is what i am experiencing artifacting or something else?

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towlie

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I have a very slight distortion that goes all the way from one end of the screen to the other, like a hairline distortion if you were to place a piece of glass over an image where the glass ends the entire picture is slightly out of line. I have watched videos of artifacting and there are random effects all over, what I see is only when moving and only in some games. the "line" I speak of will jump from one position on the screen to another, generally always in the top 1/4 of the screen, but always going all the way across horizontally. I don't have my video card overclocked, and I am running the latest drivers.

I have tried to screen shot this effect but the screenshots are always clear.
 
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bambiboom

bambiboom

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towlie,

A curious thing.
Wild guesses >

1> If the problem began immediately after updating, I would've guessed a driver problem. I had a situation where I used the latest drivers on an older series Quadro FX 4800 and a lot of fussing, it seems the FX 4800 didn't like the 3D stereo component- which also increased the driver size from 117 to 177MB. Uninstallation and then re-installation without the 3 stereo fixed it. There is also this trend where display problems occur unless there is a completely clean uninstall of the old driver. So, simplest things first, you might consider making certain of a clean uninstall and then install an older driver.

2> Another test to eliminate it as a factor is to leave everything as is and try a different monitor in case it's a de-interlacing issue.

3> My only other wild guess is that you might try connecting the monitor with a different connection / cable- especially if you're using a Displayport to DVI adapter which could have an intermittently failing circuit.

If you could provide some more history of the drivers, the problem, the graphics card you're using, monitor, card to monitor connection, and game(s) that demonstrate the fault, there will be someone here that knows all about it.

Cheers,

BambiBoom

 
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towlie

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the connection is dvi-d, the computer specs are
3570k @ 4.5Ghz
sabertooth z77
32gb g.skill ripjaws z 1866
ocz vertex 4 128GB x2
Asus Titan PCI Express 3.0
Cooler Master HAF X 942
Cooler Master Silent Pro 1200w
Thermaltake Water 2.0 Extreme 81.3 CFM Liquid CPU Cooler
27" IPS LED CrystalPro Monitor WQHD 2560x1440

I installed fraps to try to record the issue, but for whatever reason the problem is not showing up on the fraps video.
 
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towlie

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the game I see the issue most in is WOW, also see it in SWTOR. I have been running in windowed mode fullscreen, however I changed it to fullscreen and the problem is gone when in fullscreen mode. what could/would cause this to happen in windowed fullscreen mode?
 
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bambiboom

bambiboom

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towlie,

Very nice specification- well done.

Another couple of wild guesses- did this system have this display problem with another video card? I only mention this as I've read of the some of the first Titans having some issues. These varied, and some suspected drivers, some were thought to be due to GPU overclocking , and yet underclocking didn't cure it, and so on. The Tesla K20 /K20X and GTX 780 use variants of the GK-110 and I would have thought that drivers would have been well sorted by now.

If this system has only ever used the Titan, just to eliminate any hardware fault, do you have or can borrow another GTX that will run the current drivers? Do the artifacts appear when the settings are lower?

You mention that the card is not overheating- what kind of temperatures do you see on the i5?

The inability to record the fault is interesting as it reminds me of an odd situation in which I had artifacts when making 2D images from 3D Sketchup models. this happened only models with vast numbers of polygons- I had a model with 300X full 3D trees- and the odd thing was, the image was almost obscured by the artifacts, but they did not appear when the image was saved. This immediately suggested drivers as in the processing chain, the fault could be isolated to GPU > display. As I was having other problems in 3D CAD applications- distortions in shadows, textures not displaying, viewports not opening, I changed the GTX 285 to a Quadro FX 4800 and my problems disappeared without ever learning the exact source.

Amazing what a person has to know!

Cheers,

BambiBoom


 
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towlie

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this is an all new build, I briefly had a 670gtx (system built first of april, mid april I returned the 670 and bought the titan)
my previous system was degrading and it seemed to be related to my 560ti. I have since moved that computer to another location, so I don't have direct access to it at this time. am in the process of a cross-ship rma, this will allow me to try another titan directly and even play around with sli titans for a couple weeks ;o)

what has my attention on this is not seeing it in regular fullscreen mode, its only in windowed modes (reg windowed or windowed fullscreen) that the problem takes place.

