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Yamakasi Catleap Monitor Club - Page 389

post #3881 of 11297
Thread Starter 

MANY cards can handle this at native and beyond.  My initial OCing was done on a GTS 250 w/2 of these bad boys connected.  Now, if by saying "handle" do you mean 100FPS, Ultra settings, etc in BF3 and Skyrim?  Well then, yes you need a big, bad boy card to handle it.  If you get your hands on an OC model, then you want a single 670 or 680 (which can easily hit 120hz with manual timings.)  Any SLI prevents hitting the 120 mark.  AMD cards are a PIA to OC these monitors with, but we recently had a member hit 103hz with one - the highest we have seen.  I believe that success was totally dependent on his card - much like whether you can OC your CPU to a certain point w/certain voltages - it's a crap shoot with AMD cards I am afraid.  This is mainly due to their pixel clock limitations that nVidia doesn't have.  Well, nVidia's clock is just higher so it can push more pixels at a higher refresh rate.

 

Stockers, read: 60-65hz Cats, can be pushed well in most games with mid- to upper-level GPUs - RED or GREEN.  Doesn't matter much so your preference is what will drive that decision.

   
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post #3882 of 11297
Still on the hunt for a monitor that is around 23", no anti-glare screen, and can do 100hz with ease, and more preferably 120hz, perhaps a pipe dream smile.gif - but maybe they'll come out with a new line soon that will do 100+hz guaranteed. Maybe I'm just dreaming though. I got to this party late so I guess all the current catleaps/yamakasi can only do 65hz max? That's what I read anyways.
post #3883 of 11297
Quote:
Originally Posted by eternal7trance View Post

\
Depends on the seller I suppose. I got a DOA monitor with dcsamsungmall and he's currently making it hell to return. I'm in the middle of a paypal dispute now with him. Been a month and a week since the monitor stopped working and I emailed him originally.


well, if i got it i would buy the third party Warrenty (dont get them for electronics i buy in NA, but returning it seems like such a hassle that it scares me... thats why im only really afriad of DOA, if it dies after 3 weeks i can just contact the warrenty people!


Ill hunt around a bit more for a seller that i can trust
    
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post #3884 of 11297
Anybody else have an issue where, when your computer turns off the display, the backlight on the screen stays on sometimes?
post #3885 of 11297
Quote:
Originally Posted by DRatchet View Post

Anybody else have an issue where, when your computer turns off the display, the backlight on the screen stays on sometimes?

I believe that is a quite a normal issue with LED lights in general. I have LEDs in my room and they keep on slighly glowing after turned off.
post #3886 of 11297
Thread Starter 

A BIG THANK YOU! to TheJesus who has been contacting both AMD and nVidia about the issues we are having getting to 120hz (also with SLI).  Here is his post from another site w/the companies' respective answers:

 

 

Alright, Nvidia's real support has typed up quite the response. This pretty much states you're lucky the Kepler can do it, Fermi can't, and the actual SLI bridge forces the 400MHz pixel clock.

 

*Hello,

 

The case was escalated to me. The 330MHz pixel clock limit is true for Kepler and Fermi when using the dual-link DVI connection. If the connection is over HDMI/DisplayPort then there is a difference between Fermi series (225MHz) and Kepler (340MHz). I don't know the confirmed tested speeds of all connectors but I do know that it's possible to get it working beyond specification. But anything beyond the specification may or may not work depending on the monitor, and result will vary with different cards.

 

Looking at the EDID timing you provided for this monitor, a pixel clock of 400Mhz (399.84Mhz) would be required to reach 2560x1440@100hz and 500Mhz (497.76Mhz) for 2560x1440x120Hz. I'm surprise you are able to get this to work with dual-link DVI at all, unless you are over-clocking the DVI in order to get more bandwidth. I don't see any other way dual-link DVI would work since 120Hz would require a lot more than 330Mhz. Again I suspect depending on the board, it may be possible to get it working beyond specification, but the result will vary from board to board. Its like over-clocking, some boards will over-clock better than other boards. I've confirmed with engineering and current pixel clock for Kepler and Fermi is correct.

