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pcie-x4 card is not detected in pcie-x16 slot by WinXP SP3 OS.

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http://serverfault.com – I have H61M-ITX board with 1 x PCI Express 3.0 x16 slot (blue @ x16 mode) http://www.asrock.com/mb/Intel/H61M-ITX/ I wan to install there PCI Express x 4 card: http://dektec.com/Products/PCIe/DTA-2144/index.asp I made clean Win XP SP3 install + all MB drivers on top. After I inserted pcie x4 card and boot up. Win XP didn't detect the card (though leds on card are blinking periodically) I then tried LAN adapter I have (to check if all is fine with MB). I took this one: TP-Link Gigabit PCI Express Network Adapter TG-3468 same behaviour - system doesn't see it but if i plug eth cable then le (HowTos)