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Yamakasi Catleap Q270 (100hz guaranteed). - Page 98  

Poll Results: Would you be interested in buying a Yamakasi Catleap Q270 (100hz guarenteed)

 
  • 87% (726)
    Yes
  • 2% (18)
    No
  • 10% (88)
    Maybe
832 Total Votes  
post #971 of 1131
Well. I really hope this deal goes through then. And hope to hear a more recent update on it, like most of you - who have been waiting around longer than me.

I just came across this monitor the day before yesterday (au time) and have been fascinated ever since. I checked out the youtube videos by Theologist and continued to be impressed. I think 60+% of people in my position would dismiss it because they paid so much for their Dell u3011's and u2711's. Rather than be insulted - I would rather have a 2560x1440 monitor that is also capable of above 60hz all the way up to a possible 100-120hz.

I'm not entirely sure what a reduced color gamut actually translates to in gaming. Does it mean that just cause 2 will be less vibrant?

Regardless, consider me sold. Assuming I can get it shipped to AU, and at a price not too far beyond what they go for on ebay.

Step1: Sell 6990
Step1: Hope that stock has come in for the gtx 680 and I can get it for approx 600AU. (Yes, they charge us an additional 200, yes that is unfair). And pick one up.
Step3: Hope that the deal has cleared for Overclock users and order.
Step4: Patiently wait, with a slight fear that something might be amiss.
Step5: Combine Gtx 680 + Yamakasi Catleap Q270 for "hopefully" magic results
Step6: Play skyrim without microstutter for the first time.
Step7: Never purchase a AMD duel gpu card again.
post #972 of 1131
Quote:
Originally Posted by DrSmoke View Post

@Ken.
The bandwidth "bottleneck" some are referring to on DVI is being misunderstood. They are taking the limit of the single link DVI and doubling it, and saying that a Dual-link DVI does not have the bandwidth to carry a 1440p @ 120hz single. This is simply not true. There is no such limit for DL-DVI.
Obviously there is *some* limit to what a DL-DVI can carry, but you don't find it by simply multiplying the single link limit.
TL;DR - Yes, a DL- DVI cable can cary 1440p @120 hz.

But your video card most likely cannot. The TMDS clock signal is not unlimited, and in the design phase, you must specify a maximum to design for or else you will overdesign by a significant amount. The TMDS clocks on video cards are likely designed for 330mhz (2x SL-DVI max) for simplicity, with additional overhead to ensure operations and yield at that level.

It's my belief that we are "overclocking" the TMDS transmitters once we get beyond 330 mhz; all single link implementations must be able to output a 165mhz signal. When going to dual link, the frequency per link is halved, and thus each link is now doing exactly half of the work. Thus, if the pixel clock is 200mhz, the first link is now only doing 100 mhz and the second is 100 mhz. There is no real incentive to design for more than 165 mhz per link, since the minimum specified for a single link is 165 mhz. Of course, there is overhead buffer...
Quote:
On the subject of modding a Dell, not likely. Even if you could, there would still be all the crap dell puts into their panel, that would result in the typical input lag people talk about with IPS monitors.
Part of the reason these are so great is the lack of multiple inputs and other "extras".

Lack of multiple inputs is not a good thing frown.gif I want my displayport! Supplementing the 1366x768 with a screen that is taller than my laptop is wide would be a godsend for CAD work.
Edited by kevinsbane - 4/16/12 at 5:41am
post #973 of 1131



 

Quote:
Originally Posted by DrSmoke View Post

@Ken.

The bandwidth "bottleneck" some are referring to on DVI is being misunderstood. They are taking the limit of the single link DVI and doubling it, and saying that a Dual-link DVI does not have the bandwidth to carry a 1440p @ 120hz single. This is simply not true. There is no such limit for DL-DVI.

Obviously there is *some* limit to what a DL-DVI can carry, but you don't find it by simply multiplying the single link limit.

TL;DR - Yes, a DL- DVI cable can cary 1440p @120 hz.


On the subject of modding a Dell, not likely. Even if you could, there would still be all the crap dell puts into their panel, that would result in the typical input lag people talk about with IPS monitors.

Part of the reason these are so great is the lack of multiple inputs and other "extras".


Thanks for the positive response.

 

Don't take me wrong, I really want 2560x1440 @120Hz. This is something that I don't have and new stuff I want. I know some modification has to be done by user because none of the 'Certified 120Hz @2560x1440' available for purchase yet.

 

I have been playing with some monitor with HDMI and 30" 1600 by forcing EDID in the inf. It will only work if I lower the resolution and raise the refresh rate to stay within the bandwidth limit or supported by the monitor or I will get "Incompatible Signal" once the games load.

 

And I don't know if those who can make 2560x1440 @133Hz if the monitor is actually receiving 133Hz signal or just 60Hz then refreshes it to 133Hz as in some LCD HDTV.

 

I wish later someone would be kind enough to explain it more in depth as how it works with Microsoft WDDM and DirectX etc. Or how to make it works also about the DVI-DL bandwidth limitation.

