Disclaimer & buying options for OCuLink eGPU adapters for reliable up to 64Gbps ePCIe 4.0 x4 connectivity is here
So I have a laptop with a 3070Ti which I am using to run CUDA stuff, and so I'm wanting to use my 6700xt eGPU (TB3/Razer Core X) for gaming. Everything is working fine and getting along, but I have a weird problem where if I plug my external display (the one I run games on) into my eGPU instead of into the laptop's HDMI port, I actually get worse performance. Does anyone have any idea of why this might be? To my understanding this is totally backwards from how it ought to work. I've attached two benchmarks from Cyberpunk 2077, the lower average FPS one is the run with the display plugged directly into the eGPU. Sorry if this is a basic question, I'm not super familiar with how Windows does stuff, so maybe I'm missing something here?
2022 16" ASUS Zephyrus M16 (RTX3070Ti) [12th,14C,H] + RX 6700 XT @ 32Gbps-TB4 (Razer Core X) + Linux Fedora 37 & Win11
2019 17" Dell Inspiron 17 7791 (MX250) [10th,4C,U] + RX 5500 XT @ 32Gbps-TB3 (Razer Core X) + Linux Pop!_OS 20.04 & Win10 1909 [build link]
@gerdoch, Thunderbolt eGPUs perform best at 4K.
1440p performance is not as good.
And of course the Nvidia driver you’re using may be better optimized for Cyberpunk than AMD’s driver.
2018 Mac Mini [8th,6C,B] + RX 6600 XT @ 32Gbps-TB3 (Sonnet Breakaway 650) + macOS 12.1 & Win10 21H1 [build link]
i guess theres an app running in the internal display that uses your eGPU
it will consume some bandwidth
you can try closing all apps running in the internal display and do again your benchmark in the external display
2023 Beelink SER7 (780M) [R7K,8C,H] + RTX 4090 @ 64Gbps-M.2x4 (OSMETA G38 OCuLink) + Win11 23H2 [build link]
@gerdoch,have you done the obvious like disable vsync so as to not be limited by the LCD refresh rate? Worth running at a lower screen resolution to see if you get above 60FPS, synonymous with a 60Hz LCD refresh rate.
Pls also consider completing a build template with your ASUS Zephyrus M16 so as to feature in the builds area of the site.
64Gbps PCIe 4.0 x4 over 80Gbps Intel Thunderbolt 5 / USB4v2 ETA starting 2024 • eGPU Bandwidth Reference • eGPU Setup 1.35
2018 15" HP ZBook Studio G5 (Q P1000) [8th,6C,E] + RX 6700 XT @ 32Gbps-M.2x4 (ADT-Link R43SG) + Win10 22H2 // compares M.2 NVMe vs TB3 & RX 6700 XT vs RTX 3070 eGPU, 2.06kg triple-M.2 NVMe slot budget Workstation [info]
2018 14" HP EliteBook 840 G5 [8th,4C,U] + RX 6700 XT @ 32Gbps-M.2x4 (ADT-Link R43SG) + Win10 22H2 // compares M.2 NVMe vs TB3 & RX 6700 XT vs RTX 3070 eGPU, 1.48kg dual-M.2 slot budget UltraBook [info]
2015 15" Dell Precision 7510 (Q M1000M) [6th,4C,H] + GTX 1080 Ti @ 32Gbps-M.2x4 (ADT-Link R43SG) + Win10 1803 // compares M.2 NVMe vs TB3 eGPU performance inc unoptimized H-CPU BIOS [build link]