Cables and adapters

Although both are the most common digital video standards and offer excellent image quality, there are key technical differences that make each one more suitable for certain uses.

• The HDMI (High-Definition Multimedia Interface) cable is the universal standard, found in televisions, game consoles, Blu-ray players, and most computers. Its main advantage is its ubiquity and ability to transmit both audio and video through a single cable . It's the perfect choice for home entertainment and most office setups.
• The DisplayPort cable , on the other hand, is a standard geared more towards high-end computers and monitors. Its main advantage is greater bandwidth in its standard versions , allowing it to support higher refresh rates at high resolutions. Furthermore, it has a unique feature called Daisy Chaining (or Multi-Stream Transport) , which allows multiple monitors to be daisy-chained to a single DisplayPort output on the computer. This makes it the preferred connection for gamers with 144Hz or higher monitors and for professionals using multi-monitor setups .

For a simple, universal connection, HDMI is perfect. For high-frequency gaming and cleaner multi-monitor setups, DisplayPort is usually the superior option. When looking for PC cables , it's crucial to choose the one that best suits your monitor and graphics card.

This is one of the most common and frustrating problems when dealing with modern video cables . The root cause is that not all USB-C ports or USB-C cables are capable of transmitting video signals . 'USB-C' refers only to the shape of the connector, not the technology inside. For the magic to happen, two requirements must be met:

1. Your computer's USB-C port must support DisplayPort Alt Mode or be a Thunderbolt 3/4 port. This is a hardware capability that allows your computer to send a video signal through the USB-C connector. Not all laptops have this feature, especially entry-level models. Compatible ports are often marked with a small lightning bolt icon (Thunderbolt) or a 'D' (DisplayPort).
2. The USB-C cable you use must be 'full bandwidth' or specifically designed for video. Many cheap USB-C cables that come with mobile phone chargers are only USB 2.0 and are designed solely for charging and low-speed data transfer. They lack the internal wiring necessary to transmit the large amount of data required for a video signal.

If you're having problems, the first thing to do is check your computer's specifications to ensure the port is compatible, and the second is to use a high-quality cable that guarantees video support.

Yes, the Ethernet cable category is very important and determines the maximum speed and reliability of your wired internet connection . Although they may all look the same on the outside, their internal construction and shielding vary significantly.

• Cat 5e: This is the oldest standard, but still very functional. It can support speeds of up to 1 Gigabit per second (1 Gbps) , which is the speed offered by most home fiber optic connections. For most homes and small offices, a Cat 5e cable is sufficient for everyday use .
• Cat 6 and Cat 6a: These represent a significant leap forward. They are constructed with a tighter twist and often an internal separator that reduces crosstalk. This allows them to reliably support speeds of up to 10 Gigabits per second (10 Gbps) over shorter (Cat 6) or longer (Cat 6a) distances. They are the recommended and future-proof option if you have an internet connection faster than 1 Gbps or if you transfer very large files within your local network (for example, to a NAS server).
• Cat 7 and Cat 8: These are very high-end categories, with much more robust shielding, designed for data center environments and speeds of 40 Gbps or more. For standard home or office use, they are overkill and will not provide a tangible performance improvement over a good Cat 6a cable.

When buying cables and adapters , choosing a Cat 6 or Cat 6a cable is the smartest decision to ensure maximum performance for your network.

Knowing how to differentiate between active and passive PC adapters is crucial to avoid compatibility problems, especially when converting between different types of video signals.

• A passive adapter is essentially a simple pin reconnector. It doesn't perform any signal conversion; it simply changes the connector's shape. It only works if the video source (your graphics card) is capable of outputting the signal in the destination's format. The most common example is DisplayPort to HDMI . Many graphics cards with DisplayPort have a feature called 'DP++' that allows them to send a native HDMI signal through that port. In this case, an inexpensive passive adapter is sufficient.
• An active adapter , on the other hand, contains a built-in converter chip that actively transforms the signal from one format to another . It is essential when the source cannot output the destination signal natively. The most common cases where you need an active adapter are:
  • When connecting more than two monitors to an AMD graphics card (Eyefinity) .
  • By converting an HDMI signal to DisplayPort (for example, to connect a PS5 to a monitor with only DisplayPort).
  • By converting a digital signal (HDMI, DVI-D) to an analog signal (VGA).

If a passive adapter doesn't work for you, you almost certainly need an active one. When looking for computer connectors in an online cable store , always check the description to see if it's active or passive.