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Sonnet eGFX Breakaway Box, Thunderbolt 3-to eGPU PCIe Card Expansion System (GPU-350W-TB3Z)

4.1 4.1 out of 5 stars 124 ratings

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Graphics Coprocessor geforce gtx
Brand SoNNeT
GPU Clock Speed 2750 MHz
Graphics Processor Manufacturer AMD
Compatible Devices Laptop, Desktop

About this item

  • Connects High Performance GPU Cards to computers with a Thunderbolt 3 port. Also supports AVID HDX, Red Rocket-X and other full-length x16 PCIe cards.
  • 350W power supply supports up to 300W card (up to 8-pin + 6-pin power connectors) and provides up to 15W of Power Delivery to charge a laptop.
  • Breakaway Box has one Thunderbolt 3 port and includes a 0.5m 40Gb Thunderbolt 3 cable
  • Mac: Supports AMD Radeon RX 470,480,570,580 on Thunderbolt 3 Macs with macOS High Sierra (Boot Camp not supported). macOS supports two Breakaway Boxes.
  • Windows: Supports NVIDIA GeForce GTX 1060,1070/Titan X, Xp,V/Quadro P4000,P5000 or AMD Radeon RX 560,570,580/WX 5100,7100 on Thunderbolt 3 computers with Windows 10.
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Product Description

Connect a High-Performance Graphics Card or Other Bandwidth-Hungry PCIe Card to a Thunderbolt 3 Equipped Computer

Sonnet’s eGFX Breakaway Box, a Thunderbolt 3 to PCIe card expansion solution, supports any Thunderbolt compatible PCIe card, but is designed specifically for bandwidth-intensive graphic video cards. The Breakaway Box enables all the popular GPU cards that support connecting to a computer over Thunderbolt such as AMD Radeon R9 and RX and NVIDIA GeForce GTX7, 9 and 10 series, providing GPU support for computationally-intensive applications and games.

Sonnet has compiled a partial list of computers compatible with external graphics cards.  ASUS, Razer, and Intel report their compatible computers. Sonnet has compiled a list of compatible computers on our page.  These computers have either been Sonnet tested or user reported.  If a listed computer has an optional discrete NVIDIA GPU, then it may not currently be compatible with external NVIDIA GTX graphics, even if the model is listed as compatible (these models should be compatible with AMD cards).  Please check specification sheet.

Graphic Intensive Gaming

There’s no need to carry a heavy and expensive gaming laptop to have a great gaming experience—just plug in a Breakaway Box and add the GPU power you want when you need it! By delivering much higher frame rates for smooth game play, the Breakaway Box is ideal for enabling graphic-intensive gaming on computers (such as thin/light notebooks) that otherwise would not be able to produce an acceptable gaming experience. When used with computers that properly support eGPUs, accelerated graphics can either be displayed on your notebook’s own display panel or on external monitors. And, unlike with gaming laptops, when the next generation of GPUs rolls around and you are ready for another performance boost, simply upgrade the GPU card—nobody should have to replace their computer just to keep up with the latest in GPU technology.

Ready for Work, Coolest & Quietest eGFX Graphics Card Box on the Market

The Sonnet eGFX Breakaway Box is the coolest and quietest eGFX box on the market—with its large variable-speed, temperature-controlled fan that quietly and effectively cools the installed card, the Breakaway Box can be comfortably used in noise-sensitive working environments

40Gbps Thunderbolt 3 Performance

Thunderbolt 3 is a leap forward in every way. Whether you’re editing 4K video at high frame rates or blasting aliens out of the sky, you can now transform your notebook into a true desktop experience. With up to 2750 MB/s available bandwidth, the Breakaway Box exploits its 40Gbps Thunderbolt 3 interface to offer the best-possible eGPU experience, or handle the most demanding, highest performance PCIe cards.

Product information

Technical Details

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Additional Information

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

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Sonnet eGFX Breakaway Box, Thunderbolt 3-to eGPU PCIe Card Expansion System (GPU-350W-TB3Z)


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Customer reviews

4.1 out of 5 stars
4.1 out of 5
124 global ratings

Customers say

Customers like the performance, quality and ease of setup of the video card. For example, they mention it works well with different computers and operating systems, is quiet and has a simple to follow shell script. That said, some complain about the size and power. Opinions are mixed on value.

