Jump to content
Search In
  • More options...
Find results that contain...
Find results in...
Aleppi

GTX 1080 TI only works in the first PCI-E slot, not the second

Recommended Posts

Posted · Original PosterOP

So I have been using my GTX 1080 TI in the first slot of my Asus Z87 Pro motherboard for a while without issues, but I bought a RX 5500 XT for Hackintosh. But to use the AMD card for Hackintosh, I need it to be in the first PCI-E slot. Putting the AMD card in the first slot and the 1080 TI in the second slot works, but the BIOS doesn't detect a card in the second slot. Putting the GTX 1080 TI in the first slot and the AMD card in the second slot, both cards are detected and are running at 8x. So my AMD card works in both slots, which means that the second PCI-E slot is working, but my GTX 1080 TI only works in the first slot, which means that the 1080 Ti is working. But I cannot seem to get the 1080 TI working in the second slot.

 

Does anyone have any suggestions on how to fix this?


i7 4770k/Asus GTX 1080 TI/Asus RX5500 XT/Corsair Vengeance Pro 16GB/Samsung 840 Pro 256GB/Seagate Barracuda 3TB/AX860i/ASUS Z87 PRO/Fractal Design Define R4/HD 598

Link to post
Share on other sites

Uninstall all drivers on the system (DDU software, in safe mode as it will direct you too) then download the drivers fresh with this setup you intend to have.  At least that's what I would do if I had an issue with a second card I knew that worked.


Workstation Laptop: Dell Precision 7540, Xeon E-2276M, 32gb DDR4, Quadro T2000 GPU, 4k display

Ryzen Rig 2: ASrock B450 Pro4 ATX, Ryzen 7 1700 @ 4.2ghz all core 1.4vCore, AMD R9 Fury X w/ Swiftech KOMODO waterblock, Custom Loop 2x240mm + 1x120mm radiators in push/pull 16gb (2x8) 3600mhz V-Color Skywalker (or 4x8gb DDR4 2666mhz for large tasks), Corsair HX850 PSU, 128gb Patriot Scorch NVMe Win 10 boot drive, 500gb Samsung 840 EVO SSD, CoolerMaster HAF XM Case.  Zalman K600S keyboard, Zalman ZM-GM1 mouse, Hannspree HF207 and Acer AL2016W monitors

https://www.3dmark.com/3dm/37004594?

Ryzen Rig 1: ASUS B350-PRIME ATX, Ryzen 7 1700, Sapphire R9 Fury Tri-X Nitro 4gb HBM, 16gb (2x8) 3200mhz V-Color Skywalker, ANTEC Earthwatts 750w PSU, MasterLiquid Lite 120 AIO cooler in Push/Pull config as rear exhaust, 250gb Samsung 850 Evo SSD, Patriot Burst 240gb SSD, Cougar MX330-X Case.  Zalman K600S keyboard, Zalman ZM-GM1 mouse, Acer XF270HU 2560x1440 144hz IPS monitor

https://www.3dmark.com/3dm/37628874?

Dwight: The Mixed Metals Loop Media Center.  Ask me about it.  Currently decommissioned to move to an mATX setup on a new MOBO once I pick one out (getting its facelift as of June 2020 have new air cooler, drives etc.  About 60% finished.  Will no longer be a closed loop system.

Schrute: ASUS M5A99FX Pro R2.0, FX 8350, Sapphire R9 Fury Tri-X Nitro 4gb HBM, 16gb (4x4) Corsair Vengeance DDR3 1600mhz, Sparkle/FSP 650w PSU, Corsair H100i GTX 240mm AIO w/ 12mm thick fans to fit in top exhaust, 256gb TIMETEC SSD, 1tb WDBlack HDD, Rosewill Nautilus 1.0 case.  DSI 90-Key Mechanical Keyboard w/ Cherry Red switches, Generic mouse, 37" 1080p TV

Micro Form Factor Dell OptiPlex 3040: Dell 0MGK50 A02, i3-6100T, 2x4gb DDR3 1600, Team Group 120gb SSD, 500gb Seagate 7mm HDD attached storage, Windows 10 Pro, Logitech K400+, USB Wifi adapter all vesa mounted to the back of a 37" 1080p TV for form factor in the kitchen

Linux Box: Toshiba Laptop, i7 620M, NVS graphics, 2gb ram tinker toy at the moment.  Running Manjaro at the moment

APU Laptop: I need to clean this things TIM up so it can boot into Windows 7 for more than 5 minute before overheating at idle, it has things, I just haven't been on it in 2 years or so

Link to post
Share on other sites
Just now, Korben said:

Take a look in your manual :)

ASUSZ87ProPCIe.JPG

That means with a single card using x16 it will have no PCIe lanes for the second slot.

 

If you share the slots PCIe bandwidth they can both operate at x8 x8.  Remember he is seeing the cards when mounted in reverse (AMD card on bottom, NVIDIA on top, both at x8)


Workstation Laptop: Dell Precision 7540, Xeon E-2276M, 32gb DDR4, Quadro T2000 GPU, 4k display

Ryzen Rig 2: ASrock B450 Pro4 ATX, Ryzen 7 1700 @ 4.2ghz all core 1.4vCore, AMD R9 Fury X w/ Swiftech KOMODO waterblock, Custom Loop 2x240mm + 1x120mm radiators in push/pull 16gb (2x8) 3600mhz V-Color Skywalker (or 4x8gb DDR4 2666mhz for large tasks), Corsair HX850 PSU, 128gb Patriot Scorch NVMe Win 10 boot drive, 500gb Samsung 840 EVO SSD, CoolerMaster HAF XM Case.  Zalman K600S keyboard, Zalman ZM-GM1 mouse, Hannspree HF207 and Acer AL2016W monitors

https://www.3dmark.com/3dm/37004594?

Ryzen Rig 1: ASUS B350-PRIME ATX, Ryzen 7 1700, Sapphire R9 Fury Tri-X Nitro 4gb HBM, 16gb (2x8) 3200mhz V-Color Skywalker, ANTEC Earthwatts 750w PSU, MasterLiquid Lite 120 AIO cooler in Push/Pull config as rear exhaust, 250gb Samsung 850 Evo SSD, Patriot Burst 240gb SSD, Cougar MX330-X Case.  Zalman K600S keyboard, Zalman ZM-GM1 mouse, Acer XF270HU 2560x1440 144hz IPS monitor

https://www.3dmark.com/3dm/37628874?

Dwight: The Mixed Metals Loop Media Center.  Ask me about it.  Currently decommissioned to move to an mATX setup on a new MOBO once I pick one out (getting its facelift as of June 2020 have new air cooler, drives etc.  About 60% finished.  Will no longer be a closed loop system.

Schrute: ASUS M5A99FX Pro R2.0, FX 8350, Sapphire R9 Fury Tri-X Nitro 4gb HBM, 16gb (4x4) Corsair Vengeance DDR3 1600mhz, Sparkle/FSP 650w PSU, Corsair H100i GTX 240mm AIO w/ 12mm thick fans to fit in top exhaust, 256gb TIMETEC SSD, 1tb WDBlack HDD, Rosewill Nautilus 1.0 case.  DSI 90-Key Mechanical Keyboard w/ Cherry Red switches, Generic mouse, 37" 1080p TV

Micro Form Factor Dell OptiPlex 3040: Dell 0MGK50 A02, i3-6100T, 2x4gb DDR3 1600, Team Group 120gb SSD, 500gb Seagate 7mm HDD attached storage, Windows 10 Pro, Logitech K400+, USB Wifi adapter all vesa mounted to the back of a 37" 1080p TV for form factor in the kitchen

Linux Box: Toshiba Laptop, i7 620M, NVS graphics, 2gb ram tinker toy at the moment.  Running Manjaro at the moment

APU Laptop: I need to clean this things TIM up so it can boot into Windows 7 for more than 5 minute before overheating at idle, it has things, I just haven't been on it in 2 years or so

Link to post
Share on other sites
Just now, Tristerin said:

That means with a single card using x16 it will have no PCIe lanes for the second slot.

 

If you share the slots PCIe bandwidth they can both operate at x8 x8.  Remember he is seeing the cards when mounted in reverse (AMD card on bottom, NVIDIA on top, both at x8)

Yeah I know. I have to learn to read before posting. Sorry.

Link to post
Share on other sites
4 minutes ago, Korben said:

Yeah I know. I have to learn to read before posting. Sorry.

No worries!  Just didn't want OP spending time on that


Workstation Laptop: Dell Precision 7540, Xeon E-2276M, 32gb DDR4, Quadro T2000 GPU, 4k display

Ryzen Rig 2: ASrock B450 Pro4 ATX, Ryzen 7 1700 @ 4.2ghz all core 1.4vCore, AMD R9 Fury X w/ Swiftech KOMODO waterblock, Custom Loop 2x240mm + 1x120mm radiators in push/pull 16gb (2x8) 3600mhz V-Color Skywalker (or 4x8gb DDR4 2666mhz for large tasks), Corsair HX850 PSU, 128gb Patriot Scorch NVMe Win 10 boot drive, 500gb Samsung 840 EVO SSD, CoolerMaster HAF XM Case.  Zalman K600S keyboard, Zalman ZM-GM1 mouse, Hannspree HF207 and Acer AL2016W monitors

https://www.3dmark.com/3dm/37004594?

Ryzen Rig 1: ASUS B350-PRIME ATX, Ryzen 7 1700, Sapphire R9 Fury Tri-X Nitro 4gb HBM, 16gb (2x8) 3200mhz V-Color Skywalker, ANTEC Earthwatts 750w PSU, MasterLiquid Lite 120 AIO cooler in Push/Pull config as rear exhaust, 250gb Samsung 850 Evo SSD, Patriot Burst 240gb SSD, Cougar MX330-X Case.  Zalman K600S keyboard, Zalman ZM-GM1 mouse, Acer XF270HU 2560x1440 144hz IPS monitor

https://www.3dmark.com/3dm/37628874?

Dwight: The Mixed Metals Loop Media Center.  Ask me about it.  Currently decommissioned to move to an mATX setup on a new MOBO once I pick one out (getting its facelift as of June 2020 have new air cooler, drives etc.  About 60% finished.  Will no longer be a closed loop system.

Schrute: ASUS M5A99FX Pro R2.0, FX 8350, Sapphire R9 Fury Tri-X Nitro 4gb HBM, 16gb (4x4) Corsair Vengeance DDR3 1600mhz, Sparkle/FSP 650w PSU, Corsair H100i GTX 240mm AIO w/ 12mm thick fans to fit in top exhaust, 256gb TIMETEC SSD, 1tb WDBlack HDD, Rosewill Nautilus 1.0 case.  DSI 90-Key Mechanical Keyboard w/ Cherry Red switches, Generic mouse, 37" 1080p TV

Micro Form Factor Dell OptiPlex 3040: Dell 0MGK50 A02, i3-6100T, 2x4gb DDR3 1600, Team Group 120gb SSD, 500gb Seagate 7mm HDD attached storage, Windows 10 Pro, Logitech K400+, USB Wifi adapter all vesa mounted to the back of a 37" 1080p TV for form factor in the kitchen

Linux Box: Toshiba Laptop, i7 620M, NVS graphics, 2gb ram tinker toy at the moment.  Running Manjaro at the moment

APU Laptop: I need to clean this things TIM up so it can boot into Windows 7 for more than 5 minute before overheating at idle, it has things, I just haven't been on it in 2 years or so

Link to post
Share on other sites

After really reading your post (:)): maybe, this just me guessing, the second slot has not enough power for a 1080Ti. Z87 is a long time ago for me, but I think there was kind of an issue/note with PCI Power on some boards. Also, and that totally a guess, the 2nd slot shares interrupts with some SATA ports and another PCI Slot. Maybe the 1080 is pickier with this than AMD? I would try to remove any device from the SATA ports (the Asmedia/brown ones) and the PCI slot (3rd one). Then check BIOS. Just to be sure.

Link to post
Share on other sites

One of the slots on the board is PCI-E 2.0 x16 in x4 mode,

Nvidia cards outright refuse to work on 4 lanes,you need at least 8 lanes for an Nvidia card to work.

Luckily you have another slot which will operate at PCI-E 3.0 x8 if the top slot is populated.


A PC Enthusiast since 2011
AMD Ryzen 5 2600@4GHz | GIGABYTE GTX 1660 GAMING OC @ Core 2040MHz Memory 5000MHz
Cinebench R15: 1382cb | Unigine Superposition 1080p Extreme: 3439
Link to post
Share on other sites
Posted · Original PosterOP

So I tried to uninstall all my drivers using DDU uninstaller, but since it was the motherboard not detecting the GPU, not Windows, nothing changed as I thought. The only populated PCI-E slot other than the GPUs is a network card in the uppermost 1x slot, so my guess is just that the 1080 TI thinks it gets too little power from the second 8x slot while the RX5500 XT doesn't seem to complain. Might try more later, but for the moment I am giving up on this, will probably have to wait until I get a new motherboard and CPU.


i7 4770k/Asus GTX 1080 TI/Asus RX5500 XT/Corsair Vengeance Pro 16GB/Samsung 840 Pro 256GB/Seagate Barracuda 3TB/AX860i/ASUS Z87 PRO/Fractal Design Define R4/HD 598

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Newegg

×