Lenovo Carbon X1 8th Gen + Lenovo Legion BoostStation + Nvidia RTX 2060 6 GB
 
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Lenovo Carbon X1 8th Gen + Lenovo Legion BoostStation + Nvidia RTX 2060 6 GB  

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dbltnk
(@dbltnk)
New Member
Joined: 1 month ago
 

Hi everyone,

I'm considering a new laptop build and want to go for something quiet with long battery life for mobile use and decent power for games at home. Came up with this build:

Enclosure: The Lenovo Legion BoostStation is not out yet but there is a solid spec sheet available. I intend to use it more or less like a docking station with the eGPU (plus an additional SSD for backups) under my desk and a single USB-3/TB3 cable to connect to the notebook for charging. I expect to use this with the 4k built-in display (no room for an external screen).

GPU: Nvidia Geforce RTX 2060 6 GB. Not sure yet which variant, but I assume I can fit a full-size version w/ 2 fans into the enclosure. Picked this card for it's reasonably high performance / price ratio and since it seems reasonably futureproof.

Notebook: Lenovo ThinkPad X1 Carbon Gen 8 . I don't see any builds using it yet but it seems reasonably close to the 7th Gen and all specs seem to fit - or did I overlook something crucial? This is a possible configuration:

  • Processor : Intel Core i7-10510U Processor (1.80GHz, up to 4.90GHz with Turbo Boost, 4 Cores, 8MB Cache)
  • Operating System : Windows 10
  • Memory : 16GB LPDDR3 2133MHz Onboard
  • Hard Drive : 1TB Solid State Drive, M.2 2280, PCIe-NVMe, OPAL, TLC
  • Display : 14.0" UHD(3840x2160) IPS Glare 500nits Non-Touch Narrow HDR
  • Graphic Card : Integrated Graphics
  • Camera : IR and 720p HD Camera with Microphone
  • Wireless : Intel Wi-Fi 6 AX201 2x2ax, Bluetooth Version 5.0 or above vPro
  • WWAN Selection : WWAN
  • Integrated Wireless Antenna : WLAN/WWAN Antenna
  • Integrated Mobile Broadband : Fibocom L860-GL 4G LTE CAT16
  • Near Field Communication : NFC
  • Fingerprint Reader : Fingerprint Reader
  • TPM Setting : Enabled Discrete TPM2.0
  • Absolute BIOS Selection : BIOS Absolute Enabled
  • Battery : 4 Cell Li-Polymer Internal Battery, 51Wh
  • Power Cord : 65W AC Adapter Slim (3pin)-UK (USB Type C)

What do you think? Am I going to run into any obvious issues with this setup?

Thanks in advance for the advice!

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@dbltnk, If the Lenovo Legion BoostStation becomes available soon for the estimated retail price of $249.99, it will gain market share. Otherwise it will face tough competition later this year. There are at least two other eGPU solutions with better specs coming in the second half of 2020.

 

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 13" MacBook Pro [10th,4C,G] + RTX 2080 Ti @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 2004 [build link]  


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OversizedMattress
(@oversizedmattress)
Active Member
Joined: 2 months ago
 

@dbltnk a few things to note/keep in mind:

1. EDITED - The Lenovo BoostStation has been confirmed to have dual Thunderbolt controllers. (A second controller is very helpful in preventing the USB devices - such as your external SSD - from interfering with the eGPU performance. Many users have reported lag/stutters on screen, or inconsistent USB connectivity from enclosures which only have one controller.)

2. When using an eGPU on the built-in display, the signal has to be sent back across the same Thunderbolt cable, which reduces the bandwidth you have available. For example, from my build, I lose about 10-15% performance when running a GPU benchmark on my built-in display, as opposed to on an external monitor.

3. The i7-10510U processor does not have a built-in Thunderbolt controller (i7-1065G7 has it built-in, and I believe future Tiger Lake should as well). Other sources on these forums seem to show that you may lose ~15-20% GPU performance.

