2019 15" Lenovo Yoga C940 (GTX1650) [9th,6C,H] + RTX 2070 Super @ 32Gbps-TB3 (Razer Core X Chroma) + Win10 [phila-delphia]  

@phila-delphia, Have you checked the PCH and its temps during gameplay? If it gets close to 80 degress Celsius the Thunderbolt 3 connection through here may get throttled. I found a motherboard photo on notebookcheck that shows an uncooled PCH chip.

Last but not least is the incredible insights @nando4 shared in one of his builds. He mentioned the BIOS optimization for Thunderbolt 3 connection is very lacking on H-CPU systems (except the 15" MacBook Pro). I don't know how feasible it is to produce a patch.

@itsage, Thank you for bothering to help me and thank you for the insight shared. The PCH chip indeed is uncooled - I will give it a look after I return home end of the week and see if there is something I can do about it! I will also read nando4s article!

Thx again for yout help! I will report back!

All the best!

phil

@itsage, I had chance to check the PCH temperature. It will hover at 57-61°C when the TB3 is under gaming load... So that`s not the issue. I suspect the bad 9750h Bios nando mentioned in his build. Still I thank you very much!

All the best!

phil

@phila-delphia I've been considering using the Core X Chroma for a one-plug solution with a Lenovo laptop, but I've heard mixed reviews on its functionality with USB peripherals. Personally I would probably only use keyboard/mouse/mic, but it looks like you're pushing it to the limit. How has your experience been, and could you describe your peripheral setup?

@oversizedmattress, Pushing it to the limit is right... The limit was reached, when I attached an USB splitter to one of the Chromas USB Ports 😉

Right now I use the Chroma with

- Mouse (wireless dongle)

- Keyboard (wireless dongle) -> both of which must not be plugged into one USB port (via said splitter) to avoid interference.

- 1 TB SSD

- 1 RAID ENCLOSURE

- LAN

- HDMI -> LED Beamer

- DP -> Monitor

Everything works like a charm (besides the fact that the 8th/9th gen BIOS issue nando observed and described somewhat hampers gaming performance)

All the best to you!

phila

@phila-delphia Whelp, that seals the deal for me then, that’s incredible! All I need to hope for is half that level of connectivity and I’ll be set

Ps. You probably already know this, but from what I’ve heard hooking up that many peripherals (especially the storage) via the Chroma can take up a lot of your Thunderbolt bandwidth. Have you tried running performance tests with less attached?

@oversizedmattress, yes I did test the performance but the effect is neglectable imho as long as you do not try to run mous and keyboard dongle OR 2 ssd through one Croma USB port like I did

Saying this I have to damit, that I am not the kind of guy that copys millions of lifes while downloading hundreds of GB plus trying to game at the same time...

What hampers performance most are:

- the limitations that I described here ->  https://egpu.io/forums/postid/74218/ (apparently due to 8th/9th gon BIOS)

- the bandwidth limitations TB3 suffers from small block transfer sizes (application dependand)

Both is covered in this exelent thread @nando posted some time ago: https://egpu.io/forums/postid/72088/

Hope all will work out well for you!

All the best!

phila

Posted by: @phila-delphia

- the bandwidth limitations TB3 suffers from small block transfer sizes (application dependand)

This may be illustrated by the benchmarks from @itsage comparing Thunderbolt to PCIe.
https://egpu.io/forums/thunderbolt-enclosures/a-call-for-measurements-isolating-the-thunderbolt-effect/paged/5/#post-14987
Note how PCIe 3.0 x1 can have performance better than Thunderbolt 3.