1. Sonnet eGFX Breakaway Box

Power adapter 350 W
Weight 3.2 KG
Supported Devices All with Thunderbolt 3 port
Dimensions 21x37x25 cm

Our savings tip is perfect for you if you don’t want to use a high-end graphics card in your external GPU housing. At just under € 240, the Breakway Box is currently one of the cheapest options (there are also more wattage models). The only cheaper option is the Alienware graphics amplifier, which is only compatible with certain Alienware laptops.

Features & design

Externally, the Sonnet graphics card dock is rather inconspicuous in black and has an LED-illuminated logo on the front. Inside, the eGPU case is quite spacious and supports a wide range of graphics cards.

However, if you are looking for a compact solution for your external graphics card, then the Sonnet model is probably not your first choice. The part is the clunkiest in our comparison.

Compatibility & Connectivity

Amazingly, the external graphics dock is compatible with many graphics cards, including the hungrier GeForce cards (even some RTX 2080s run here). With Radeon cards, you have to cut back, because here is only supported up to the RX590, Vegas is no longer running smoothly.

Here, too, the connection options are limited to the only important Thunderbolt 3 port, which is understandable given the basic model’s low price.

Bottom line

Ultimately, the eGFX Breakaway Box is an excellent all-around eGPU case. Our only problem is the high prices for the 550W and 650W variants, as we cannot recommend you. Get the Gigabyte Box or the Razer Dock.

If you don’t have a big budget and are looking for an affordable option that allows you to attach a mid-range to upper-range GPU to your laptop, then the Breakaway Box is worth considering.

  • Attractively priced
  • Good compatibility
  • Good value for money
  • Quite bulky
  • No additional connections
  • Not the strongest power supply

Razer Core X

Power supply 650W
Weight 6.5 KG
Supported Devices All with Thunderbolt 3 port
Dimensions 33x6x16 cm

Our absolute price performance recommendation. At first glance, the Core X may not be reminiscent of a Razer product, as the design is actually quite simple and has no RGB bling-bling.

Dimensions & Performance

Due to the generous dimensions, even graphics cards with three times the width can be used. An RTX 2080 Ti or Radeon VII is, therefore, no problem for this external graphics card housing so if you have a bulky graphics card model in mind, ideal.

In addition, with a 650 watt power supply you can be sure that even the most power-hungry cards will have no problems.


The Razer Core X external graphics card officially supports all Razer laptops such as the Razer Blade, Razer Blade Stealth and Razer Blade Pro. Nevertheless, this external GPU is compatible with any laptop that has a Thunderbolt 3 port and supports external graphics cards.

The case itself is compatible with a variety of GeForce, Quadro and Radeon cards, all on the official product page listed.


In terms of connectivity, the Razer Core X is sparsely equipped and only has a single Thunderbolt 3 port. Therefore, there are unfortunately no additional ports that you can talk about, but they are reasonable for the price. We also want an external graphics card and not a USB hub.

All in all, the Razer Core X is a very practical external graphics card case. Mainly because it supports a wide variety of GPUs and is really cheap in this product class.

Bottom line

Unfortunately, there’s no USB hub, but if you just need an external dock for a full-size graphics card (that you don’t want to carry around with you all the time), then the Razer Core X is definitely your best home for an external graphics card.

Oh yes: The differences between the Razer Core V2 Chroma and the Core X are a lack of RGB lighting, a USB hub and a 100W weaker power supply.

  • Strong power supply
  • Very good value for money
  • Excellent compatibility (suitable for Macs!)
  • Quite heavy and bulky
  • No additional connections
  • Cable too short

Gigabyte Gaming Box RTX 2070

Power supply 450W
Weight 2.3 KG
Supported Devices All with Thunderbolt 3 port
Dimensions 21.2×9.6x, 16.2 cm

With the Gigabyte Gaming Box you get the most powerful external graphics card on the market at the moment. A compact RTX 2070 was built into this external GPU dock, so you really get a bolide here. Cooled by a specially made 130mm fan, you can definitely tackle UHD gaming with this.