AI-generated from the text of customer reviews

32 customers mention23 positive9 negative

Customers like the performance of the video card. They say it works well with their computers and is plug and play. Some mention that it works flawlessly with a GTX 1080 and that it runs smoothly on Linux. Some say the built-in power supply has worked well, and that the product is durable.

"...It works flawlessly with a GTX 1080 and the same headset. Note the GTX Titan X wasn't listed as supported, but did still work...." Read more

"...Works like a charm and gives me much more power for when I'm at home...." Read more

"...I'm going to be keeping it, once I worked out the MacOS issues it works great. It will get better when 10.13.4 comes out of beta." Read more

"...Pascal nVidia cards won't work under High Sierra...." Read more

18 customers mention18 positive0 negative

Customers are satisfied with the quality of the video card. They mention it's a very good product, with top-notch engineering. Some say that the device is well-designed and a solid great solution.

"...Sonnet's engineering is top notch...." Read more

"Product is well made and very quite! I consider it one of the best products on the market...." Read more

"...When it works, it's wonderful. The promise of desktop level graphics power with the mobility of a laptop sounds great on paper...." Read more

"...Conceptually the idea is really cool.. The performance (when it worked) was good. The fact that It supplies PD is awesome...." Read more

17 customers mention15 positive2 negative

Customers find the setup of the graphics card to be easy. They mention that it works great using a simple to follow shell script. Some say that it's plug and play for Mac OS X Mojave.

"...The enclosure is very easy to open up and install the graphics card and is quick to get working once drivers are downloaded...." Read more

"...Pros:Easy setupFits large GPU'sWhisper quiet. Have yet to hear the fan even under load...." Read more

"...I couldn't believe how easy this was to install on Windows 10 (Bootcamp on the Mac, native on the Dell)...." Read more

"Does what it's supposed to do. Setup was relatively easy..." Read more

15 customers mention11 positive4 negative

Customers like the noise level of the video card. They mention it's very quiet and has no fan noise problem.

"...It runs fairly quiet (Laptop fan is louder when under load) but it's not super annoying or anything...." Read more

"...Pros:Easy setupFits large GPU'sWhisper quiet. Have yet to hear the fan even under load...." Read more

"...Rated 5 starts for noise level, it is very quiet. Rated 5 stars for value, you cannot beat $200 for this box...." Read more

"...I did find that my MacBook's internal fans did not scream like they normally do when I game.. instead the GPU's fans in the eGPU enclosure were going..." Read more

5 customers mention5 positive0 negative

Customers are impressed with the speed of the video card. They say it works fast, has very low latency, and is thunderbolt amazingly fast. Customers also mention that it's quick to get working once the drivers are downloaded. Overall, customers are satisfied with the performance of the product.

"...is very easy to open up and install the graphics card and is quick to get working once drivers are downloaded...." Read more

"...While the performance is quite good (3-4x the internal GPU), there are some technical issues that anyone buying this needs to be aware of...." Read more

"...The box is about the size of a shoebox, well designed, instantly on when NUC is started, thunderbolt amazingly fast and is super duper quiet." Read more

"...I sent code out using OpenCL and processed it on the card. Very low latency...." Read more

8 customers mention3 positive5 negative

Customers are mixed about the value of the video card. Some mention it's great value for the price, while others say the price is a little expensive.

"...Wish the price was cheaper, power supply documentation was more clear and I will expand on this...." Read more

"This is an amazing product at a terrific deal. I have a mid-2015 MacBook Pro and I game from Windows 10 via Bootcamp...." Read more

"...In the end we just gave up and returned it because it was so expensive for something that only works with thunderbolt." Read more

"...Although this product is a bit expensive for what it is, I highly recommend it. It has greatly improved my gaming and editing experiences." Read more

11 customers mention0 positive11 negative

Customers are dissatisfied with the size of the video card. They mention that the 1 ft long cable is too short, and the panel that faces the GPUs is only enough for shorter sized GPUs. They also say the TB3 cable is a bit short and the USB-C cable is also a little short. Customers also mention that it's larger than their Mac Pro and difficult to find.

