2018 15" HP Omen 15 (GTX1070-SLI) [8th,6C,H] + RTX 2080 Ti @ 32Gbps-TB3 (HP OMEN Accelerator) + Win10 [hammerpod]
2018 HP Omen 15-dc0900nz, 15" 144Hz screen /Intel i7 8750H CPU, 2.2 Ghz / 512 GB NVME SSD / 32 GB Ram
HP Omen Accelerator Case
KFA2 Geforce RTX 2080Ti
Seasonic Focus Plus Gold 750W PSU
Samsung 4k Screen directly plugged into the Geforce
HP Omen Software: https://imgur.com/h5YX6VY
Cuda-Z and GPU-Z: https://imgur.com/VZbCKza
Superposition Benchmark 4K Optimized: https://imgur.com/UTwhdru
Superposition Benchmark 1080p Max: https://imgur.com/E2w3su6
FurMark 4k: https://imgur.com/1ggtlbn
Since my laptop already comes with a Geforce 1070 Max-Q GPU, I wanted to take one of the best available GPUs and put it into the nice Omen eGPU enclosure. It was also clear that this includes to replace the 500 W psu which wouldn't be able to handle the RTX. The only fitting psu's I found are the Seasonic Focus Plus series (150mm length). Because if you choose a larger psu it interferes with the mainboard-power connector from the Omen Accelerator and you wouldn't be able to install it. To fit the psu correctly I had to drill the plastic backplate accordingly.
Since the HP Omen Accelerator case supports gpu's with the following dimensions: 330mm(l)/140mm(w)53mm(h) I decided to go with the KFA2 RTX 283mm/139mm/41mm. The installation of the gpu itself worked like a charm.
I'm extremely happy with this build, the only thing I will change in the near future is the replacement of the standard front fan. It's okay for the moment but I think thermals might be better if I just replace the ADDA fan. The RTX 2080 Ti runs quite hot at around 75-85°C under load (eg. gaming HITMAN2) so I just want to make sure it get's enough air to breathe. Standard temperature is around 43°C.
I'm using the standard thunderbolt cable that came with the HP Omen Accelerator. I actually don't know if it's a 20GB/s or a 40GB. I was also surprised about this score but all the other benchmark scores (Superposition and FurMark) are fine.
Edit: I restarted everything, disconnected the external screen and ran the test again: 6006.15 MiB/s https://imgur.com/Mqzu9vd
I got my hands on a Thunderbolt cable from Apple (40GBits/s) and a "be quiet!" Silent Wings 3 cooler. Disassembling and removing the old fan is easy: Just unplug the three small cables from the mainboard (2x 2-pin for the internal LED lighting, 1x 4-pin for the fan) and loosen the screws. The plastic front can then be taken off. The fan ist mounted with four standard Philips screws, so no hassle to do that. If you also want to upgrade your fan in the HP Omen Accelerator, make sure the 4-pin connectors match because mine didn't. The original ADDA fan came with a very small 4-pin connector, while the be quiet! one came with a standard 4-pin connector. To install it, I had to cut the wires and solder the connector from the old fan with the wires from the new fan. I also turned the fan so that it blows cool air into the case - the psu-fan will then transport the heat out of the case. The new fan is definitely less noisier and seems more efficient than the standard ADDA fan. The base temperature is about 5°C cooler than with the ADDA fan. I didn't stress test it yet.
What is also surprising is, after the replacement of the included HP Thunderbolt 3 cable with the one from Apple, that the CUDA-Z score went up markably:
HP cable: Around 1726 MiB/s
Apple cable: Around 2655 MiB/s
The same is valid for the AIDA scores. It's a shame that HP delivers such a cable of poor quality. Anyways, I'm happy that I followed the tip from @itsage and replaced the cable.
@itsage: Yes it was the 0.5m original cable with no specific brand or imprints on it. I guess HP should've spent the 5 extra bucks for the sake of performance. On the other side: A 2080 Ti is not "normal" usecase for the Omen...