External graphics processors (external GPUs – eGPUs) are graphics processors that are not built into the computer like an iGPU (integrated GPU) or dGPU (dedicated GPU) but are located entirely inside the computer. outside the computer and connected to the computer via mPCIe connection port (wifi port on laptop), Express Card, M.2 (NGFF), thunderbolt 2, thunderbolt 3… External GPUs are designed to overcome the limitations of computers in terms of graphics processing power as well as space, temperature, and battery life (for laptops).
But will these GPUs when connected to the computer conflict with the built-in GPUs? Is it worth spending a few million, even tens of millions to upgrade to eGPUs? Or what can you expect from the performance of these discrete GPUs? Here's what you should know before investing in an eGPU, and unfortunately what you expect and reality can be quite different.
How do external GPUs work?
As mentioned, in most cases you will see an eGPU hooked up to a dock. On this dock there is a PCIe port for the graphics card and usually comes in the form of a Thunderbolt or USB-C cable to connect to your computer. Using the dock is pretty simple, like installing the card, installing the drivers, rebooting, and installing any custom software (of course, the process will vary depending on the hardware you're using). use).
Once installed successfully, your computer will automatically set graphics requests to the discrete GPU instead of using the default GPU built into the computer. In theory, this procedure should significantly improve the graphics performance of your device. As we all know, graphics processing power is not the advantage of laptops, so using separate GPUs is an effective method (of course you can use a separate GPU for your computer). desktop computers, but in fact they are much more commonly used for laptops).
By using a larger, more powerful card, your device will get better graphics performance, depending on the type of eGPU as well as your personal needs (for games or for work).
Performance will not stack
Unfortunately, using an external GPU won't give you the same performance as having the same GPU mounted internally. The question is how much performance will you lose? Estimates have placed the loss at around 10 to 15 percent. That's not a big deal, especially considering the insane performance levels of today's latest high-end graphics cards.
However, you should still be aware of this loss. For example, if you're hoping to experience the latest AAA titles on ultra-high graphics settings, a discrete GPU system connected to your laptop probably won't help you much. That's not to say that discrete GPUs won't improve your laptop's graphics performance; it certainly improves and even improves significantly, but many times it is not as impressive as you think.
Why not? Mainly because laptops are not set up to operate efficiently with that much power. And if there is, it will usually be laptops with built-in GPUs that are strong enough and do not need external GPUs (which can be found on specialized gaming laptops). Furthermore, while a PCIe port can transfer a lot of data very quickly, even the latest Thunderbolt and USB-C ports cannot keep up with that data transfer speed.
Chances are your laptop's CPU is probably not designed to handle powerful external GPUs. You can see this through the effects, which is especially true for older and slower CPUs.
Separate CPU connection docks are quite expensive
Although a discrete CPU dock is basically just a small part of the motherboard with a PCIe port and a connection wire and it costs up to a few hundred dollars or more. Some docks are also only compatible with certain laptop brands, meaning you won't be able to use them with a new laptop, which will be another expense you'll need to pay. take into account. On the back of many laptops there is no specific information about whether they can work with a specific type of discrete GPU dock. You may have to spend a little more time on this issue.
It is very important to research carefully before using
Discrete GPUs have a wide range of features and compatibility. For example:
- OWC Mercury Helios 3 will only accept cards up to 75″.
- Akitio Node has “half-length” cards.
- Alienware's Graphics Amplifier doesn't have any USB or Thunderbolt ports; instead it uses a proprietary connector.
- HP Accelerator Omen has a SATA port to connect an additional HDD or SSD.
Additionally, each discrete GPU listed above comes with specific compatibility requirements that you may or may not need to consider. As mentioned previously, the Alienware Graphics Amplifier has a proprietary connector and will only work with Alienware laptops. Razer Core's discrete GPU dock only works with Thunderbolt 3. As for ASUS ROG XG Station 2, the manufacturer does not specify which non-ASUS devices this GPU can work with.
