Since I have been traveling a lot lately, constantly changing house, I considered selling my Onexplayer X1 Pro to buy a new more powerful laptop for better gaming at higher resolutions and better graphics on external displays, but apparently I've found a better solution that I wasn't even considering. An external eGPU!

But why the Onexgpu 2 with the AMD Radeon 7800m?

- First of all, I have a dual boot with Windows 11 and BazziteOS, and apparently on Linux to be sure to have better compatibility, it's better to buy an AMD GPU rather than a Nvidia one. Also, it is easier to control since I just need a single app to update the drivers of both processor and graphic card since both are AMD.

- I had to consider that since I travel a lot, I needed an eGPU that it's easier to transport in a backpack, and this excludes all the desktop eGPU configurations (like the Aoostar AG02 or AG03), making possible only mobile GPUs.

- My Onexplayer X1 Pro with the Ryzen 9 HX370 is one of the few handhelds with still an Oculink port, so it was mandatory to buy an eGPU with Oculink support, for better stability and performance.

- The price... It doesn't make sense to spend thousands of euros or dollars on an external eGPU, because at that point I could have directly bought a better laptop with the latest RTX 50 series GPU instead of considering an eGPU.

So, how much did I pay?

I just got lucky, searching around online on the second hand market, I found this Onexgpu 2 for sale at €550, I proposed €500 and the guy accepted, making this the cheapest and best option at the moment probably. At this price I don't think there are better deals, especially considering that this is the latest and most powerful portable AMD eGPU, and I couldn't find a used Aorus RTX5060Ti Ai box, and that brand new costs about 1000€ here in Europe (literally double the price).

And the performance? Are they better?

YES! Of course I was expecting a big jump, but playing Cyberpunk at 3440x1440p with high settings and the ray tracing active on everything, at an average of about 60fps, wasn't on my bingo card!

Just for comparison, the same settings with the integrated GPU on my handheld (the Radeon 890m) give an average of 12fps, and even dropping the resolution to 2560x1080p it still cannot play at 30fps stable.

We are talking about a 500% increase in performance with Oculink and 400% with USB-C Thunderbolt 4!

P.S. just for info, the monitor is a Gawfolk GF340C, bought it on Amazon for €109 "used like new" and the controller is a Flydigi Apex 5, bought with the bundle (carrying case, charging dock, extra sticks and dpads) for about €86 on eBay.

So glad I went this route instead of dropping a ridiculous amount of money on a desktop.

I can use a TB5 cable with an AOOSTAR 02+XAX (I can't find many Tb4) ???

Hey

Im trying my egpu 5070ti with oculink with my new nuc and it's work very well

No need to get the fix error 43 and all you need is to activate option in bios and install NVIDIA graphic drivers

So here the result with oculink

What do you think ?

Has anyone tested direct GPU-to-GPU transfers between an internal GPU and an ASM2464-based USB4 eGPU?

My setup is a Minisforum MS-01, i9-12900H, internal RTX 2000 Ada 16 GB and external RTX A2000 12 GB in an AOOSTAR 800 W USB4 dock.

With experimental NVIDIA driver modifications, the external A2000 can PUSH data into the internal Ada, but the reverse fails. Peer reads fail in both directions.

We tried mapping/ordering changes and BIOS/FSP changes with verified register readback, without resolving it.

Does anyone know whether ASM2464 firmware or Intel PEG↔TCSS routing restricts peer-origin traffic? A comparable setup, firmware reference or transaction-level diagnostic would help.

Logs and experiments:
https://github.com/PieroBorgatta/CaskLogic-PCIe-P2P-Lab