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I'm a long time Linux user and have minimal experience with Windows. That being said, I bought a Nvidia GT 730 and Windows 7 Ultimate yesterday to play a new game. This doesn't have anything to do with playing the game; it happens all the time.

In Linux, I use the Intel HD Graphics 4600 (i7-4770) for both monitors without any problems.

The monitor configuration is 1920x1200 on the primary and 2560x1440 on the secondary. In Linux, the primary is connected via HDMI and secondary via DP. In Windows, they are both connected via DVI.

Getting back to the problem on Windows:

I've installed the latest Nvidia 346 drivers, and they are working properly. Resolutions on both monitors are detected correctly (no EDID problem), and the primary (1920x1200) looks perfect. The secondary (2560x1440) looks like garbage. The secondary resolution is set to 2560x1440, which the Nvidia control app properly detects as the native resolution. Text is barely readable.

Native 2560x1440 resolution:

Here's a photo of the monitor in 2560x1440.

Next lowest 16:9 resolution, 1920x1080:

Here's a photo at the next lowest 16:9 resolution, 1920x1080.

I'm having trouble figuring out what could possibly be happening. I've tried all kinds of searches for similar problems, and I'm coming up empty. Unfortunately, my lack of Windows and even discrete GPU experience is causing me trouble. Any help would be greatly appreciated.

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  • They're both connected via DVI. It's a Benq BL2710PT.
    – fandingo
    Mar 28, 2015 at 10:30
  • Why do you change monitor connections between OSs?
    – fixer1234
    Mar 28, 2015 at 16:21
  • @Psycogeek. Thanks for the tip about DVI-DL. That was the problem. The weird part is that I've long used a Mac on this monitor that uses mini-DP to DVI-SL. Oh well.
    – fandingo
    Mar 29, 2015 at 3:11

1 Answer 1

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The higher resolutions like 3K or 4K , or any resolutions over the usual 1920x1080 or 1920x1200, gets over the bandwidth capability for a single link DVI. The graphics card would have to supply a Dual Link connection. The DVI cables would have to connect completly the dual link connections.

https://en.wikipedia.org/wiki/Digital_Visual_Interface

Without the bandwidth capability, it is apparent from your picture that you instead get some badly interpolated mess.

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