VGA not detected in primary PCIe

Hello guys,
I would like to ask for a help.
I have this problem. I bought new motherboad (ASUS ) and graphic card(ASUS ENGTS250). Tha MB has 2 PCIe slots, one x16 and one x4. Wen I plug the VGA card into the primary slot (x16) I get (through LED on MB) indication that the VGA is not detected (fan is running so it has power). Wen I try to plug it in the second PCIe slot (x4), then it works fine. I don't know where's the problem. The card is PCIe x16 so it should work in the primary slot.
Thanks in advance for any advice.
5 answers Last reply
More about detected primary pcie
  1. I forgot, here is teh mother board name: ASUS P7P55D (90-MIB960-G0EAY00Z)
  2. It sounds like the primary slot is faulty.
  3. Is there any option how to test if the slot is really damaged?
  4. Well,
    suppose that the primary PCIe slot is faulty. I would like to know if I loose any graphic performance using the second slot. The problem is that I am not sure if it is x4 or x16 because this is the manufacturer description of extension slots on the MB:

    1 x PCIe 2.0 x16 (single at x16)
    1 x PCI Express 2.0 x16 slots (@x4 mode, 2.5GT/s)

    Is the second slot x16 or x4, what does "@x4 mode, 2.5GT/s" stand for?
    Thanks in advance.
  5. It is at x4 the 2.5GT/s is the transfer speed. The only thing you can do with the slot is to take a look inside it and see if there are bent or missing pins. RMA of the board would be in order though.
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