The Potential of Gaming PCs: Why DisplayPort Trumps HDMI
Many gaming PCs are not reaching their full potential due to an outdated connection method – HDMI. While this may work without issue in most cases, it often fails to utilize the system's capabilities, particularly when using high refresh rates, variable refresh rates, and modern graphics cards.
DisplayPort, on the other hand, is designed specifically for PC use, offering a more stable and error-prone connection. To take full advantage of the system, it's essential to check whether using a switch is advisable and how to implement it correctly.
The main difference lies in the technical orientation of the standards. HDMI originated from the home cinema environment and was developed for televisions, AV receivers, and consoles, whereas DisplayPort has been tailored to PCs, monitors, and professional displays from the outset.
This difference is evident in its support for variable refresh rates. DisplayPort, even in older versions, supports adaptive sync technologies like AMD FreeSync and Nvidia G-Sync Compatible, whereas HDMI is limited in this respect without HDMI 2.1 and a compatible panel.
Bandwidth is another crucial factor. Many monitors combine DisplayPort 1.4 with HDMI 2.0, which limits the possible resolution or refresh rate, even if the panel and graphics card are capable of more. DisplayPort 1.4, in contrast, provides significantly more data bandwidth and allows high resolutions to be run reliably at high refresh rates with HDR enabled.
For demanding applications such as gaming, DisplayPort is usually the preferred choice due to its ability to support higher refresh rates. This makes it an ideal choice for users who want to make the most of their system's capabilities.
Quality of the cable can also be a factor, particularly for HDMI. While virtually every current DisplayPort cable supports its specified bandwidth, it's more complicated with HDMI. The full performance of HDMI 2.1 is only available with certified "Ultra High Speed" cables, which can lead to image dropouts, reduced refresh rates, or disabled features if not used.
DisplayPort is also particularly relevant for users of Linux systems or dual-boot configurations. Due to licensing restrictions, HDMI may not be fully available in these scenarios, especially when used with AMD Radeon graphics cards. In contrast, DisplayPort is an open standard and is generally fully supported under Linux, enabling more stable output, variable refresh rates, and higher resolutions.
Another practical advantage of DisplayPort is its support for monitor daisy chaining, which allows multiple screens to be connected in series, requiring only a single cable to the graphics card. This feature is particularly important in office environments for setting up multi-monitor configurations.
Displays with a DisplayPort output are required, as HDMI does not offer this capability. With HDMI, each screen requires its own connection to the graphics card, making it less convenient than DisplayPort.
DisplayPort has also become a crucial standard for modern laptops. Devices with USB-C ports compliant with the Thunderbolt or USB4 standards generally support DisplayPort Alternate Mode (DP Alt-Mode), allowing for direct connection of the monitor, often including power supply via USB Power Delivery (USB-PD).
Many modern monitors also offer USB-C inputs that process DisplayPort signals directly, eliminating the need for power adapters and simplifying the workspace. Graphics cards illustrate just how important DisplayPort has become, with most models offering several DisplayPort outputs but only a single HDMI port.
For a seamless upgrade experience, switching from HDMI to DisplayPort is more straightforward. In most cases, it's sufficient to connect the monitor with a DisplayPort cable and then check the desired resolution and refresh rate in the operating system's display settings and in the graphics card driver.
Many users only realize after making the switch that the monitor now offers higher refresh rates or that variable refresh rate can now be enabled correctly. If HDMI is already working without issues, all desired functions are available, and the monitor is running at its maximum refresh rate, there is no immediate need for action.
