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Kyletizboss

Can a dual link DVI handle 1440p 120hz

Dual Link DVI can do as much as it can fit in 9.9 gbit/s with 8:10 encoding , meaning only 80% can actually be used for data. So in essence, you have 7.92 gbit per second for your data. or 7920 megabit per second or (since we have 8 bits in a byte)  990 MB/s

 

1440p is 2560x1440 pixels, so using 3 bytes per pixel (red, green,blue) you're looking at 2560x1440x3 = 11,059,200 bytes or 10800 KB or 10.54 MB/s

 

So how many times can we send 10.54 MB in a second when the maximum possible is 990 MB in a second?  Simple, 990 / 10.54 = 93.92 fps.

 

So according to our math, 93 fps would be the theoretical limit but there's some data besides the raw pixels sent on the cable when talking to the display processor in the monitor, so let's just round it down to be safe and say 90 fps may be duable, but I would be more comfortable saying 85 fps.

 

 

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Posted · Original PosterOP
4 minutes ago, Kyletizboss said:

I know that a dual link dvi can do 1440p but can it do 120hz at the same time? Ive looked around but can't find the answer anywhere.

 

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Posted · Original PosterOP
4 minutes ago, Kyletizboss said:

I know that a dual link dvi can do 1440p but can it do 120hz at the same time? Ive looked around but can't find the answer anywhere.

 

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Posted · Best Answer

Dual Link DVI can do as much as it can fit in 9.9 gbit/s with 8:10 encoding , meaning only 80% can actually be used for data. So in essence, you have 7.92 gbit per second for your data. or 7920 megabit per second or (since we have 8 bits in a byte)  990 MB/s

 

1440p is 2560x1440 pixels, so using 3 bytes per pixel (red, green,blue) you're looking at 2560x1440x3 = 11,059,200 bytes or 10800 KB or 10.54 MB/s

 

So how many times can we send 10.54 MB in a second when the maximum possible is 990 MB in a second?  Simple, 990 / 10.54 = 93.92 fps.

 

So according to our math, 93 fps would be the theoretical limit but there's some data besides the raw pixels sent on the cable when talking to the display processor in the monitor, so let's just round it down to be safe and say 90 fps may be duable, but I would be more comfortable saying 85 fps.

 

 

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Posted · Original PosterOP
Just now, mariushm said:

Dual Link DVI can do as much as it can fit in 9.9 gbit/s with 8:10 encoding , meaning only 80% can actually be used for data. So in essence, you have 7.92 gbit per second for your data. or 7920 megabit per second or (since we have 8 bits in a byte)  990 MB/s

 

1440p is 2560x1440 pixels, so using 3 bytes per pixel (red, green,blue) you're looking at 2560x1440x3 = 11,059,200 bytes or 10800 KB or 10.54 MB/s

 

So how many times can we send 10.54 MB in a second when the maximum possible is 990 MB in a second?  Simple, 990 / 10.54 = 93.92 fps.

 

So according to our math, 93 fps would be the theoretical limit but there's some data besides the raw pixels sent on the cable when talking to the display processor in the monitor, so let's just round it down to be safe and say 90 fps may be duable, but I would be more comfortable saying 85 fps.

 

 

OK thank a lot for doing all that math for me. I am getting a 1440p 60hz moniter and it only has dvi dual link but I am planing to OC it to go a little higher.

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7 hours ago, Kyletizboss said:

I know that a dual link dvi can do 1440p but can it do 120hz at the same time? Ive looked around but can't find the answer anywhere.

It's out of spec (official max is around 80-85 Hz at 1440p) but you can force it beyond the official max with utilities. How far above you can go depends on the hardware, the graphics card side can do pretty much anything, it just depends on the monitor's DVI controller. There are plenty of people who have run 1440p at 120 Hz over DVI on those off-brand Korean monitors.

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