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How to tell if DVI dual link is being used



 
 
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  #1  
Old November 25th 19, 02:36 PM posted to alt.comp.os.windows-10
Paul[_32_]
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Posts: 11,873
Default How to tell if DVI dual link is being used

Commander Kinsey wrote:
How can I tell if my monitor is using DVI dual link or single link?

I'm interested because I will be connecting it with a longer cable and
if it uses dual link, the distance is greater without needing a booster.

I'm running Windows 10 and a Benq FP2091 monitor. Can't find this info
in the monitor specs online, or in my graphics card utility (MSI
Afterburner), or in Windows display control panel, or the utility GPU-Z.


It's a 1600x1200 monitor, so single-link DVI. They could put
a dual on it, but "links cost money", and a single-link is sufficient.

Single link = 1920x1200@60Hz CRTrb
Dual link = 2560x1600@60Hz CRTrb (Reduced Blanking, reduces the flyback period)

Paul
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  #2  
Old November 25th 19, 08:03 PM posted to alt.comp.os.windows-10
Commander Kinsey
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Posts: 1,279
Default How to tell if DVI dual link is being used

On Mon, 25 Nov 2019 13:36:29 -0000, Paul wrote:

Commander Kinsey wrote:
How can I tell if my monitor is using DVI dual link or single link?

I'm interested because I will be connecting it with a longer cable and
if it uses dual link, the distance is greater without needing a booster.

I'm running Windows 10 and a Benq FP2091 monitor. Can't find this info
in the monitor specs online, or in my graphics card utility (MSI
Afterburner), or in Windows display control panel, or the utility GPU-Z.


It's a 1600x1200 monitor, so single-link DVI. They could put
a dual on it, but "links cost money", and a single-link is sufficient.

Single link = 1920x1200@60Hz CRTrb
Dual link = 2560x1600@60Hz CRTrb (Reduced Blanking, reduces the flyback period)


The connector on the back of the monitor has contacts for the dual link, but I guess it's cheaper for them to just buy the dual link connectors and use them on all their models?

I'll just have to wait and see how good the image is over the 10m cable. Different websites have different opinions on how far you can transmit at full data frequency - anything from 5m to 15m. At 1600x1200 I'd be near full frequency. I can't turn the refresh rate down on the monitor, and I don't want to reduce the resolution, so I guess I'd have to get two 5m cables and put a booster in the middle.
  #3  
Old November 26th 19, 12:40 AM posted to alt.comp.os.windows-10
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default How to tell if DVI dual link is being used

Commander Kinsey wrote:
On Mon, 25 Nov 2019 13:36:29 -0000, Paul wrote:

Commander Kinsey wrote:
How can I tell if my monitor is using DVI dual link or single link?

I'm interested because I will be connecting it with a longer cable and
if it uses dual link, the distance is greater without needing a booster.

I'm running Windows 10 and a Benq FP2091 monitor. Can't find this info
in the monitor specs online, or in my graphics card utility (MSI
Afterburner), or in Windows display control panel, or the utility GPU-Z.


It's a 1600x1200 monitor, so single-link DVI. They could put
a dual on it, but "links cost money", and a single-link is sufficient.

Single link = 1920x1200@60Hz CRTrb
Dual link = 2560x1600@60Hz CRTrb (Reduced Blanking, reduces the
flyback period)


The connector on the back of the monitor has contacts for the dual link,
but I guess it's cheaper for them to just buy the dual link connectors
and use them on all their models?

I'll just have to wait and see how good the image is over the 10m
cable. Different websites have different opinions on how far you can
transmit at full data frequency - anything from 5m to 15m. At 1600x1200
I'd be near full frequency. I can't turn the refresh rate down on the
monitor, and I don't want to reduce the resolution, so I guess I'd have
to get two 5m cables and put a booster in the middle.


1600
---- x 165MHz = 138MHz or 1380Mbit/sec on R,G,B
1920

I'd try the cable first, before panicking.

Paul
  #4  
Old November 26th 19, 12:57 AM posted to alt.comp.os.windows-10
Commander Kinsey
external usenet poster
 
Posts: 1,279
Default How to tell if DVI dual link is being used

On Mon, 25 Nov 2019 23:40:26 -0000, Paul wrote:

Commander Kinsey wrote:
On Mon, 25 Nov 2019 13:36:29 -0000, Paul wrote:

Commander Kinsey wrote:
How can I tell if my monitor is using DVI dual link or single link?

I'm interested because I will be connecting it with a longer cable and
if it uses dual link, the distance is greater without needing a booster.

I'm running Windows 10 and a Benq FP2091 monitor. Can't find this info
in the monitor specs online, or in my graphics card utility (MSI
Afterburner), or in Windows display control panel, or the utility GPU-Z.

It's a 1600x1200 monitor, so single-link DVI. They could put
a dual on it, but "links cost money", and a single-link is sufficient.

Single link = 1920x1200@60Hz CRTrb
Dual link = 2560x1600@60Hz CRTrb (Reduced Blanking, reduces the
flyback period)


The connector on the back of the monitor has contacts for the dual link,
but I guess it's cheaper for them to just buy the dual link connectors
and use them on all their models?

I'll just have to wait and see how good the image is over the 10m
cable. Different websites have different opinions on how far you can
transmit at full data frequency - anything from 5m to 15m. At 1600x1200
I'd be near full frequency. I can't turn the refresh rate down on the
monitor, and I don't want to reduce the resolution, so I guess I'd have
to get two 5m cables and put a booster in the middle.


1600
---- x 165MHz = 138MHz or 1380Mbit/sec on R,G,B
1920


So close to the limit for single link.

I'd try the cable first, before panicking.


I wasn't panicking I was just interested. As various websites I've read say if you are at the 165MHz limit, the length of cable must not exceed:
Some say 5m
Some say 15m
One guy said he'd done 20m with a very good quality cable.
There's an amp you can buy which claims you can run a 60m cable, then use the amp at the far end to pick up the poor signal and recreate it. And then apparently use another 60m cable then another amp, ad infinitum.
 




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