regular USB C Extension cable (3.3ft/1m) works at 10Gbps-TB1 speed on TB3 system
 
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regular USB C Extension cable (3.3ft/1m) works at 10Gbps-TB1 speed on TB3 system  

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ha1o2surfer
(@se12897)
Trusted Member
Joined: 3 years ago
 

I have been using a caldigit 2m TB3 cable for most of my games and it works fine for the games I run. I don't care if I can't get 70fps, as long as I can get 60fps then it really doesn't matter to me if the cable doesn't have enough bandwidth for an FPS that's above my refresh rate.. doesn't make sense. Anyways, I grabbed a 3 foot USB c extension from my bag and to my surprise it works great. Well.. it works but I get under a GB/s for H2D but overwatch doesn't care at all. At ultra, I get 60fps even via my internal screen with this cheapo extension cable. 

Just wanted to let everyone know Smile

For reference. 

I have a 1070 with an HP 13".
Sonnet Breakaway 550
Cable Link: USB C Extension

2018 13" HP Spectre X360 [8th,4C,U] + GTX 1070 @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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ha1o2surfer
(@se12897)
Trusted Member
Joined: 3 years ago
 

Benchmark Numbers: Heaven at max settings 1080

Caldigit:                                     60.7FPS Optimus - 72.1 External - 1.5GB/s H2D 1.6GB/s D2H
Caldigit + Extension:                 49.7FPS Optimus - 72.3 External - 867MB/s H2D - 865MB/s D2H
Sonnet Cable:                            67.5FPS Optimus - 75.2 External - 2.6GB/s H2D 2.8GB/s D2H
Sonnet Cable + Extension:          NA - NA - NA (Didn't work)

 Just played a couple games of Overwatch after I posted this. Hasn't crashed... success!!

2018 13" HP Spectre X360 [8th,4C,U] + GTX 1070 @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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

I'm very surprised it worked. We can think of USB-C extension as 10Gbps TB3 cable then. LoL

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

 
2020 13" MacBook Pro [10th,4C,G] + RX 5700 @ 32Gbps-TB3 (Prototype eGPU Enclosure) + macOS 10.15.4 & Win10 1903 [build link]  


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ha1o2surfer
(@se12897)
Trusted Member
Joined: 3 years ago
 
caldigit+extension

The speeds seem to fluctuate based on how much power the laptop draws? When my laptop is charging it can drop down to 600MB/s and then when it's fully charged, it'll jump back up to 820MB/s ish. Weird but It's 100% stable so this is a good solution for people looking for better docking performance with more monitors and not looking to game. This reduced bandwidth doesn't affect adobe premiere either. I have another version of an extension cable that I also want to try.

Overwatch in optimus mode still runs at 60FPS no problem. I see the usage around 30% in GPUz versus 15% using the caldigit cable. Make sense

Another observation. The extension has to be attached to the computer side. If it's attached to the TB3 endpoint, it charges but doesn't connect. 

2018 13" HP Spectre X360 [8th,4C,U] + GTX 1070 @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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Username
(@username)
Reputable Member
Joined: 3 years ago
 

Pretty cool discovery.

Present: 2012 Mac mini + PowerColor RX 56 Vega Nano @10Gbps-TB1 + PowerColor Mini eGFX 180F via Apple TB3 to TB2 + macOS Catalina 10.15.4

Previous: 2012 Mac Mini + GTX1070 @ 10Gbps-TB1 (AKiTiO Thunder3 via Apple TB3 to TB2 adapter) + macOS

 
2012 Mac Mini [3rd,4C,Q] + GTX 970 @ 10Gbps-TB1>TB3 (AKiTiO Node) + macOS 10.12.4 [build link]  


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(@miah_adib)
Active Member
Joined: 2 months ago
 

@se12897, wait are u saying that we can use Usb -c (NO TB3) with the egpu and have the graphics card working

 

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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joevt
(@joevt)
Noble Member
Joined: 3 years ago
 

@miah_adib, No, he's saying you can use a USB-C cable instead of a Thunderbolt cable, but your computer needs a Thunderbolt controller to use an eGPU. The USB-C cable will be slower than a Thunderbolt cable.

 

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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(@miah_adib)
Active Member
Joined: 2 months ago
 

@se12897, so with the same setup if I use the tb3 cable that came with the egpu and plug in to laptop which has USB-C 3.1 will I be able to play games at ultra with 60 fps?

 

 

 

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
 

@miah_adib, Please stop posting the same question about your USB-C only laptop. It will not work with a Thunderbolt 3 eGPU.

You may be able to use an M.2 eGPU adapter such as the ADT-Link R43SG

 

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

 
2020 13" MacBook Pro [10th,4C,G] + RX 5700 @ 32Gbps-TB3 (Prototype eGPU Enclosure) + macOS 10.15.4 & Win10 1903 [build link]  


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