Using AORUS GTX 1080 GAMING BOX with LG Ultrafine 5K Display
In Windows, yes, you'll lose a bit of power though... assume you know you can't use it in macOS?
there are a few in various threads, last I heard it was around 5% + what's loss due to TB3. I had build with a 5K and 1070 which might give you an idea of performance (although you have a much more powerful CPU - so no bottlenecking as well as a more powerful card).
@mert_gonul I wouldn't stress the performance loss... it'll be a bit, but not experience spoiling, my set up is wayyyy past sub optimal (dual core U class CPU and loopback) and I still enjoy gaming.
Personally I wouldn't buy a gaming box though, but thats just me...
- I've seen a lot of posts from people having issues with them and having to power cycle them tot get them working again, not a big problem, and it may be because they are very popular there are more people to have issues with them, but thats not for me...
- I love small eGPUs but found that they compromise on noise, the small PSU's they use run hot and loud due to smaller fans and thats not for me.. (hence why I sold my Razer Core).
- The 1080, while still a great GPU, is getting long in the tooth and I wouldn't want to be buying old tech.
If I were you, with your laptop I'd grab a Mantiz Venus (there were a couple for sale on here) and an RTX 2060/2070/2060s/2070s. I wouldn't buy Navi atm as their drivers cause much higher performance loss in loopback (tested by @itsage). The Venus is great because its ports are rock solid (no disconnects like my V1 Core) and it has SATA connections for an internal SSD which is great for game storage.
you are right as ever... although I'm not sure I'd recommend downgrading to a now 2+ year old operating system. The Nvidia drivers themselves are not the best either, when I had a dual boot hack games would get the same fps in 4K on Windows as they would at 1080 on macOS (roughly, not fully explored). I would guess the drivers are even worse when being used in loopback so not sure I'd recommend.