Riser Cables makes my RTX 3080 slower

[vleds123]

Hello peeps how is everyone doing?

I had a phantek vertical GPU mount and just learned about PCIe 3.0 and 4.0. My Vega 56 was working very well when I was using the riser and now that I upgraded to a MSI 3080 LHR, im getting 60 fps at 100% usage on starcraft 2/battlefield 1. 

I tried to go into the bios to change the PCIe to 3.0 but i cant seem to find the setting although I'm following the steps correctly (based on YouTube and forums). Now for my issue I cant seem to find anything litterally anything online so if anyone can give me any tip to change PCIe from 4.0 to 3.0.

Rig specs

I7 10700 KF

RTX 3080 Trio Gaming Z

T-Force 32Gb 16x2 running at 2933 Mhz

Z490-F ROG Strix (latest BIOS 2103)

NVME 256Gb

NVME 512Gb

Phanteks vertical GPU mount 3.0 PCIe

 

[Kilrah]

10th gen doesn't do PCIe 4.0, so it's 3.0 already.

 

[vleds123]

Just now, Kilrah said:

10th gen doesn't do PCIe 4.0 anyway.

But I am running PCIe 4.0 and I can confirm based on CPU-z and also since ive tried both ways with and without the Riser and theres a huge difference. Yes I know use the GPU without the riser but I want to have a vertical GPU and some users are able to change from 4.0 to 3.0.

[Kilrah]

You cannot be running PCIe 4.0 with a 10700KF and Z490.

 

What does GPU-Z say with the little test running?

 

You DO have the riser connected to the top PCIe slot, right?

[vleds123]

2 minutes ago, Kilrah said:

You cannot be running PCIe 4.0 with a 10700KF and the GPU connected to the main slot.

 

What does GPU-Z say with the little test running?

 

You DO have the riser connected to the top PCIe slot, right?

 

My riser is connected to the main slot and im not running a test with GPU-Z using just CPU-Z to check and ive noticed something. When im the Mainboard tab I see Bus Specs PCI-Express 3.0 however below in the Graphic interface I see

 

Bus: PCI-Express 4.0 and current

link width: x1

Max supported: x16

Current Link Speed: 2.5 GT/s

Max supported: 16.0 GT/s

 

thats weird

[Kilrah]

That's why I ask to check with GPU-Z, it's better at that and has a little built-in "stress test" to use to load the card because when it's idle power saving measures will reduce the link speed making the reading irrelevant.

[vleds123]

Just now, Kilrah said:

That's why I ask to check with GPU-Z, it's better at that and has a little built-in "stress test" to use to load the card because when it's idle power saving measures will reduce the link speed making the reading irrelevant.

Okay downloaded and Idk if I should wait but im using 100% at 1920Mhz 64 Degree. And it is also saying PCIe X16 4.0 @ x1 3.0

[Kilrah]

What that says is the card is capable of running 4.0 x16, but it's currently running at 3.0 x1. 3.0 is normal since it's all your machine supports but x1 is not normal under load.

 

So if your riser's connectors are clean and really plugged correctly on both ends and into the top mobo slot it likely broke during the swap.

[IkeaGnome]

32 minutes ago, vleds123 said:

Hello peeps how is everyone doing?

I had a phantek vertical GPU mount and just learned about PCIe 3.0 and 4.0. My Vega 56 was working very well when I was using the riser and now that I upgraded to a MSI 3080 LHR, im getting 60 fps at 100% usage on starcraft 2/battlefield 1. 

I tried to go into the bios to change the PCIe to 3.0 but i cant seem to find the setting although I'm following the steps correctly (based on YouTube and forums). Now for my issue I cant seem to find anything litterally anything online so if anyone can give me any tip to change PCIe from 4.0 to 3.0.

Rig specs

I7 10700 KF

RTX 3080 Trio Gaming Z

T-Force 32Gb 16x2 running at 2933 Mhz

Z490-F ROG Strix (latest BIOS 2103)

NVME 256Gb

NVME 512Gb

Phanteks vertical GPU mount 3.0 PCIe

 

As said above, it can't be running at 4.0. CPU and board both don't support it.

As for frame rate issues, when you installed the new GPU, did you use DDU in safe mode? You could be having issues with AMD drivers conflicting with the NVIDIA ones.

[vleds123]

13 hours ago, Kilrah said:

What that says is the card is capable of running 4.0 x16, but it's currently running at 3.0 x1. 3.0 is normal since it's all your machine supports but x1 is not normal under load.

 

So if your riser's connectors are clean and really plugged correctly on both ends and into the top mobo slot it likely broke during the swap.

any advice on what I should do then? maybe buy another riser cable im trying to look for a 4.0 one. There is the ROG Strix RIser cable 3.0 do you think it will perform better than the one i currently have?

[vleds123]

13 hours ago, IkeaGnome said:

As said above, it can't be running at 4.0. CPU and board both don't support it.

As for frame rate issues, when you installed the new GPU, did you use DDU in safe mode? You could be having issues with AMD drivers conflicting with the NVIDIA ones.

So basically its not a driver issue since I used DDU already and same problem happened when I used a 3070 Ti and I thought the 3070Ti was bad then I bought this RTX 3080 and I used it without the riser and it was working fine but then I used the vertical yesterday and im back to low frame rates.  

