1000 GTX GPUs deliver startup problems with DVI with high pixel clock ‘

Jun

28

2016

Nvidia GTX 1000 users who have connected a 1440p monitor with a refresh rate higher than 90Hz via a dual link cable -DVI, encounter problems starting their system. Using other cables not the problem occurs.

Conceptronic DVI – HDMI (F) Systems can not just start a Nvidia GeForce GTX 1080 or 1070 when a screen is connected via dual link DVI and the pixel clock leads to a value higher than 330MHz. The problem is reported on Reddit and appears already to be reported on the GeForce Forum.

In practice, in particular for users of monitors with a resolution of 2560×1440 pixels and a refresh rate higher than 60Hz. The problem occurs only when the display is connected via a DL-DVI cable. Users who have a screen with display port connector, are experiencing the problem.

Although most of the monitors at high resolution and refresh rates greater than 60Hz have a DisplayPort connector, which is for example not the case for Qnix QX2710. This 27 “screen, which is popular with gamers, has a resolution of 2560×1440 pixels and is known for the ability to overclock the refresh rate to values ​​higher than 60Hz.

Nvidia has not yet responded to the problem and also not right on the latest drivers, the system startup. Users who encounter the bug nuisance argue that the best solution is to reset the refresh rate to turn off or restart to a lower value so that the system can boot it properly.

The pixel clock can be roughly calculated by multiplying the width and height of the resolution and refresh rate. Thus, a monitor with 2560×1440 pixels and a refresh rate of 60Hz worth about 221MHz. At refresh rates from about 90Hz at 1440p resolutions to the problem occur.

Update 15.00: The problems are most likely caused because the maximum pixel clock of the DL-DVI standard is set at 330MHz. The use of a refresh rate and a resolution that results in a higher pixel clock thus falls outside of the specification. However, it is striking that it now poses a problem with the 1000 GTX cards. The relevant Qnix monitor is a long time by many users with a higher pixel clock used with older video cards.

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