I had seen these distortions before, but now they seem to be more pronounced, I should give some additional background to things on this. I overclocked my cpu to 4.5 Ghz, temps stay very low, no where near max under stress, so I assumed I had a stable overclock. I had a handful of bluescreens that took place over several weeks time, each one showing a different driver listed as the failure cause via bluescreenview.

in order to reach 4.5Ghz I had to set my voltage on my cpu to 1.31v (which from what I have read seems to be a very high figure, but since temps are fine due to watercooling I kept the overclock). about a week ago I started getting random "program has stopped responding" when playing WOW and SWTOR. this issue was more frequent if I had a movie going or a movie paused while running either game.

after reading many threads I found one solution was the guy raised his voltage on his CPU OC, and the problem stopped. So I raised my voltage to 1.38v (temps still fine, temps remained fine up to 1.41v from earlier testing when doing original oc) and i have not had that "program has stopped responding" issue since. however this is when I noticed the distortion originally mentioned in this post, and was trying to find out if raising my voltage was causing harm somehow even though the temps were well under limits.

So now my hope is that this issue shouldn't be happening in windowed mode at all, and am also hoping its a bad video card, the other concern is that the problem is with my monitor itself, which would involve a higher expense to return ship, and this is the only 2560x1440 monitor I have, so I would have to go back to my smaller 1920x1080 while I waited for the replacement.
 
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bambiboom

bambiboom

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towlie,

Thanks for the additional information. I had heard of the effects experienced with instability due to CPU undervolt when overclocking, but it > your procedure of going in low instead of high- and possibly melting the thing - and then bringing it back up to a stable operation was the better method than pushing the limits and going down/ A good lesson to remember.

This problem is intriguing and as may be resolved when you try a second Titan. It may still be worth trying the 1920 X 1080 monitor just to eliminate the 2560 X 1440.

I poked about a bit and didn't see another exact account of it, but this post had an element that might be worth considering >

> ""What you are describing sounds a lot like tearing. Tearing happens due to the card writing to the video buffer at the same time the monitor is updating the image on the screen. If the card is writing at the same time, you end up with two images being displayed at once. The two images being slightly off will look like a horizontal line. If the timing of the card and video aren't in sync, that horizontal line will move up and down as well.

Try turning on V-sync in the games this occurs in. You might also want to turn on triple buffering too, or it can have a large impact on your FPS if it's lower than your refresh rate. "" < END

My thought was that you situation of the distortion occurring only when the game is in a window (not fullscreen) is setting up the kind of asynchronicity of two images displayed at once as mentioned above. The Titan is trying to write to the dynamic game image- running at a high frame rate- and simultaneously to the desktop image or other windows that are not running at the dynamic frame rate, but only at the static refresh rate.

Just a thought.

Cheers,

BambiBoom
 
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towlie

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I don't understand what you mean, as far as I know its always a good idea to keep vsync on so as to not work your video card more than you have to. I have used vsync for 8 years, and I personally don't know anyone who doesn't use it.
 
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bambiboom

bambiboom

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towlie,

Sorry, I was only saying that when considering the v-sync possibility, that with your knowledge and experience I didn't expect you would have missed having v-sync as a potential problem. However, while I knew only a little bit about v-sync and before the post quoted had never heard of it as a possible problem- I could've "missed it".

Cheers,

BamibBoom
 
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towlie

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well correct me if i'm wrong, but it looks like what you pasted was giving v-sync as a solution, not as a potential cause of the problem. my statement was based off it being a solution meaning it was already on, so therefore it can't be a solution.
 
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bambiboom

bambiboom

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towlie,

I think we're on the same page. Yes, the post was offering v-sync as a solution, but as I mentioned, I assumed you would not have turned it off- "missed" having v-sync ON. I wasn't writing clearly. My thought - as convoluted as it sounds- is that if loss of v-sync could cause this two-windows conflict and horizontal line distortion as in the post, there was a possibility of a hardware (Titan) problem that was causing a loss of v-sync. This involved an intuition- based on no information- that there was a v-sync subsystem on the Titan that might fail independently. When full-screen, that aspect of the v-sync wouldn't come into play and the display would be normal. You mentioned that the problem got worse over time which suggested a gradual hardware failure. If it was a driver it seems it would have been a consistent problem.

I need to study rather make things up!

Cheers,

BambiBoom

 
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towlie

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ok so it turns out my issue is called screen tearing. I found some pics showing what screen tearing is, and that is what my problem turns out to be. Many years ago when I first bought a gaming video card I described this issue to a friend and he said it was called artifacting, i thought what iw as seeing was a form of artifacting, and have operated under this assumption for years. now that the terminology of what was wrong has changed my options and my remedy was to turn on vsync via the global settings on NVidia control panel. doing this eliminated the issue, according to the posts i read using a games vsync can and did in my case, have a problem syncing up, so by using the video cards setting to force vsync from the source, it solved the issue.

So if you are having the same issue, if you turn on vsync in your global video card settings directly, that is what fixed it for me.
 
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