Connecting a high performance graphics card to a laptop or all in one PC can already be a reality as long as your device has the necessary specifications. The appearance of the Thunderbolt 3 interface ensures data transfer speeds between PCs and peripherals far beyond what was possible with USB 3.0.
This is key to understanding the emergence of accessories such as the Razer Core and HP Omen Accelerator, which allow the installation of standalone and external video cards on laptops and computers with this type of interface and support for the BIOS-enabled feature.
HP Omen Accelerator differs from rival alternatives by one specific point: the accessory goes beyond GPU support. With Accelerator, the user can install an SSD (options are SSD of 256 GB or HD of 1 TB), have access to a Gigabit Ethernet port, four USB and one USB-C.
All these besides the possibility of installing a powerful graphic card from AMD or Nvidia: AMD's supported motherboards go to the Radeon RX 580 and on the Nvidia side, to the Geforce GTX 1070. In theory, even faster should work but the recommendation of HP to in the 1070.
On the Razer side, the approach ends up being a lot simpler: the Razer Core is a case that serves only one purpose: to house a graphics card and connect it to a notebook with Thunderbolt 3. There is no support for extra hardware in the Core plus. On the other hand, the limitations in terms of graphic card don’t exist: if the power source used in the Core supports, then the chosen board should work normally.
In practical terms, either requires the computer in question to have a Thunderbolt 3 port as a minimum requirement. It is through this interface that the PC and the external card will be connected.
But the reality of compatibility may be a bit more complex. In addition to Thunderbolt 3, the computer needs to be supported via UEFI for use with external GPUs and this may prove to be somewhat more difficult to do. In general, the compatibility of Omen Accelerator and Razer Core is in using laptops of both brands, especially those listed by HP and Razer as ideal for use with external accelerators.
The Razer Core can be found on the market, as the device was launched on the market in 2016. However, the Omen Accelerator, only goes on sale in overseas from August.
Value for Money
The HP Omen Accelerator has two considerable advantages over the Razer Core: first, it offers more advanced features with support for data storage and network connection. Second, it's a lot cheaper: HP announced the device at $ 299.
Razer Core is more feature-rich, though in theory it supports graphics cards that are faster than the limit officially supported by HP in Omen Accelerator. With no added storage and network connection, the Razer Core comes out for $ 499.
Based on the idea that you have a Thunderbolt 3 port PC that supports BIOS to external graphics cards, both Razer Core and Omen Accelerator will meet your demands in a satisfactory way.
If you can wait until August, importing the HP product sounds like a better alternative: in addition to video card support, you have access to features more advanced than those offered by Razer on Core, and get at a considerably low price.