eGPU bandwidth is invalid.

[Hi-Tech]

When I load eGPU, bandwidth is dramatically reduced.

As you can see, when the eGPU is not in use, the bandwidth represents a normal figure. However, when I play 3D mark or games, the eGPU load rate represents 100% and bandwidth is dramatically reduced. at the sametime GPU core performance is also dramatically reduced.

I connected the eGPU using the Nvme M.2 slot. The interface is R43SG. Then, the eGPU was connected to the external monitor to measure performance. The following picture shows the 3D mark test score and bandwidth and core performance.

[Skiiwee29]

That is normal... you're effectively hamstringing the bandwidth available by using a m.2 slot going from PCIE Gen 3 x16 to PCIE gen 3 x4... you do lose quite a bit of performance as a result. 

[Hi-Tech]

@Skiiwee29

However, the RTX2080 score is too low. Do you think the figure at 18,455 is normal?

[BTGbullseye]

6 hours ago, Hi-Tech said:

@Skiiwee29

However, the RTX2080 score is too low. Do you think the figure at 18,455 is normal?

https://www.techpowerup.com/review/nvidia-geforce-rtx-2080-ti-pci-express-scaling/

[Hi-Tech]

@BTGbullseye

According to the information you sent my performance is abnormal. I had degradation of 30 % instead of 9 percent. What can be inferred as the reason for the degradation of performance being more than three times greater than expected? Even those who went through the same procedure as me who connected to Nvme M.2 using the R43SG adapter suffered a 5% degradation. But i'm 30%.

[BTGbullseye]

16 hours ago, Hi-Tech said:

@BTGbullseye

According to the information you sent my performance is abnormal. I had degradation of 30 % instead of 9 percent. What can be inferred as the reason for the degradation of performance being more than three times greater than expected? Even those who went through the same procedure as me who connected to Nvme M.2 using the R43SG adapter suffered a 5% degradation. But i'm 30%.

Run GPU-Z and see if it might be running in PCIe 2.0 mode...

[Hi-Tech]

9 hours ago, BTGbullseye said:

Run GPU-Z and see if it might be running in PCIe 2.0 mode...

I checked it a long time ago. It's PCIe 3.0

[Kilrah]

What motherboard/system?

On many the SSD m.2's are connected to the chipset, not directly to the CPU. So some additional latency, bottlenecking and bandwidth sharing is involved.

[Hi-Tech]

1 hour ago, Kilrah said:

What motherboard/system?

On many the SSD m.2's are connected to the chipset, not directly to the CPU. So some additional latency, bottlenecking and bandwidth sharing is involved.

My chipset is Moblie Intel HM175 Express Chipset. and I use the UEFI system.

 

[Hi-Tech]

@Kilrah @BTGbullseye

Does the HDMI cable length affect eGPU performance? My HDMI cable is 3m long.

[BTGbullseye]

6 minutes ago, Hi-Tech said:

@Kilrah @BTGbullseye

Does the HDMI cable length affect eGPU performance? My HDMI cable is 3m long.

Not in the slightest.

 

How many USB 3.0 ports do you have? (they are usually connected to a PCIe lane or 4) What exact system are you using? (full specs, and manufacturer)

[Hi-Tech]

17 minutes ago, BTGbullseye said:

Not in the slightest.

 

How many USB 3.0 ports do you have? (they are usually connected to a PCIe lane or 4) What exact system are you using? (full specs, and manufacturer)

This is the I/O Port that my laptop has.

 

HDMI 2.0 x 1, mini DP 1.3 x 1, RJ45 x 1, Thunderbolt™ 3(Type-C)*1
USB 3.0 (Type-A)*4, USB 3.1 Gen.2 (Type-C)*1,
Audio Jack : Earphone x 1 (Hi-Fi/With SPDIF out), MIC in x 1
SD Card Reader x 1 (UHS-II), DC Jack x 1

 

I have four USB 3.0 ports. 

Everything about my laptop is on the following link : https://us.aorus.com/product-detail.php?p=546

and I took a screenshot to make it easier for you to see the information.

[Hi-Tech]

58 minutes ago, BTGbullseye said:

Not in the slightest.

 

How many USB 3.0 ports do you have? (they are usually connected to a PCIe lane or 4) What exact system are you using? (full specs, and manufacturer)

I'll show you HWinfo if you want.

[BTGbullseye]

6 hours ago, Hi-Tech said:

I'll show you HWinfo if you want.

Actually, it's looking more like a software or driver issue right now. What all was running in the background when the benchmark was running?

[Hi-Tech]

7 hours ago, BTGbullseye said:

Actually, it's looking more like a software or driver issue right now. What all was running in the background when the benchmark was running?

Steam

AhnLab Safe Transaction

AhnLab V3 Lite

Intel XTU

MSI Afterburner

RivaTunerStatisticsServer

Killer Control Center

Nvidia Setup

HWMonitor

etc...(There are too many background processes, so I'll put up screenshots.)

[BTGbullseye]

Chrome is a huge detriment to system performance in benchmarks if it's running in the background, as are many antivirus programs. (like the AhnLabs and nProtect stuff) Definitely turn them off when benchmarking.

 

You want to make sure the Nvidia installer isn't actually running when you're benchmarking either.

 

Closing MSI Afterburner would be a good idea too, since RTSS is notorious for causing issues with DX11 and DX12 tests. (usually crashes, but performance drops are also fairly common) ASDF, dtyWork, FloEFD, GSMG, HNC Update, INISafe, Java Update Scheduler, OC Gauge, PerfTune, SMV4, SoftEther, System Guard, Wizvera, Xtu, and all the update services for them should probably also be closed. (and several could probably be entirely removed from your system, but that's an entirely different subject)

 

Try running the benchmark with those off, and see if it helps.

[xAcid9]

On 11/1/2019 at 8:08 PM, Hi-Tech said:

However, the RTX2080 score is too low. Do you think the figure at 18,455 is normal?

Found this 

He got similar graphic score as yours so i guess it just the limitation of the eGPU?

[Hi-Tech]

3 hours ago, xAcid9 said:

Found this 

He got similar graphic score as yours so i guess it just the limitation of the eGPU?

I think you're right. I have a pretty similar performance. Since the RTX 2080 is the latest graphic series, it may not be ready for eGPU to digest its power. You find a suitable example and perhaps I may be normal. Thank you for your answers. 

 

and I also found the same case with me on egpu.io

https://egpu.io/forums/builds/2018-15-razer-blade-15-rtx-208032gbps-tb3-asus-xg-station-pro-win10-1803-itsage/#post-43867

[Hi-Tech]

@BTGbullseye

You have responded to me constantly and have cared a lot about my problems. Thank you.

[Hi-Tech]

@Skiiwee29 @BTGbullseye @Kilrah @xAcid9
Thank you all for answering.