Here's a quick summary of the connection types commonly used on monitors:
HDMI: Audio and video signal, best suited for TV to PC connections.
DVI: Video only, perfect for 144Hz at 1080p.
DisplayPort (DP): The best connector for an audio and video signal, and can transmit 144Hz up to 4K.
VGA: Old, legacy video connector. Only to be used when nothing else available.
USB Type-C: Newest audio, video, data and power connector. Commonly used on laptops and for graphics card VirtualLink connections.
So you've got the option to use 4 out of 5 of these with most decent and high end graphics cards. So which should you be using for the best results? In order;
DisplayPort (DP) - Hands down this should be option of choice for your fragging gaming monitors.
DVI - Second option if DisplayPort (DP) is not an option
HDMI - Use this if your desperate (limited to 60Hz which means 60FPS)
VGA - You need to be slapped
So what are the differences you ask ? In short;
DisplayPort (DP) - Until HDMI 2 became a standard, DisplayPort had it beat when it came to high resolutions. DisplayPort 1.2 has long been able to carry 3,840 x 2,160-resolution video at 60fps (or a refresh rate of 60Hz) and is the most common DisplayPort specification on most consumer monitors and devices now. This has 17.28Gbits/sec of bandwidth. Newer versions 1.3 and 1.4, both have a maximum data rate of 25.92 Gbits/sec, are both more widely available. With the increased bandwidth capabilities, it opens up the floodgates to higher resolutions such as 7,680 x 4,320 (8K). DisplayPort 1-1.1a is able to output 144Hz at 1080p, while 1.2-1.2a can output 1440p at 144Hz, 1.3 outputs up to 120Hz at 4K, and 1.4 can output 144Hz at 4K using Display Stream Compression (DSC). The main advantage of DisplayPort is the ability to output to multiple displays through Multi-Stream Transport (MST). You can do this by daisy-chaining compatible monitors over DisplayPort or by connecting a DisplayPort MST splitter to your single DisplayPort output on your PC or laptop. You have to work within the bandwidth limitations of whichever DisplayPort specification you’re using, such as two 1,920 x 1,080 monitors over 1.2 or two 3,840 x 2,160 displays over the DisplayPort 1.3+ specification. As such, DisplayPort is often a great choice for those looking to use multiple monitors. DisplayPort also has advantages where it comes to screen-refresh rates through AMD Adaptive-Sync/FreeSync and Nvidia G-Sync. This is what both companies have opted to use for their graphics implementation. Essentially this helps reduce screen tearing, which will be of particular interest to gamers.
- Great for gaming, use this where possible.
DVI - DVI stands for "Digital Visual Interface", and is another common connection found on PC monitors. Things can become a little confusing when you consider there are three different types of DVI. There’s DVI-A (analog signal), DVI-D (digital signal) and DVI-I (integrated analog and digital signal). Not only that, but DVI-D and DVI-I have single-link and dual-link versions. Nowadays, DVI-A is very uncommon, as it’s no better than VGA. The differences between single-link and dual-link refer to how much bandwidth the cable can carry. A single-link DVI-D or DVI-I cable can carry 3.96 Gbit/s, which tops out at 1,920 x 1,200 resolution. Dual-link, on the other hand, physically has extra pins on the connectors, allowing a maximum bandwidth of 7.92 Gbit/s and 2,560 x 1,600 resolution. Although DVI is still a common connection, it’s becoming dated, so if you want to output a very high resolution you’ll need to use HDMI or DisplayPort instead.
On the plus side, DVI-D can output a 144Hz refresh rate at 1080p. - This is what i refer to when mentioning DVI
- A Decent alternative to DisplayPort and a worthy second option for gaming
HDMI - Has seen numerous revisions since its inception in 2002. Its most common version, used in most consumer devices at present, is 1.4 but there’s a newer, more exciting 2.0 specification now becoming more prominent. The main difference between the 1.4 and 2.0 specifications focus around bandwidth available. HDMI 1.4 has a bandwidth maximum of 10.2 Gbps/s whereas the HDMI 2.0 tops out at 18 Gbps/s. Due to the limited bandwidth of HDMI 1.4, only 24fps was possible at 4K resolution (3,840 x 2,160). Now, thanks to the extra bandwidth available in the 2 specification, up to 60fps at 4K resolution is possible. This also allows you to view 144Hz at 1080p (1,920 x 1,080) through a HDMI 2 connection.
- Great for watching films, crappy for gaming.
VGA - Goes great with your Intel Celeron for Fortnite....... Please no.......
- Nothing good to say about VGA for gaming, please just dont...
Conclusion here is, DisplayPort or DVI.