eGPU Benchmark Question

[colinmckeown249]

Does anyone know where I can find comprehensive benchmarks for RTX cards in eGPU enclosures? I just received my Blade Stealth and am trying to decide what GPU to get for my Core X Chroma (I didn't choose the laptop, it's just a coincidence they're both Razer) so that I can use my 1440p 144hz monitor well, ideally high to ultra settings at 100+ frames like I could get on my desktop before I had to sell it before going to college.

[Mira Yurizaki]

There's an article showing the RTX 2080 Ti on a variety of PCIe lanes and speeds at https://www.techpowerup.com/reviews/NVIDIA/GeForce_RTX_2080_Ti_PCI-Express_Scaling/ . You only need the PCIe 3.0 x4 benchmarks to get an idea how an eGPU will perform at best.

[colinmckeown249]

8 minutes ago, Mira Yurizaki said:

There's an article showing the RTX 2080 Ti on a variety of PCIe lanes and speeds at https://www.techpowerup.com/reviews/NVIDIA/GeForce_RTX_2080_Ti_PCI-Express_Scaling/ . You only need the PCIe 3.0 x4 benchmarks to get an idea how an eGPU will perform at best.

Thank you so much, I hadn't thought of that. Would there be any further performance decrease from TB3 on the Core X Chroma or do the PCIe lanes connect directly to the CPU?

[colinmckeown249]

For example, in a lot of posts I've seen, they claim a 20% reduction in performance when using an eGPU but I hadn't found too many benchmarks to support or disprove this.

[Mira Yurizaki]

19 minutes ago, colinmckeown249 said:

Thank you so much, I hadn't thought of that. Would there be any further performance decrease from TB3 on the Core X Chroma or do the PCIe lanes connect directly to the CPU?

They have one for the GTX 1080: https://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_1080_PCI_Express_Scaling/

 

Note this is for Intel systems. Also note that if you have an NMVe drive connected via chipset actively being accessed by the CPU, it may affect results.