Combining #2 and #3, I would expect you to get around 70% performance from your RTX 2060 (relative to it being in a desktop). For comparison, in my build with built-in Thunderbolt controller & running on external monitor, I get ~90-95% performance from my GPU.

Of course, it all comes down to usage. 70% of a 2060 is still good performance for a lot of users. And your CPU is one of the best in terms of raw performance in an ultrabook, so if you do a lot of CPU bound workloads, it's a great option.

This post was modified 1 month ago
2019 14" Lenovo Yoga C940 [10th,4C,G] + RTX 2060 Super @ 32Gbps-TB3 (Razer Core X Chroma) + Win10 [build link]  

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dbltnk
(@dbltnk)
New Member
Joined: 1 month ago
 

@itsage Thanks for the info! Would you mind pointing me at those two for comparison? 

@OversizedMattress Thanks for the thorough critique! I was aware of the performance loss from using the internal display but not at all about the benefit of the second (and third) Thunderbolt controller. I'll have a look around to see if there are any alternative builds that can satisfy those criteria. And/or wait a little bit longer until Tiger Lake / Thunderbolt 4 is out. Though judging from this Lenovo roadmap it seems like the X1 Carbon will not get that upgrade this year. Might be worth going for the T14 instead ...

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@dbltnk, They are not yet released so I can't share the full specs. 

 

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 13" MacBook Pro [10th,4C,G] + RTX 2080 Ti @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 2004 [build link]  


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MrCat
(@mrcat)
Eminent Member
Joined: 3 months ago
 

Sorry for hijacking the thread Smile

 

@itsage,

 

What do you mean with better specs? Can we expect at least the same I/O like the Lenovo Booststation with dual controllers? This could be relevant for someone looking for an enclosure right now

 

Best regards!

Dell Latitude 5290 2-in-1 (i7 8650u, 16GB LPDDR3) + Razer Core X Chroma + GTX 1070 Ti


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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@mrcat, One has dual Alpine-Ridge TB3 controllers and expansion ports including SATA port but much higher output PSU. The other has similar features but expansion ports go through a dedicated USB-B board and does not take bandwidth from Thunderbolt 3 connection at all.

@oversizedmattress We have photos of the TB3 mainboard and diagram, courtesy of @iTech.

 

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 13" MacBook Pro [10th,4C,G] + RTX 2080 Ti @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 2004 [build link]  


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MrCat
(@mrcat)
Eminent Member
Joined: 3 months ago
 

@itsage,

 

Thanks! So the one with the dedicated USB-B board would be a "2 cable solution" right? Is it the same idea like the Asus ROG XG Station 2?

Dell Latitude 5290 2-in-1 (i7 8650u, 16GB LPDDR3) + Razer Core X Chroma + GTX 1070 Ti


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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@mrcat, Yes two cables same as the XG Station 2. The projected cost of the Lenovo BoostStation is still the lowest however.

 

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 13" MacBook Pro [10th,4C,G] + RTX 2080 Ti @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 2004 [build link]  


MrCat liked
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MrCat
(@mrcat)
Eminent Member
Joined: 3 months ago
 

@itsage,

 

Thanks! So these are mostly refinements from what was released over the years:

 

- Core v2 with dual TB3 controllers and PCIe 4x slot;

- Asus ROG XG Station 2 with an extra USB-B board for peripherals.

 

If one would DIY his Core v2/Core X Chroma like @lefuturdelavenir did and/or add an USB-B board like this

he could achieve the same results or am I missing something? In case I would be right, is there anything really new, that's worth waiting for? PSUs can be changed, more I/O can be added (for Core v2/Core X Chroma owners), the USB-B board can be added as well and a custom enclosure can be made..

 

Of course, the new enclosures are plug and play so one doesn't need to worry about anything. But do they really have "new, never seen" features which are enough to consider an upgrade from an old working one?

 

Best regards!

Dell Latitude 5290 2-in-1 (i7 8650u, 16GB LPDDR3) + Razer Core X Chroma + GTX 1070 Ti


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