2020 Dell XPS 15 7590 [9th,6C,H] + RTX 2060 over Thunderbolt 3 inside Lenovo BoostStation enclosure stuck at 2.5 GT/s
For this test I have disabled the iGPU and dGPU on my laptop, and only the external display connected to the eGPU is enabled. The laptop display is disabled. I have not connected any other peripherals to the eGPU even though it supports a SATA SSD and has a few USB slots.
The PCIe root and upstream port seem to be doing 8 GT/s when under load:
but the downstream port and the following upstream port are stuck at 2.5 GT/s:
everything down from there is doing 8 GT/s:
The performance in terms of frame rates I get from my RTX 2060 is significantly lower than what other users with the same card report and I have confirmed no CPU throttling. In fact, its performance is closer to my discrete GTX 1650 than to what other users report for this card, so I suspect this is the problem.
Do eGPU users get higher PCIe speeds than 2.5 GT/s? Can I solve this?
You are seeing the app query the PCIe register space and decipher it. This often not reporting correctly for Thunderbolt buses. Can confirm this by running CUDA-Z or AIDA64 and comparing to maximum bandwidth values recorded at https://egpu.io/builds#perf
@nando4, Thanks, the Host to Device speed I get is comparable to what is recorded on that page. I guess that means it is performing at its best and won't do any better. Thanks!