 

 

Quote:

The TMDS clock signal is not unlimited, and in the design phase, you must specify a maximum to design for or else you will overdesign by a significant amount. The TMDS clocks on video cards are likely designed for 330mhz (2x SL-DVI max) for simplicity, with additional overhead to ensure operations and yield at that level.
 

 

This is also my understanding of the DVI-DL bandwitdh 9.9 Gbit (330 MHz).

 

2560x1440 @120Hz 24 bit = 15.75 Gbit w/overhead (442.37 MHz) is way beyond DVI-DL can carry.


Edited by Ken1649 - 4/16/12 at 6:17am
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post #974 of 1131
Quote:
Originally Posted by Ken1649 View Post




 


Thanks for the positive response.

Don't take me wrong, I really want 2560x1440 @120Hz. This is something that I don't have and new stuff I want. I know some modification has to be done by user because none of the 'Certified 120Hz @2560x1440' available for purchase yet.

I have been playing with some monitor with HDMI and 30" 1600 by forcing EDID in the inf. It will only work if I lower the resolution and raise the refresh rate to stay within the bandwidth limit or supported by the monitor or I will get "Incompatible Signal" once the games load.

And I don't know if those who can make 2560x1440 @133Hz if the monitor is actually receiving 133Hz signal or just 60Hz then refreshes it to 133Hz as in some LCD HDTV.

I wish later someone would be kind enough to explain it more in depth as how it works with Microsoft WDDM and DirectX etc. Or how to make it works also about the DVI-DL bandwidth limitation.



This is also my understanding of the DVI-DL bandwitdh 9.9 Gbit (330 MHz).

2560x1440 @120Hz 24 bit = 15.75 Gbit w/overhead (442.37 MHz) is way beyond DVI-DL can carry.

DisplayPort is such a nice thing. DP handles 17.28 Gbit/s... By what you are saying it seems DP would be required on these monitors.
post #975 of 1131
Quote:
Originally Posted by Ken1649 View Post


This is also my understanding of the DVI-DL bandwitdh 9.9 Gbit (330 MHz).

2560x1440 @120Hz 24 bit = 15.75 Gbit w/overhead (442.37 MHz) is way beyond DVI-DL can carry.

330MHz is not the limit of what DL-DVI is capable of. 330MHz is what DL-DVI must be garunteed to carry. Anything beyond that is dependent solely on your video card manufacturer's implementation of their TMDS signal and the quality of your DL-DVI cable. 330MHz is only the minimum.
post #976 of 1131
Quote:
Originally Posted by kevinsbane View Post

Quote:
Originally Posted by Ken1649 View Post


This is also my understanding of the DVI-DL bandwitdh 9.9 Gbit (330 MHz).

2560x1440 @120Hz 24 bit = 15.75 Gbit w/overhead (442.37 MHz) is way beyond DVI-DL can carry.

330MHz is not the limit of what DL-DVI is capable of. 330MHz is what DL-DVI must be garunteed to carry. Anything beyond that is dependent solely on your video card manufacturer's implementation of their TMDS signal and the quality of your DL-DVI cable. 330MHz is only the minimum.


Thanks.

 

So can it be done 2560x1440 @120Hz with the current graphichs cards?

 

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post #977 of 1131
Quote:
Originally Posted by Ken1649 View Post



Thanks.

So can it be done 2560x1440 @120Hz with the current graphichs cards?

Mmm... as to the exact wording you used, yes. It can be done.

Do not expect it to show up on as a selling point on any of them though.
post #978 of 1131
Quote:
Originally Posted by kevinsbane View Post

Quote:
Originally Posted by Ken1649 View Post

Thanks.

So can it be done 2560x1440 @120Hz with the current graphichs cards?

Mmm... as to the exact wording you used, yes. It can be done.

Do not expect it to show up on as a selling point on any of them though.


 

This particular monitor can actually receive whatever signal we push from graphichs card instead of receiving 60Hz then refreshes it to what we set it to?

 

And how to make it compatible with the OS to work with games at that resolution and refresh rate?

 

Thanks.

 

 

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post #979 of 1131
Quote:
Originally Posted by shadman View Post

For some reason I thought this was earlier than March 30..and was also hoping "next days" meant less than 16. But still, I'm very anxiously waiting to make sure I get a decent one. Its why I'm following this thread.
I thought this too, and my mother thought of buying and reselling a few too, but I just don't know enough friends with money appearently. Though I might just jump the gun and try finding someone anyway if the one get doesn't end up getting to 90Hz

There was an update since March 30, I guess you weren't following the thread closely enough? wink.gif
post #980 of 1131
Quote:
Originally Posted by Ken1649 View Post

This particular monitor can actually receive whatever signal we push from graphichs card instead of receiving 60Hz then refreshes it to what we set it to?

And how to make it compatible with the OS to work with games at that resolution and refresh rate?

Thanks.

I would suggest you carefully read through the OP (and any links) for this thread and the Catleap Monitor Club thread; you're asking a lot of questions that have already been answered.

Short versions; this monitor can take 120-130Hz (at least warmed up) with the 2B versions, and video cards can drive anywhere from 90Hz up to 133Hz depending on which card and how you set it up in software. More information can be found in the OPs.
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