCI-e edge connectors for testing x1 and x4 PCI-e host slots up to PCI-e gen 2 speeds. The x1 link connector (top of the diagram below) is designed to test x1 PCIe gen2 capable slots, but may also be used in larger PCIe slots. The x4 link connector (bottom of the diagram below) is designed to test x4 to x16 PCIe gen2 capable slots.
The card also includes a PSU connector to enable the monitoring of the PSU (Power Supply Unit). Please note that the PSU connector is not required to power the PCI-e loopback card and is only used to monitor PSU voltages.
A PCIe loopback card can be inserted in each PCIe slot.
On powering the system, a "Loopback" device category will be displayed in device manager and the PassMark PCIe loopback card device driver will need to be installed. This is available from the PassMark Software website.
The PassMark PCIe loopback card provides the following quick LED indications: Front of card: Five 12V PCIe green voltage LEDs. One 12V red failure LED. Three 3.3V PCIe green voltage LEDs. One 3.3V red failure LED. Two PSU green voltage LEDs and two red failure LEDs. When connected to a working PCIe slot with the PSU connector attached, the green LEDs should be lit, and the red LEDs not lit. Back of card: One TX (transmit) green LED. One RX (receive) orange LED. These should be lit during testing. One red I/O error. Should not be lit when the PCIe slot is operating correctly. One Sleep LED. One Gen2/3 LED. Three test mode LEDs: Loop, Bench and Voltage. The current test mode: loopback, benchmarking or reading voltages will determine which LED is lit.
Loopback and Benchmark modes
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