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Yoga 730-15IWL - Thunderbolt 3 PCIe Lanes & Specs (PCIe x2 or x4?)

2019-06-28, 4:54 AM

I'm considering purchasing the Lenovo Yoga 730-15IWL (no. 81JSCTO1WW) as it has the latest Whiskey Lake-U CPU and one Thunderbolt 3 port (TB3), which I want for eGPU expansion in the future. (This model can be customized to have a NVIDIA GTX 1050 4 GB.) However, I would like to know if anyone can confirm whether the TB3 port on the 730-15IWL supports full PCIe x4 speeds and not x2.


Ultrabook Review states that the Kaby Lake version of the Yoga 730 (730-15IKB) only supports PCIe x2 over it's lone TB3 port, but this isn't the model I'm concerned with since I like the Whiskey Lake version (730-15IWL) for its newer CPU.  MyFixGuide lists the Yoga 730 15" as having a x4 TB3 port and also matches the specs of my model of interest (i7-8565U Whiskey Lake-U and GTX 1050). This makes sense, since the i7-8550U (KBL) only supports 12 PCIe 3.0 lanes, while the i7-8565U (WHL) supports 16 lanes, and should be able to spare 4 lanes for TB3.


Some users have found the Yoga 730 15" to support only x2, but that post seems to be limited to the Kaby Lake-U model (based on the schematic). Another reply says the 730 15" can support 4 PCIe lanes. I would really appreciate confirmation that this custom Whiskey Lake-U model does in fact have full TB3 @ x4 bandwidth for optimal eGPU use.


In addition, it would be nice (but not as important as having PCIe x4) to be able to charge & plug in a TB3 peripheral. Some other forum users (1, 2) noted that the 730 15" does not support charging over the TB3 port, but perhaps that's only with the 15IKB and not the 15IWL model.



– Technicity


Here's the configuration I'm looking at:




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Re: Yoga 730-15IWL - Thunderbolt 3 PCIe Lanes & Specs (PCIe x2 or x4?)

2019-09-18, 13:02 PM

Hi Technicity

Welcome to the Community Forums!

We have checked the specifications of the Yoga 730-15IWL in PSREF: https://psref.lenovo.com/Product/Lenovo_Tablets_and_Convertibles/Yoga_73015IWL and this actually shows us that the Yoga 730-15IWL has PCIe 3.0 x4. However it does not mention that this machine is capable of charging using the TB port.

Let us know if you have any questions.


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