LCD Screen buying advises

Just go to the displayport site and get an authorized one. They are on Amazon, I bought 3 and have used them on triple screens with all 3 monitors @ 144 Hz (AMD 7970 Matrix) and Nvidia triples @ 144 Hz and 120 Hz 3D.

How to choose a displayport cable and not get a bad one --> http://www.displayport.org/cables/how-to-choose-a-displayport-cable-and-not-get-a-bad-one/

List of certified displayport cables --> http://www.displayport.org/products-database/?products_category%5b%5d=cables-connectors&products_manufacturer= (select the "Cables" box then click "SEARCH")
 
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oHOWEo said:
Ive been messing with the display port cable all day, In the end I thought **** it and connected via HDMI, well guess what.... full native resolution at 60hz 32 bit colour.... what the hell! All problems solved!!!!!
Click to expand...

Are you sure you're getting native resolution (3440x1440) @ 60Hz via HDMI? That shouldn't be possible as HDMI doesn't have the required bandwidth. Could it be that you have DSR enabled and the 3440x1440 is actually being rendered at lower resolution? That's the only way I can think you could have it set up for 3440x1440 via HDMI.
 
It works with hdmi 2.0 it has enough bandwidth for 4k at 60 hz. All I can think of is when the monitor was first introduced hdmi 2.0 wasn't commonplace
 
Spinelli said:
Just go to the displayport site and get an authorized one. They are on Amazon, I bought 3 and have used them on triple screens with all 3 monitors @ 144 Hz (AMD 7970 Matrix) and Nvidia triples @ 144 Hz and 120 Hz 3D.

How to choose a displayport cable and not get a bad one --> http://www.displayport.org/cables/how-to-choose-a-displayport-cable-and-not-get-a-bad-one/

List of certified displayport cables --> http://www.displayport.org/products...ry[]=cables-connectors&products_manufacturer= (select the "Cables" box then click "SEARCH")
Click to expand...

I had one on order spin until hdmi saved the day
 
I'm going to check it's not dsr wizardry, techade has planted a seed of doubt, pretty sure its not though. Strange thing is I have been told the monitor hdmi port is only 1.4a also the hdmi lead is a good 3 years old, not sure I buy the theory that the cables themselves differ unless there is a pin change.
 
oHOWEo said:
I'm going to check it's not dsr wizardry, techade has planted a seed of doubt, pretty sure its not though. Strange thing is I have been told the monitor hdmi port is only 1.4a also the hdmi lead is a good 3 years old, not sure I buy the theory that the cables themselves differ unless there is a pin change.
Click to expand...

According to the manual HDMI supports up to 3440x1440 @ 50Hz but not at 60Hz.

So I was kinda right (3440x1440 @ 60Hz not available via HDMI), though I was also kinda wrong because I didn't expect it to support anything over 1080p60 via HDMI.

It looks like the improved HDMI specs are making their way into consumer items at last! :)
 
Ok so I'm still confused, I have the monitors driver installed and when I choose "native resolution 3440x1440 it does only give me the option for 50hz or 60hz with 16bit colour.
I have a custom resolution that is 3440x1440 60hz and 32bit colour, DSR isn't selected in the Nvidia controll panel, am I getting what I think I am?

Screen print below
 
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If HDMI 1.4 runs 4k at 30hz, that makes 3840 * 2160 = 8,294,400 pixels per frame * 30hz refresh rate = 248,832,000 pixel refreshes per second at maximum bandwidth

The LG screen is 3440 x 1440 = 4,953,600 pixels per frame

248,832,000 pixel refreshes per second @ 4k / 4,953,600 pixels on the LG = 50.23hz maximum refresh rate

According to the bandwidth spec it should be able to handle 50hz then.
Click to expand...
source --> http://linustechtips.com/main/topic/171427-dl-dvi-display-3440-x-1440-at-60hz/

According to the last post there, you seem to be really pushing current HDMI v1.4 bandwidth. Surprised you're getting away with it.

Do you have a real short, and real thick guage HDMI cable? Maybe this is what's letting you achieve so much bandwidth over the standard rating, since the ratings are probably worst-case scenario minimums.
 
The manual also suggests that 3440x1440 @ 50Hz is the max via HDMI.

