Experiencing problems (including odd video artifacts) on a fresh Win7 re-install

I'm encountering odd problems while trying to rebuild my Windows 7 desktop PC.


Background: I purchased my desktop PC (a Dell Studio XPS 435 MT, with Radeon HD4670 and dual monitors) about three years ago. It came with Windows Vista. Soon after I received this PC, I formatted the system partition and then installed Windows 7 Ultimate. Windows 7 worked well; over time, however, as I installed and uninstalled many applications, it began to exhibit odd behavior. About a year ago, thin horizontal black lines occasionally began appearing randomly across both monitors -- apparently leftover artifacts from application windows. In addition, certain actions (e.g., the display of User Account Dialogs, locking of the desktop, unlocking the desktop) no longer occurred simultaneously on the two monitors; rather, the primary monitor would update, a couple of seconds would transpire, and then second monitor would update. I updated the video drivers (from Windows Update, but not from AMD's site), without improvement. I had installed various codecs. I figured that the video drivers, codecs, and conflicting applications were contributing to the problem.


I began rebuilding this PC over the weekend. I formatted the system partition, installed Windows 7, and applied perhaps 200 items (required and optional) from Windows Update, en masse. Perhaps this was unwise; some of the updates seemed to conflict with one another, causing odd error messages and occasional lockups. I re-installed Windows 7 again -- this time, only installing critical updates. Even before proceeding to install optional updates, including updated video and monitor drivers, the thin horizontal black lines are appearing again! In addition, the problem where certain actions are not simultaneously appearing on the two monitors is present again.


I'm reluctant to install all of my applications and to restore from backups until I know that the hardware is OK.


Any ideas as to what the root cause might be? Could something with the video card -- perhaps RAM - be at fault?

I suppose the obvious question would be does it have problems with just one monitor?

Have you tried another video card?

You seem to be leaning toward a problem with some update, or some software. You can control the Video driver updates and the other updates should not be involved...

I will use just one monitor and then observe the results. The screen artifacts appear randomly and intermittently, however, so it might be difficult to know whether that resolves the problem. In any case, wouldn't this still indicate a hardware problem?

I'm seeing the screen artifact problem even prior to installing any video and monitor updates -- so I'm not necessarily leaning towards this being a problem with some update, or software. (That said, I was disappointed to see that simultaneously installing all pending updates on Windows Update resulted in conflicts; I would think this would be a typical action and, therefore, not prone to conflicts.)

I don't have any other video cards; I can buy another, but where do I begin? What's considered a decent, middle-of-the-road, video card manufacturer and model these days?

If you were to try a new video card, what type would have to be up to your needs, but we aren't there yet.

Are you using DVI outputs for both monitors? Have you tried switching them and checked the connections?

Does it do the same thing with different resolutions? I would suggest safe mode, but it probably won't run both monitors.

Have you checked your bios for any video type options that might have some effect. Have you checked for any bios updates and whether they might address video problems?

Are you loading your own codecs immediately, or only after the problems present? Could some software be loading codecs or affecting your system in some way?

Thanks for your comments.

The system came from Dell with an AMD Radeon 4670. if I were to replace it, I would probably go with something like (after a quick search on Amazon.com) an EVGA GeForce -- perhaps the GTX 550.

I'm using DVI outputs for both monitors. I plan to re-seat the card and the connectors tonight to see if it helps. I will also make sure the fan is working. I'm guessing that any of these things could be causing the weird video issues I'm experiencing; either that, or perhaps the video card has simply become defective.

I haven't tried other resolutions to see if it makes a difference -- but will do so.

The PC's BIOS is up-to-date. In the the three years I've had this system, I haven't changed anything in the BIOS; however, I'll double-check the settings. I don't believe there are firmware updates for the video card; however, I'm not sure. It's interesting that this problem began only about a year ago.

I'm not yet to the point of installing any codecs--nor any video and monitor drivers. I'd like to make sure the system is stable before I install anything else.

I tried using just one monitor. I also made sure that there are no graphics-related settings in the PC BIOS. Lastly, I removed the monitor cables from the card, removed the card, cleaned the dust from the card, it's fan, the monitor cable connectors, and the PC motherboard. The screen artifacts still appeared randomly and intermittently.

Do video cards such as the Radeon HD4670 have firmware that needs to be updated?

I am not familiar with the AMD video cards, but I don't see a firmware update available for download. You may be able to find something. The latest Catalyst drivers are from late July 2012, but I assume you already have those. There were also some HydraVison drivers mentioned, if you use those.

If you have reinstalled your OS, have the latest drivers, and made sure all the mechanical connections are good, not sure what is left. Trying another video card might help to see if it could be just the card, even an inexpensive one to test.

At one point earlier this week, during numerous formats/installs (to look for a culprit), I did install the latest Catalyst and HydraVision drivers. The screen artifacts still appeared randomly and intermittently.

Yesterday, I purchased an EVGA GeForce GT 610 2048MB GDDR3 graphics card. I formatted and re-installed Windows 7. Unlike the Radeon, I noticed that the screen resolution remained at the lowest level and that only the primary monitor received a signal. It wasn't until I installed the EVGA drivers that the resolution was properly set and the second monitor was detected. Most importantly, however, I no longer see screen artifacts!

I do notice, however, that my Windows 7 Performance Index Score for Graphics is lower than what it was with the Radeon: 4.7 vs. 5.something -- although, so far, I haven't noticed any graphics performance issues. Perhaps I should have opted for a higher-performance card--maybe the EVGA GeForce GTX 550 I described earlier? 610 is higher than 550; but GTX seems to have higher specs than the GT. Conflicting variables!

Did you rerun the Performance Index assessment? You should be getting around a 7 for your graphics score, but I don't run two monitors. But I do get a 7.3 for a GTX 260. The Nvidia cards go by 400 500 600 which are really model years or releases for a particular chipset.

Yes, I ran the assessment twice. Rebooted in between.

I will disconnect the second monitor and then re-run the assessment to see the effect.

So the GT610 is newer than the GTX550? I believe the former has DDR3 whereas the latter has DDR5