In short, if you want to use discrete GPUs, you need to spend some time researching to make sure it is compatible with your device. The good news is that you won't have to spend much time researching on your own, there is a lot of information that you can easily find on the Internet. If you're not sure where to start your search, try visiting the eGPU section on Reddit, where there are many people who can help you.
You will get better graphics performance
Although there are many limitations, discrete graphics cards still perform their main role very well, which is to enhance the system's graphics processing capabilities. You will get better graphics performance if your laptop is connected to an external GPU, which is a no-brainer, and these GPUs will allow you to play games or run demanding applications. Requires high graphics processing capabilities, something your laptop was previously unable to do. There are many tests that have shown that discrete GPUs provide a significant amount of graphics power to devices, especially for MacBooks.
It will be difficult to say exactly how much the device's graphics processing power will increase after being connected to a discrete GPU. However, if your laptop can't run a demanding game you really want to play, upgrading to a discrete GPU is one of the most effective and feasible solutions.
Discrete GPUs will continue to improve in the future
The hardware and software of discrete GPUs will continue to improve as more and more people are interested in this expensive technology toy. One big reason is the development of games that require huge configurations, leading to an “arms race” between hardware manufacturers. In addition, hardware manufacturers also want their products to reach more customers. In short, there are many reasons that encourage them to continue improving the technology on discrete GPUs.
What is the difference between eGPU and eGFX?
When you plan to buy a new external graphics card for your laptop, you may encounter some jargon. Specifically eGPU, which the article mentioned, and eGFX.
eGFX stands for “external graphics” and means that the eGPU dock you'll be purchasing is a Thunderbolt 3 device, delivering data faster than a non-Thunderbolt 3 device, thus delivering better gaming performance . Intel's Thunderbolt 3 certification requires eGPU manufacturers to independently confirm capabilities, but seeing “eGFX support” means your external graphics card will work as it should.
The best discrete GPUs on the market today
There are a number of excellent discrete GPU lines, depending on your budget and requirements. Below are prominent names for your reference:
eGPU dock Nvidia & AMD best combo: Razer Core X
The Razer Core X is the top-rated external GPU dock on eGPU.io, and the reasons are clear. It offers enough space for both the latest GPUs from Nvidia and AMD, all of which require 3 PCIe lane space. Providing enough space for these bulky GPUs is one thing, but providing enough power is another. That's why the Razer Core X comes with a separate 650W PSU, along with support for Thunderbolt 3 to maximize performance.
You should also note that, in typical Razer style, there's a flashy Razer Core X Chroma model, which comes with a 700W PSU, additional USB ports, a Gigabit Ethernet port, and of course RGB.
Second best combined Nvidia & AMD eGPU dock: Akitio Node Titan
Akitio Node Titan builds on the successes of Akito Node Pro and comes with many advantages. The first is an additional 650W power supply for the external GPU. For those moments when you need maximum power from your external GPU, you can plug it in for optimal graphics output. The Node Titan supports GPUs up to 2.5 slots wide, meaning you won't fit an RTX 30 Series or AMD Radeon 60-series, but most GPUs before the latest generation will work fine. If in doubt, check Akitio's compatibility list.
Furthermore, while this is a great choice for an external AMD GPU solution, you can easily swap out your AMD GPU for an Nvidia card in the future.
You'll find Node Pro to be a significant upgrade over its predecessor, the standard Akitio Node Pro. Node Pro weighs 4.6kg, although not really light, you can absolutely carry it on public transport. Now, Node Titan reduces its weight to 3.5kg, making it much more compact and portable. One thing to note, however, is the overall size of the Node Titan. It is more suitable for placing on the desk at home.
The Akitio Node Titan external GPU dock has a single integrated Thunderbolt 3 port.
Do you need to use a discrete GPU?
First, clearly determine what your needs are, to play games or work. Then consider the amount of money you can invest in this device. Finally, search for information online or ask for advice from professionals. Hope you choose a suitable eGPU for yourself.
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