Author: parsec
Subject: Z77 Extreme4 - No graphics card possible in PCIe2
Posted: 20 Apr 2016 at 1:21pm
A video card should work in the PCIE2 slot, unless something is damaged, more on that later.
You are using an Ivy Bridge processor, so you have PCIe 3.0 support.
To review the UEFI/BIOS configuration; In the North Bridge Configuration screen, Primary Graphics Adapter should be set to PCI Express.
PCIE 2 Link Speed option, set it to Gen 3 if set to Auto by default. If it is set to Gen 3 by default, try Auto.
You can also try setting the IGP Multi-Monitor option to Disabled, even if that is not supposed to matter unless you are using Vista or XP.
When you have the video card in the PCIE2 slot, and the PC fails to start, what code is displayed on the Dr Debug display, on the lower edge of the board, to the right of center?
Damage that could cause this, bent pins in the CPU socket or damage to the PCIE2 slot. You must remove the CPU cooler and CPU to check for bent pins in the socket, a lot of work but no other way to check that.
Damage to the PCIE2 slot itself may be difficult to see. Cleaning the contacts in the slot can fix video card detection problems. Use a flashlight to check the gold contacts within the slot, they should all look the same, and none missing. The PCIE3 x 16 slot is an x8 lane electrical slot, and has fewer contacts in it than the PCIE2 X16 slot, which is an x16 electrical slot.
Connection pins for the PCIE and PCI slots may be sticking out on the underside of the mother board. If any of them are shorted together, or shorted to the mother board tray or a standoff on the tray, that could cause the failure of the PC to start.
Subject: Z77 Extreme4 - No graphics card possible in PCIe2
Posted: 20 Apr 2016 at 1:21pm
A video card should work in the PCIE2 slot, unless something is damaged, more on that later.
You are using an Ivy Bridge processor, so you have PCIe 3.0 support.
To review the UEFI/BIOS configuration; In the North Bridge Configuration screen, Primary Graphics Adapter should be set to PCI Express.
PCIE 2 Link Speed option, set it to Gen 3 if set to Auto by default. If it is set to Gen 3 by default, try Auto.
You can also try setting the IGP Multi-Monitor option to Disabled, even if that is not supposed to matter unless you are using Vista or XP.
When you have the video card in the PCIE2 slot, and the PC fails to start, what code is displayed on the Dr Debug display, on the lower edge of the board, to the right of center?
Damage that could cause this, bent pins in the CPU socket or damage to the PCIE2 slot. You must remove the CPU cooler and CPU to check for bent pins in the socket, a lot of work but no other way to check that.
Damage to the PCIE2 slot itself may be difficult to see. Cleaning the contacts in the slot can fix video card detection problems. Use a flashlight to check the gold contacts within the slot, they should all look the same, and none missing. The PCIE3 x 16 slot is an x8 lane electrical slot, and has fewer contacts in it than the PCIE2 X16 slot, which is an x16 electrical slot.
Connection pins for the PCIE and PCI slots may be sticking out on the underside of the mother board. If any of them are shorted together, or shorted to the mother board tray or a standoff on the tray, that could cause the failure of the PC to start.