Do I need Dual Link DVI?

[IanDrexP]

I  have a LG Flatron L227WTG-PF 22" LCD Monitor at a resolution of 1680x1050, overclocked to 76 Hz from 60 Hz on a Single Link DVI-D. I've heard you need a Dual Link DVI to get above 60 Hz but that was at 1080p from what I researched.

 

I've run Blur Busters' Motion Tests to see if my monitor really does output above 60 Hz and it says I do. Does it really?

 

[Silverer]

Single Dvi runs 144hz @ 1080p... Might have remembered wrong but it should still run above 70 if you're on a lower resolution than 1080 nonetheless.  Check "Monitor Settings" in your video cards display settings.

[IanDrexP]

Single Dvi runs 144hz @ 1080p...

So only at higher resolutions, then you need Dual Link DVI? It doesn't affect refresh rates at supported resolutions?

[Silverer]

So only at higher resolutions, then you need Dual Link DVI? It doesn't affect refresh rates at supported resolutions?

If I remember right, could easily be wrong, havent looked at DVI stuff in years,

[TomvanWijnen]

https://en.wikipedia.org/wiki/Digital_Visual_Interface

 

This says max is 1920x1200@60Hz. Which is just a little more than 1680x1050@76Hz.

[IanDrexP]

If I remember right, could easily be wrong, havent looked at DVI stuff in years,

 

https://en.wikipedia.org/wiki/Digital_Visual_Interface

 

This says max is 1920x1200@60Hz. Which is just a little more than 1680x1050@76Hz.

I got this from another forum who got it from another forum LOL  :

 

MAXIMUM Single Link DVI speed: 3.96 Gb/s

MAXIMUM Dual Link DVI speed: 7.92 Gb/s

 

It says I can compute my speed with this formula: Vertical resolution x horizontal resolution x refresh rate x 24 bit/pixel

 

So if I apply the above, mine would be: 1680x1050x76x24 = 3,217,536,000 or 3.22 Gb/s. Which would be capable using a Single Link DVI connection from what I've researched.

[IanDrexP]

Bump, would like to get more facts about this.

[Glenwing]

Bump, would like to get more facts about this.

Single-Link DVI maxes out around 1920x1200 at 60Hz, which is equivalent to 1680x1050 at 80Hz. Single-Link DVI is not capable of 1920x1080 at 144Hz like someone stated above.

[IanDrexP]

Single-Link DVI maxes out around 1920x1200 at 60Hz, which is equivalent to 1680x1050 at 80Hz. Single-Link DVI is not capable of 1920x1080 at 144Hz like someone stated above.

 

I got this from another forum who got it from another forum LOL  :

 

MAXIMUM Single Link DVI speed: 3.96 Gb/s

MAXIMUM Dual Link DVI speed: 7.92 Gb/s

 

It says I can compute my speed with this formula: Vertical resolution x horizontal resolution x refresh rate x 24 bit/pixel

 

So if I apply the above, mine would be: 1680x1050x76x24 = 3,217,536,000 or 3.22 Gb/s. Which would be capable using a Single Link DVI connection from what I've researched.

Is that because of the computation I mentioned above? Or is that really its max refresh rate at 1680x1050 for Single Link DVI?

[Falkentyne]

You guys are wasting your own sweet time calculating BANDWIDTH.  Like...you're better off self torturing yourself with Klingon Pain Sticks.

 

SINGLE LINK DVI has a maximum PIXEL CLOCK of 165 mhz.

Dual link DVI has a maximum pixel clock of 330 MHz officially..

 

overclocking past this may be possible depending on the hardware, but usually not by much.

Depending on the quality of the cable and a bunch of other quantum things you have no control over, dual link DVI could reach up to 400 MHz pixel clock via overclocking.

 

You can use ToastyX Custom resolution utility and enter in any resolution and refresh rate and check the pixel clock limits.  Then you won't have to worry about calculating bandwidth and other things.

[IanDrexP]

You guys are wasting your own sweet time calculating BANDWIDTH.  Like...you're better off self torturing yourself with Klingon Pain Sticks.

 

SINGLE LINK DVI has a maximum PIXEL CLOCK of 165 mhz.

Dual link DVI has a maximum pixel clock of 330 MHz officially..

 

overclocking past this may be possible depending on the hardware, but usually not by much.

Depending on the quality of the cable and a bunch of other quantum things you have no control over, dual link DVI could reach up to 400 MHz pixel clock via overclocking.

 

You can use ToastyX Custom resolution utility and enter in any resolution and refresh rate and check the pixel clock limits.  Then you won't have to worry about calculating bandwidth and other things.

Would I see better performance, overclock and/or quality if I switch to Dual Link DVI?

[Falkentyne]

Pure quality?  That depends on the panel, not the refresh rate.  Dual link DVI allows higher refresh rates at higher resolutions (1920x1080@144hz, 2560x1440@120hz (this is an overclock and will require bypassing the DL DVI limits with the ToastyX AMD/Nvidia pixel clock patcher) are the limits.

 

A $10,000 60hz single link DVI panel will output better image quality than a $300 dual link 144hz panel. 

Now as far as gaming quality for fast paced motion, yes you want 120-144hz refresh rate and you need displayport or dual link DVI for that.

Ignore overclocking, please.  That's usually for those importing Korean IPS/VA 60/75hz panels and trying to overclock them.

 

There are other issues to deal with such as overdrive quality.  the Acer XB270HU has probably one of the best overdrive circuits on any 27" panel (look at TFTcentral's review for the overdrive RTA artifact rates compared to the Asus Rog Swift, and the ULMB overdrive ghosting quality

 

http://www.tftcentral.co.uk/reviews/acer_xb270hu.htm

 

Go to the response time setting comparison.  It will blow your mind.

Then go lower to the ULMB tests.  You can see the comparison between the Acer and the ROG Swift.  At 85 and 100hz ULMB, the Acer looks much nicer than the ROG.  The ROG only looks decent at 120hz.

 

You can see the response time and overshoot comparison with the ROG Swift here.

http://www.tftcentral.co.uk/reviews/asus_rog_swift_pg278q.htm

 

Granted this is getting way off topic now, but there's far more to quality than a dual link dvi port.

Dual link only allows higher refresh rates, which is important for fast paced gaming.