Notice that in oHOWEo's shots 60Hz is listed as a Custom resolution. If it were a standard resolution the monitor reported via EDID then I don't think it would be listed as a custom resolution. Unfortunately I don't have one to test it myself, wish I did! :)
 
Yup, seems about right since 4k (3840x2160) @ 30Hz is about the same as 3440x1440 @ 50Hz. I have a feeling that the HDMI cable of his is just allowing the bandwidth through since the specs of HDMI standards are just bare minimum specs, there's nothing disallowing the data/bandwidth to flow through higher than the "standard-rated" HDMI v1.3/v1.4 advertised specs of 10.2 Gbps (8.16 Gbps video) as long as the particular cable itself happens to be able to handle it...however once passed those specs it's obviously not a guarantee and if problems come about then the user can't blame the cable as it's being run above spec.

Displayport v1.2 offers double the bandwidth of HDMI v1.3/v1.4, and even more than HDMI's new v2.0 (really, HDMI? Sad). DP v1.2 is therefore easily capable of fully powering 1920x1080 @ 144Hz which is about 20% more "intense" than 3440 x 1440 @ 50Hz ("intensity" calculated from total pixels * refresh rate). Furthermore, DP v1.3 just came out (Sept. 2014) and offers even more bandwidth (8K, anyone?).

[TABLE="class: mbot20"]
[TR]
[TD="class: rowcolor1"]Interface
[/TD]
[TD="class: rowcolor1"]Bandwidth
[/TD]
[TD="class: rowcolor1"]Video Data Rate
[/TD]
[/TR]
[TR="class: rowcolor1"]
[TD]DisplayPort 1.3
[/TD]
[TD]32.4 Gbps
[/TD]
[TD]25.92 Gbps
[/TD]
[/TR]
[TR]
[TD]DisplayPort 1.2
[/TD]
[TD]21.6 Gbps
[/TD]
[TD]17.29 Gbps
[/TD]
[/TR]
[TR="class: rowcolor1"]
[TD]HDMI 2.0
[/TD]
[TD]18.0 Gbps
[/TD]
[TD]14.40 Gbps
[/TD]
[/TR]
[TR]
[TD]DisplayPort 1.1
[/TD]
[TD]10.8 Gbps
[/TD]
[TD] 8.64 Gbps
[/TD]
[/TR]
[TR="class: rowcolor1"]
[TD]HDMI 1.4 / 1.3
[/TD]
[TD]10.2 Gbps
[/TD]
[TD] 8.16 Gbps
[/TD]
[/TR]
[/TABLE]

Getting a little off-topic, lol :) Bottom line, oHOWEo, you may happen to have a good quality HDMI cable that allows you to pass beyond the standard-advertised bandwidth specs of HDMI v1.4/v1.3 without issues (screen blanking out, sparkles, etc.). If you want to play it safe, though, rest assured you have options.
 
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One thing to note is hdmi audio is currently disabled, using a dedicated sound card, maybe that's helped on the bandwidth. Having said that I did test the monitor speakers last night via hdmi.
 
Enable vsync, and see if the in-game framerate is at 60 fps (and perfectly smooth), this will surely be all the proof you need to make sure everything is working just fine at true 60 Hz.
 
Spinelli said:
source --> http://linustechtips.com/main/topic/171427-dl-dvi-display-3440-x-1440-at-60hz/

According to the last post there, you seem to be really pushing current HDMI v1.4 bandwidth. Surprised you're getting away with it.

Do you have a real short, and real thick guage HDMI cable? Maybe this is what's letting you achieve so much bandwidth over the standard rating, since the ratings are probably worst-case scenario minimums.
Click to expand...

TechAde said:
The manual also suggests that 3440x1440 @ 50Hz is the max via HDMI.

Notice that in oHOWEo's shots 60Hz is listed as a Custom resolution. If it were a standard resolution the monitor reported via EDID then I don't think it would be listed as a custom resolution. Unfortunately I don't have one to test it myself, wish I did! :)
Click to expand...

Originally in device manager the display showed as generic PnP, I managed to install the driver off the cd after some faffing, it now displays lg 34um95.
In the native options the monitor does tell windows/nvidia 50hz or 60hz with 16bit colour.

I'm sure I didn't set the custom profile up though, it just selected that after switching from that dam dp cable to hdmi.

I'm really hoping it's right because I'm left tainted by display port, it was hanging my computer on bootup, messed up resolution after screen saver etc, real headache. I must of hard reset my pc 40 times over the weekend. I even pulled pin 20 out of the dp cable after reading it could be supplying 3.3v back into my gpu.
A friend of mine has bought his daughter a rabbit, it keeps chewing through his Ethernet cable. Ive donated my dp cable to the rabbit
 
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