 

SLI is more timing sensitive so the timing enforcement will be more strict, this is by design to insure stability. The same is true for other GPU clock specifications when it comes to SLI. Take the GPU core or memory clock for example, in an SLI configuration if the clocks are different for each GPU then the software will always default both GPUs to the lowest common clock. Another word if one GPU was running at 800Mhz while the other was running at 825Mhz, as soon as you enable SLI both GPU will now run at 800Mhz. I suspect the strict timing requirement is likely preventing pixel clock to run any higher than the default.

 

Based on my understanding on the issue, and my discussion with engineering, I don't see anything that suggest a problem with hardware or our software implementation. If you're asking us to up the specification on our pixel clocks then I'm afraid that's not something we will do unless there is valid reason for it. These clocks are set after rigorous engineering calculations and testing, they are set at those levels for good reasons. As for the restriction when in SLI mode, that is by design and expected behavior. If I'm mistaken then please help clarify the issues.

 

 

Best regards,

Ray*

 

Followed by:

 

*Hello,

 

Sorry, slight correction on my part with previous specification. The TMDS specification I listed below did not account for DL-DVI. The max, theoretical TMDS link clock is 225MHz for Fermi and is 340MHz for Kepler, which was derived from the HDMI SL requirements. So DVI DL, could go up to 450MHz on Fermi and up to 680MHz on Kepler. Note that these are all theoretical, the real values are determined during qual. Also note that the quality of cabling may be a factor beyond the standards limits.

 

The result you are reporting is in-line with the specification. Kepler is capable of the 2560X1440@120Hz but Fermi is limited to 2560x1440@100Mhz due to the 450Mhz. If you look at the monitor EDID detail timing the 24560x1440@120Hz would require 500Mhz, which Fermi is not capable of supporting. I've confirmed with engineering on these specifications.

 

 

Detailed Timing [DTD#1] 2560 x 1440 @ 120.00Hz Pixel Clock : 497.76MHz HBlank, HBorder : 160, 0 HSyncStart, HSyncWidth : 48, 32 VBlank, VBorder : 85, 0 VSyncStart, VSyncWidth : 3, 5 Image size : 640mm x 360mm DigitalSeparate +/-

 

Detailed Timing [DTD#2] 2560 x 1440 @ 100.00Hz Pixel Clock : 399.84MHz HBlank, HBorder : 160, 0 HSyncStart, HSyncWidth : 48, 32 VBlank, VBorder : 30, 0 VSyncStart, VSyncWidth : 3, 5 Image size : 640mm x 360mm DigitalSeparate +/-

 

 

Thanks,

Ray*

 

And one more:

 

*Hello,

 

I just got confirmation from engineering that the maximum speed of the SLI bridge is 400Mhz, which would explain why this is limited while in SLI mode. So it's not so much the common timing but a limit on the SLI bridge.

 

Thanks,

Ray*

 

And I also got this from AMD:

 

*Dear Matt,

 

Response and Service Request History:

 

So, how exactly can we assist you on this issue. As I mentioned before there is a hardware limitation thru DL-DVI.

 

In order to update this service request, please respond, leaving the service request reference intact.

 

Best regards,

 

AMD Global Customer Care*

   
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post #3887 of 11297
Thread Starter 

As we have seen nvidia kicks butt for OCing these monitors and their customer support.

   
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post #3888 of 11297
Nvidia: Wall of text discribing the problem

AMD: Umm... what?

Gotta love Nvidia!
    
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post #3889 of 11297
Quote:
Originally Posted by Kosta88 View Post

I believe that is a quite a normal issue with LED lights in general. I have LEDs in my room and they keep on slighly glowing after turned off.

I don't think that's it. The screen actually stays on, it's just black, but lit up. Sometimes it shuts off properly, other times it doesn't. When I turn it off using the power button, it always turns off properly. It's just when my computer turns the display off to save power, etc.
post #3890 of 11297
so i'm debating on grabbing one of the catleap monitors or throwing another 480 in my rig for sli.

been throwing the idea around for a few days still haven't decided.
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