Please note, however, that the performance here is by no means comparable to a desktop version of the RTX 2070. Notebook check speaks of a good 10-15% performance loss here.

Features & design

As mentioned earlier, this external GPU case comes with a Gigabyte Aorus RTX 2070.

Due to the small size and the compact cooler, the overclocking potential is of course lower and the eGPU solution also gets a bit noisy under load. Nevertheless, you can easily tackle UHD and sometimes even 4K gaming here.

There’s not much to say about the design – the exterior is minimalist, while the RGB lighting at the front gives the story that special gaming flair. With the AuraSync software from Gigabyte, the lighting can be easily controlled and adjusted with the usual RGB effects.


Ultimately, the only real problem with this external graphics card case is the form factor. Because when you upgrade or replace the GPU, you are logically restricted by the dimensions of the case . Of course, the Gigabyte RTX 2070 supplied with the box can be exchanged, but you only have space for mini-ITX graphics cards.

Here, too, your laptop or desktop must of course have a Thunderbolt 3 port and support external graphics cards.


Here you get a lot on offer. The external graphics card dock from Gigabyte has the necessary Thunderbolt 3.0 connection via which a laptop or PC can be connected.

The GPU itself has an HDMI 2.0 connection, a Display Port 1.4 connection and two Dual Link DVI-D connections.

In addition to these ports, Gigabyte goes one step further and offers four USB ports, three of which are regular USB 3.0 ports. The fourth is even a quick charge port.

Bottom line

Ultimately, this external graphics card is rather light and weighs only about 2.3 kg. In combination with the compact dimensions, this is one of the best eGPUs for on the go, which can be easily transported and conveniently placed on a desk.

Nice gimmick: Gigabyte also has a nice little carrying case that was specially developed for this case. This makes this external graphics card case really the most portable that is currently available.

  • Very light and easy to transport
  • Comes with RTX 2070 graphics card
  • Lots of connections and extras
  • Quite expensive (despite the included graphics card)
  • GPU upgrades are difficult due to its compact size
  • Not the strongest power supply

Dell Alienware Graphics Amplifier

Power supply 450W
Weight 3.5 KG
Supported Devices Alienware laptops only
Dimensions 18.5x41x17.35 cm

The Alien ware Graphics Amplifier is a GPU case specially designed for Alienware laptops that uses a proprietary port instead of the usual Thunderbolt 3 port as the connection method. This eGPU case was designed with the priority to accommodate a high-performance, full-size graphics card without worrying about compatibility.

Design & Features

The Alien ware graphics amplifier has an elegant black plastic housing with a cool look and the eye-catching Alienware logo on the front. It also has four super-fast USB 3.0 ports that can be used to conveniently connect and charge certain peripheral devices.

Unfortunately, this external graphics card case is quite bulky and therefore takes up a lot of space. This case is also delivered without a graphics card, but according to Alien ware it supports all graphics cards in their original size.


As mentioned earlier, this eGPU dock only supports Alien ware laptops. According to Dell’s list, the following laptops are supported:

  • Alien ware 13 R2 / R3
  • Alien ware 15 R2 / R3 / R4
  • (Alien ware 17 R3 / R4 / R5)
  • Alien ware X51 R3
  • Alien ware ALPHA R2

In terms of graphics cards, NVIDIA models go up to the RTX 2080 Ti, while AMD Radeon cards only go up to the RX580. For a full list, check out here .

Bottom line

Ultimately, the two biggest problems with this eGPU case are its limited compatibility and its size. So if you don’t have one of the Alien ware laptops mentioned above, you won’t be happy with this graphics card case.

Finally, the Alien ware Graphics Amplifier is a great choice for Alienware laptop owners looking to add extra power to their gaming laptop. It is absolutely incomprehensible to us that this external graphics card solution only supports Alienware laptops. Especially when you consider the low price.

  • Even cheaper than the Sonnet model
  • Many graphics cards supported
  • Lots of connections and extras, cool design
  • Only works with Alienware laptops
  • Quite bulky
  • Not the strongest power supply