[DarkSmith2]

to answer your initial question, you can change the PCI-E gen in Asus bios usually here:
Advanced -> System Agent (SA) Configuration -> PEG Port Configuration

"pci-e link speed" can be set to "gen3"

 

ive heard weird things happening when on "auto" settings with 30series cards on z490, so ill just provide the answer to your question.

But chances are that your riser is faulty.. (really common, even with expensive ones)

[vleds123]

31 minutes ago, DarkSmith2 said:

to answer your initial question, you can change the PCI-E gen in Asus bios usually here:
Advanced -> System Agent (SA) Configuration -> PEG Port Configuration

"pci-e link speed" can be set to "gen3"

 

ive heard weird things happening when on "auto" settings with 30series cards on z490, so ill just provide the answer to your question.

But chances are that your riser is faulty.. (really common, even with expensive ones)

Okay great ill try this when i get home. I really hope this works

[jwwagner25]

5 hours ago, vleds123 said:

any advice on what I should do then? maybe buy another riser cable im trying to look for a 4.0 one. There is the ROG Strix RIser cable 3.0 do you think it will perform better than the one i currently have?

why would you want a 4.0 if you can't use it? that would be like spending extra on gen4 nvme when mobo only supports gen3?

[vleds123]

15 minutes ago, jwwagner25 said:

why would you want a 4.0 if you can't use it? that would be like spending extra on gen4 nvme when mobo only supports gen3?

I don't understand how any of this work. All I know was that If i plug my 3080 directly into the motherboard i get all the performance I need so 144fps on every game with vsync on. But when i use the riser to have a vertical gpu mount it gets slow this is why.  I want to use the riser it looks better in my build

[vleds123]

4 hours ago, DarkSmith2 said:

to answer your initial question, you can change the PCI-E gen in Asus bios usually here:
Advanced -> System Agent (SA) Configuration -> PEG Port Configuration

"pci-e link speed" can be set to "gen3"

 

ive heard weird things happening when on "auto" settings with 30series cards on z490, so ill just provide the answer to your question.

But chances are that your riser is faulty.. (really common, even with expensive ones)

it didn't work im still getting the same result  hovering around 70 fps

[jwwagner25]

3 minutes ago, vleds123 said:

I don't understand how any of this work. All I know was that If i plug my 3080 directly into the motherboard i get all the performance I need so 144fps on every game with vsync on. But when i use the riser to have a vertical gpu mount it gets slow this is why.  I want to use the riser it looks better in my build

man, your riser is broken. as you saw from your GPU_Z result, with the riser it is only running at 3.0x1 speed. it should be 3.0x16. You need a new riser cable. if you insist on getting pcie gen 4 riser it's going to cost a lot more than just getting what you actually need which is a 3.0 riser. 

[vleds123]

3 minutes ago, jwwagner25 said:

man, your riser is broken. as you saw from your GPU_Z result, with the riser it is only running at 3.0x1 speed. it should be 3.0x16. You need a new riser cable. if you insist on getting pcie gen 4 riser it's going to cost a lot more than just getting what you actually need which is a 3.0 riser. 

Oh okay I can try buying the Asus ROG rs200 but its like 50-60$

[jwwagner25]

sure, I see it's $50 on amazon. Really though I don't understand the need for vertical mount. Are you staring at your computer case more often than the actual screen/monitor? At least in the meantime you should have the GPU mounted normally so that you can get full performance. Maybe leave it for a week or two and see if you get used to normal mount. Vertical seems silly to me - just my opinion. Best of luck. 

[Kilrah]

Yup, up to you to decide whether the looks are worth the expense...

[Montana One-Six]

20 hours ago, vleds123 said:

NVME 256Gb

NVME 512Gb

FYI: using 2 nvme drives will limit your PCIe 1 slot to 8x. So you won't see 16x either way.

 

[Kilrah]

2 minutes ago, Montana16 said:

FYI: using 2 nvme drives will limit your PCIe 1 slot to 8x. So you won't see 16x either way.

 

That's incorrect. 

[Montana One-Six]

11 minutes ago, Kilrah said:

That's incorrect. 

There are 2 m.2 slots. One is connected to the CPU(m.2_1) and one to the Chipset(m.2_2). If you use the m.2_1 slot in PCIe mode your PCIe 1 slot will be limited to x8.

 

[vleds123]

1 hour ago, jwwagner25 said:

sure, I see it's $50 on amazon. Really though I don't understand the need for vertical mount. Are you staring at your computer case more often than the actual screen/monitor? At least in the meantime you should have the GPU mounted normally so that you can get full performance. Maybe leave it for a week or two and see if you get used to normal mount. Vertical seems silly to me - just my opinion. Best of luck. 

Yes this is exactly what im gonna do and also I have the RTX 3080 MSI which has nice rgb and aesthetic if mounted vertically and all of case has rgb synced and everything so this kinda the cherry on top

[vleds123]

30 minutes ago, Montana16 said:

There are 2 m.2 slots. One is connected to the CPU(m.2_1) and one to the Chipset(m.2_2). If you use the m.2_1 slot in PCIe mode your PCIe 1 slot will be limited to x8.

 

are you sure about that? I do have 2 nvme on my motherboard. Which one should I try removing?