MariosX, on 03 April 2012 - 19:47, said:
I've been wondering why all monitors today (including high end) still use VGA port over DVI or HDMI ports.
Is VGA superior? what are differences between VGA and DVI or HDMi?
I still prefer even flat-panels (for computer use) with all three inputs - I bought my Acer H233H.bmid for precisely that reason in 2009.
I basically use it as a *poor tech's* KVM switch, because I can connect the single display to up to three PCs - at once.
HDMI is a plus for computers for the same reason it's been a plus for home video (especially HD) - the single cable carries both audio and video. However, it has obsolesced both sound cards and integrated/onboard audio to a large extent if your display has built-in speakers, due to the PC using HDMI audio by default if connected via HDMI - even as far back as Windows XP, never mind Vista, 7, or the Developer or Consumer Previews of Windows 8 or OS X back to Snow Leopard..
The disadvantage? Not really HDMI's fault - I've noticed that HDMI - unlike DVI or VGA - doesn't display edge-to-edge, despite the same resolution being used. Because it's not applicable to all monitors, I can't blame it on the HDMI specification.
DVI has been around far longer than HDMI - even on PCs. The widely-acknowledged debut of DVI for PCs came with ATI Technologies' All-In-Wonder 8500DV supporting DVI as *standard* - you needed an included dongle to connect to CRTs (which were still the standard PC display). DVI has an even longer history on Macs - DVI was, in fact, one of two *standard* display connectors for G3 and G4 Power Macs (the other being, naturally, the AUI port).
VGA is the moldy-oldie of standard display connections for computers (it's still supported by some flat-panel displays and even some HDTVs today, in addition to HDMI and/or DVI). However, the big reason it is still supported as an *input* is when the source supports neither DVI or HDMI.
However, why are both VGA and DVI in trouble? Margins are thin on displays - and getting thinner. Including multiple inputs - let alone all the cables to connect to those inputs - was uncommon on low-end displays in 2009; in 2009, Acer was unique among sub-$200USD FP displays in supporting all three inputs *and* including the cables for them all. Most of Acer's competition has already discarded VGA/D-sub in favor of DisplayPort when they offer an input option other than DVI or HDMI - however most offer *just* DVI and HDMI in their sub-$200USD displays, and don't include both cables. (Usually, it's the HDMI cable that is missing.)