PCIex1_2 and PCI2x1_3 not working

Toggle sidebar Toggle sidebar
R

Ramus

Prominent
Jun 3, 2017
3
0
510
I have Gigabyte GA-970A-DS3P mobo which has

  • 3 x PCIex1 slots, 1
    1 x PCIex16 slot,
    1 x PCIex4 slot,
    1 x PCI1 slot and
    1 x PCI2 slot.
Product Image - https://www.amazon.com/dp/B00CX4MUCC.

PCIex1 riser plugged in PCIex1_1 - works
GTX 1060 plugged in PCIex16 - works
GTX 1060 plugged in PCIex4 - works
risers plugged in on PCIex1_2 and PCIex1_3 are not getting detected.

Somewhere I read that if I use PCIex4 then PCIex1_2 and PCIex1_3 will get disabled. Assuming that is true, I removed GTX 1060 from PCIex4 slot and I see still those 2 slot do not get detected..

Am I missing anything here.

I also read somewhere that if I plug PCIex1 riser in PCIex4 slot I should be able to use PCIex1_2 and PCIex1_3 but even that is not what is happening...

Please advice..

Udpate:
Somewhere = https://forum.giga-byte.co.uk/index.php?topic=6994.0
 
Solution
Vitric9
Sorry, i meant not bandwidth but i meant the expansion slot section, which was a mistake and i do not know the manual for your board has the same info for the section "Onboard Device Configuration" Basically there is 3 available options for what the third PCIe x16 slot. Auto, x4 and x1. And I am still unsure as to what it really does. Something about resource optimization and each option may leave certain sata ports and PCIe x1 slots unavailable. Then there is another page which is regarding NB configuration which basically reads that the user can select the particular PCI Express that their graphics card is using. 3.0, 2.0, or 1.1 but i think the AMD 970 Chipset is limited to 2.0 and 1.1.
I do apologize for any confusion.

Note...
Sort by date Sort by votes
Vitric9

Vitric9

Distinguished
Jan 26, 2014
1,368
1
19,665
Sorry, i meant not bandwidth but i meant the expansion slot section, which was a mistake and i do not know the manual for your board has the same info for the section "Onboard Device Configuration" Basically there is 3 available options for what the third PCIe x16 slot. Auto, x4 and x1. And I am still unsure as to what it really does. Something about resource optimization and each option may leave certain sata ports and PCIe x1 slots unavailable. Then there is another page which is regarding NB configuration which basically reads that the user can select the particular PCI Express that their graphics card is using. 3.0, 2.0, or 1.1 but i think the AMD 970 Chipset is limited to 2.0 and 1.1.
I do apologize for any confusion.

Note on PCIe x16.
Using the second slot on my board recently because the plastic fell of the pins on the first slot, the MB Automatically chooses PCI Express 1.1 under Auto despite the GPU being 3.0. Nevertheless performance is negligible.
 
Upvote 0 Downvote
Solution
E

eyupo92

Distinguished
Aug 23, 2010
165
0
18,860
According to page 5 of your motherboard user manual, you are asking the wrong question, it should have been : 'why is the card on my PCIx1_1 work ?'

Now, we know that your chipset AMD 970 has only PCIe 2.0 lanes - and there are 22 lanes connected to Northbridge ( the lanes connected to Southbridge are irrelevant to our discussion ) and on SLI configuration it allocates the x16 lane into x8+x8 mode - meaning that your gtx 1060 are running on x8 mode each.

Anyway, with 16 lanes allocated to GPU(s), there are 6 PCIe 2.0 lanes left. Page 5 shows that these 6 lanes are allocated to 3 PCIe x1 slots AND [ 1 X LAN AND 4XUSB PORTS CONNECTED TO VIA VL805 USB CHIP].

Try disabling the LAN port if you are not using it and try again. Then try disabling the VIA chip and remove the usb devices connected to it and try again. These options are described as last two items on page 24 of your mobo user manual. Also the same page says disable onboard audio if one of the cards is a third party sound card.

If one or both or all three of them works, great.

As I said, I was surprised that the 1_1 slot works.

Altough the slots are capable of PCIe 2.0, the GTX 1060 s you have are PCIE 3.0 devices, so somehow they might consume more bandwidth then they should be able to - this is theoretically impossible, but in practice I have seen so much PCIe lane allocation/usage shit, I would not be surprised.

As a final note: you are complaning about pcıe x1 cards not working and do not supply any information on these, a very bad way to ask for help. I suspect the one on 1_1 is a wireless network card ; so you could get away by disabling LAN port and freeing 1 lane. Then I suspect that one of the other cards is a sound card - which might be related to disabling the onboard audio.

Anyway, let me know if it works or not.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom