vertex72
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Hello,
My Evga GTX 970 SSC ACX2.0+ is not recognize at x16 , only x8. My second GTX 970 SSC ACX2.0 is recognize in 16X in the same motherboard same slot.
I've not noticed this issus before because the 2 cards have been used in sli with a i7 7800x who was only capable of x16 + x8. but now I have a i9 9820x who was capable of x16 / x16 and the car is still in x8.
Tested with:
evga x299 micro 2
i9 9820x
i7 7800x
also tested with:
Msi b450i gamings plus ac
ryzen 3 3100
ryzen 3 1200af (970 only recognize at x4 with bios tweak, faulty cpu I think because same issus with the second 970)
Rampage 3 gene
x5670
Maximus VIII hero
i7 6700k
Do someone know something to solve that ? I think it was and issus in the graphic card it self
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coolmistry
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 02:16:48
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This is normal! Nothing wrong with your graphic card! When you have two same 970 SSC ACX2.0 GPU it will become x16 and x8 or if just one graphic card it will be at x16. Please check in your manual book for X299 Micro ATX2 pages 11 On your motherboard see pic for number 11  It same to my Z370 Classy do support both graphics x8 if I want one Graphic card then then it will become x16. Do not worry it no different speed really! It for share to other device on your motherboard! Have a look on my in NVIDIA inspector got my two GTX1080 Classy  
post edited by coolmistry - 2020/06/15 02:21:50
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vertex72
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 03:26:32
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according to x299 micro 2 data sheet the board is able to do x16 + x16 with a 44 pcie line cpu (like in my case).
the probleme is from my graphic card and not from my motherboard.
does a clean of full pcb can solve it ? or putting it in an oven 220°C 5Min ?
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Cool GTX
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 08:32:44
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vertex72
according to x299 micro 2 data sheet the board is able to do x16 + x16 with a 44 pcie line cpu (like in my case).
the probleme is from my graphic card and not from my motherboard.
does a clean of full pcb can solve it ? or putting it in an oven 220°C 5Min ?
Run GPU-Z & test the PCIe status Confirm your PCIe BIOS settings ... if set to Auto .. try setting to 3.0 anything in the x4 slot ? how many M.2 devices ? Manual page 22 PCIe lanes
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vertex72
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 08:41:21
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pcie slot set at x16 and x16 3.0 , 1 nvme x4 in vme slot, nothing in pch x4.
to resume,
graphic card 1 : evga gtx 970 ssc acx2.0+
x16 3.0 in all slot in differents motherboard
graphic card 2 : evga gtx 970 ssc acx2.0+
x8 3.0 in all slot, test in different motherboard and still x8
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Cool GTX
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 10:13:58
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did you use the GPU-Z test ? some cards only show PCIe 3.0 under load ... no idea why just remember reading it
Inspect your MB PCIe sockets with a light & magnification ... could be some sort of issue ?
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vertex72
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 11:30:27
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Yes, bios set to 3.0, with gpu-z stress test gpu 1 is at x16 and gpu 2 at x8
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Sajin
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 13:29:08
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Your video card comes with dual vbios. Does the secondary vbios also cause the same issue? If yes, you'll need to rma your card.
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vertex72
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 14:13:24
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Ok i tested the second bios, stil x8, tomorrow i’ll clean the card with contact cleaner, card is not under warranty and no sticker on it for SN
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Sajin
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 14:19:21
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Cool GTX
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 14:57:11
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wonder if it has the stock BIOS on the card ?
No warranty ... then EVGA will not service the card
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vertex72
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/15 15:12:32
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I know x8 is like x16 in perf but i come from a 7800x who was limited to 16x/8x to a 9820x Who can handle x16/x16 and i want x16/x16 ^^'
sli 970 is stil powerfull, 120-130 fps in ultra 1440p in battlefield V ( only post process in low)
card OC to 1506 gpu and 2000 memory in h24.
I'll try to take the bios from the first car (work in x16) and flsh it in the second card
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vertex72
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/16 11:35:56
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Ok I have flashed the bios of the first card ((work in x16) ton the seconde card (only x8), nothing change
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Sajin
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/16 13:05:39
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veganfanatic
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Re: Evga GTX 970 SSC ACX2.0+ not recognize at pcie x16, only x8
2020/06/23 11:44:03
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I was using an old GTX 750 for a Physx Card for a while and it was in an x4 slot and operating with x2 at idle. Card works fine so as the PCIe speed picks up when there is a workload, been testing the GTX 690 performance and it does a lot better than 99% of review sites claim. 
post edited by veganfanatic - 2020/06/23 11:51:28
  Corsair Obsidian 750D Airflow Edition + Corsair AX1600i PSUMy desktop uses the ThinkVision 31.5 inch P32p-20 Monitor.My sound system is the Edifier B1700BT
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