HD Resolution & Analog Resolution: they display the same output

[rapstarrr91]

i have a samsung monitor that have 2 slots, specifically for DVI & VGA
and i also have a GPU embeded: inno3d GT430 that also have 2 slots for VGA and DVI

i got this new DVI cable from a friend so i tried to upgrade my display from VGA to DVI

the problem is i cant see any differences between the two

things ive checked so far:
nvidia settings ressolution tab: converted it to 1920 x 1080, 1080p
windows resolution settings: 1920 x 1080 (Recommended)

so again, there are no differences between the two when i hooked them up, can anybody tell me any steps to make my display HD?

SPECS
core i3
4gbram
gt430
OS installed: win7 32bit

 

[AddRAM]

Is it running at 1920 x 1080 ?

Why do you think you would see a difference ? VGA is analog and DVI is digital, that`s it, as far as I know.

Personally, I think Samsung monitors are terrible.

http://www.differencebetween.net/technology/difference-between-vga-and-dvi/

 

[rapstarrr91]

it is already running in 1920 x 1080 specifically in HD resolutions, i saw no difference

 

[Faladu]

It's not something you will notice under normal circumstances.

VGA is analog, DVI is digital.

If you move back 6ft or more away and compared them side to side, maybe you'd start to notice, but who does that?

This is what I found:

The VGA can go up to 2048x1536p @85 Hz and rarely 2560x1920 @63 Hz.

If true, still not much of a limit for us normal users.

But my 7950 doesn't even have that old school port, I am using 1 DVI, 1 HDMI, and 1 mini-Display Port, the Display Port is actually the best, but hasn't caught on like the rest, yet.

 

[MrNeeds]

a common misconception between ports, there is barely any difference between VGA and DVI, the reason the ports are different is because more and more computers use HDCP, you can't deliver HDCP content over VGA connections, hence the move to DVI, the computer handshakes the monitor and gives it permission to display the content if it's protected digitally.

Digital data encoding

One of the purposes of DVI stream encoding is to provide a DC-balanced output stream. A DC balanced link reduces decoding errors. This goal is achieved by using 10 bit symbols for 8 bit or less characters and using the extra bits for the DC balancing.
Like other ways of transmitting video, there are two different regions: the active region, where pixel data is sent, and the control region, where synchronization signals are sent. The active region is encoded using Transition Minimized Differential Signaling, where the control region is encoded with a fixed 8b/10b encoding. As the two schemes yield different 10 bit symbols, a receiver can fully differentiate between active and control regions.
When DVI was designed, most computer monitors were still of the Cathode ray tube type that require analog video synchronization signals. The timing of the digital synchronization signals matches the equivalent analog ones, making the process of transforming DVI to and from an analog signal a process that does not require extra (high-speed) memory, expensive at the time.
HDCP is an extra layer that transforms the 10 bit symbols before sending through the link. Only after correct authorization can the receiver undo the HDCP encryption. Control regions are not encrypted in order to let the receiver know when the active region starts.

source: http://en.wikipedia.org/wiki/Digital_Visual_Interface


You can read up about HDCP here : High-bandwidth Digital Content Protection - Wikipedia, the free encyclopedia

 

[logicearth]

MyNeeds, HDCP is not the reason for DVI or the reason for moving to DVI. The move from VGA to DVI is because it is a digital signal, it does not need to be converted to analog on the computer then converted back to digital on an LCD. Keeping it digital from the start avoids that conversion process.