"...The included Thunderbolt 3 cable is WAY to short. You'll need to buy a longer one, but check the bandwith on a longer TB3 cable before you buy...." Read more

"...Thunderbolt 3 cable included.Cons:Large - It is larger than my Mac Pro and difficult to find a good spot on the desk, especially..." Read more

"...3 cables of various lengths and they all have these extremely long connector heads, that pretty much act as levers inviting the world to apply..." Read more

"...Provided TB3 cable is a bit short, but seems like it is good quality.Very well priced compared to competitors...." Read more

8 customers mention2 positive6 negative

Customers are dissatisfied with the power of the video card. They mention that it lacks the power needed to charge their laptop, and that it's unable to stay on or keep charge. Some say that the power supply only charges at 60W, and the battery keeps getting lower and lower.

"...My only complaint is that it lacks the power needed to charge my laptop..." Read more

"...Attached screenshot of my MacBook's battery, this IS NOT powerful enough to charge the battery, it is only 60W. I left my MacBook last night running..." Read more

"...However, it runs very quietly, only sucks down power when youre using graphics intensive and was simple to instal. Buy one." Read more

"...Bootup is a pain. The box will go to sleep if disconnected and apparently cannot be woken up by the MacBook. so startup is as follows:1...." Read more

Okay box. 60W is not enough for 2017 MacBook Pro 13"
3 Stars
Okay box. 60W is not enough for 2017 MacBook Pro 13"
*Update*Attached screenshot of my MacBook's battery, this IS NOT powerful enough to charge the battery, it is only 60W. I left my MacBook last night running a small task and I came back today where I find the battery at 4%. I then watched it go down to 3% then 2%. You will need to have an external charger hooked up.I have had this for 24 hours so far and used it with my 2017 MacBook Pro 13" w/ Touchbar and Late 2013 Mac Pro. Using XFX AMD RX 580 8GB Black Core Edition GPU.Pros:Easy setupFits large GPU'sWhisper quiet. Have yet to hear the fan even under load. Rendered a 3D object into some footage and didn't hear it at all.Thunderbolt 3 cable included.Cons:Large - It is larger than my Mac Pro and difficult to find a good spot on the desk, especially with the short cableOnly charges at 60w. No MacBook Pro is that low for charging wattage. Mine is 69w. So while using it, you can rely on it effectively charging your laptop.Really short Thunderbolt 3 CableZero documentation about MacOS High Sierra on Sonnets website.Other thoughts and/or things to know.This is not Sonnet's issue but with MacOS High Sierra 10.13.3 the eGPU is recognized however it doesn't show in the About Mac window. Under System Report under PCI it is seen.Even though recognized, the full GPU memory isn't shown or used in Adobe Premiere or Adobe After Effects. As for After Effects, the card isn't recognized in the preferences under preview/ GPU Information.With 10.13.4 Beta 5, things are better. You have to use a monitor via HDMI or DisplayPort on the back of the card for the card to be used the way intended, the full benefit, especially for Premiere Pro and After Effects. I put my MacBook Pro on the beta and now able to have full memory for video editing and games.I'm going to be keeping it, once I worked out the MacOS issues it works great. It will get better when 10.13.4 comes out of beta.
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Reviewed in the United States on January 25, 2018
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Top reviews from other countries

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loeb
5.0 out of 5 stars barebonne pour mac
Reviewed in France on May 13, 2019
2 people found this helpful
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fabio fumarola
5.0 out of 5 stars Ottimo. Gtx 1080 con Dell xps
Reviewed in Italy on February 2, 2018
9 people found this helpful
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PaulHu416
5.0 out of 5 stars Quiet, Stable and Utilitarian thunderbolt 3 eGFX
Reviewed in the United Kingdom on November 13, 2017
6 people found this helpful
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JDM
5.0 out of 5 stars Super aber nur für Profis
Reviewed in Germany on January 13, 2018
9 people found this helpful
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zdlzdlxs
5.0 out of 5 stars Good
Reviewed in the United Kingdom on September 9, 2019