Z77 Extreme4 - No graphics card possible in PCIe2
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=2486
Printed Date: 18 Jul 2025 at 10:13pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Z77 Extreme4 - No graphics card possible in PCIe2
Posted By: blindhai
Subject: Z77 Extreme4 - No graphics card possible in PCIe2
Date Posted: 20 Apr 2016 at 5:28am
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Z77 Extreme4 - No graphics card possible in PCIe2 (the upper 16x PCIe) Hello, i have a problem: I can't use my graphics card (R280X) in my Z77 Extreme4 Mainboard in the upper PCIe 16x Slot aka PCIe2. In the lower slot aka PCIe3 i can use it, but the question is: Why? When i install my or any other graphics card in PCIe2, my PC doesnt start. Even if i reset the cmos, it doesnt start i.e. there is no picture and the PC is stuck when the fans are running full on and there is no windows start in the background. Perhaps someone can give me a hint, what i could try to do or where the problem could be. Specs: ASRock Z77 Extreme4 with P2.90 Bios Intel 3570k 16 GB DDR3 RAM Gigabyte R280X 2x SSD Power Supply BeQuiet 550Watt
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Replies:
Posted By: parsec
Date Posted: 20 Apr 2016 at 1:21pm
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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. ------------- http://valid.x86.fr/48rujh" rel="nofollow"> 
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Posted By: blindhai
Date Posted: 23 Apr 2016 at 2:49am
...was set to PCIe.
...was set to Auto, now to Gen3...but no change.
...was already set to Disabled, because i didnt want to share my RAM. :)
The error is "D6", what i have seen means "D6 - No console output device found". I have tried another GPU (a 7970), and after the first CMOS reset, i could boot up the pc, i could configurate the bios. I then replaced the gpu with my r280x and had the D6 again. And then back again to the 7970 and D6 again. After each replacement i have resetted the CMOS with the switch. Perhaps there is loose connection, but i couldnt figure out where it is...yet.
checked, but there was everything ok. [/QUOTE]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.[/QUOTE] I couldnt see there any problems. I have cleaned with a smooth brush, so i do no damage to the electronics. Does that mean my GPU doesnt work at 100%? Do i have less graphic power?
I will check that on the weekend. Thank you for your help so far! :)
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parsec wrote: