This page enables you to enter custom timings for your NVIDIA GPU based graphics card in order to support a variety of different display timings for ultimate flexibility for analog CRT and DVI connections.
Note: Use this page only if you are an advanced user and are knowledgeable about display timings and their effects.
Note: This display selection section is available only for Quadro and NVS products, and only under Windows 7 and later operating systems.
Select the displays to which you want to apply the custom resolution. A successful resolution change will result in a custom resolution being created for the associated connector output, regardless of which display is connected to that connector at a later time. The resolution change must be successful across all the displays that you select, otherwise the new resolution will not be created.
To import a custom resolution, click Import settings and then use the Import Settings dialog to locate and import the file containing the custom resolution you want to import.
Horizontal pixels: Enter the number of pixels to be visible in one horizontal line.
Vertical lines: Enter the number of pixels to be visible in one vertical line.
Color depth (bpp): Enter the number of bits per pixel.
Refresh rate (Hz): Refers to the frequency at which the entire screen is refreshed. Specifically, refresh rate indicates how many times per second the electron beam in the picture tube is moved from top to bottom in the case of a CRT (analog display).
Note: The frequency is limited by the display's maximum horizontal scan rate and the current resolution, as higher resolution implies more scan lines. The value should not exceed the display's maximum vertical scanning frequency.
Scan type: Refers to the method of sending the image to your display.
Interlaced: Refers to interlaced scanning, where even scan lines are drawn during the first field in a frame and odd scan lines are drawn during the second field in the frame. Interlaced scanning results in a higher frame rate but usually causes image flicker.
Progressive: Refers to progressive scanning, where all the scan lines are updated in each frame.
If the Timing section is not already expanded, click Timing to access the advanced timing settings.
Standard: Click the list and select one the options for setting the timing standard:
Auto automatically determines the best standard.
GTF (General Timing Formula) is an older but widely used timing standard. However, newer display are switching to the CVT standard.
DMT (Discrete Monitor Timings) is a set of pre-defined VESA timings. VESA updates this standard every year. If DMT timing is available for a specific mode, the NVIDIA display driver normally selects it instead of General Timing Formula (GTF).
CVT (Coordinated Video Timings) became the VESA standard on March 2003. CVT supports higher resolutions better than other timing standards.
CVT reduced blank ( Coordinated Video Timings-Reduced Blanking) improves on the CVT standard. CVT-RB offers reduced horizontal and vertical blanking periods and allows a lower pixel clock rate and higher frame rates. This is the default setting for Quadro and NVS products.
Manual allows you to set the timing settings individually.
Active horizontal pixels: Enter the same value as the horizontal pixels reported by Windows.
Active vertical pixels: Enter the same value as the vertical pixels reported by Windows.
Horizontal front porch: Specify the horizontal blanking period that occurs between the end of the active period and the beginning of the synchronization pulse.
Vertical front porch: Specify the vertical blanking period that occurs between the end of the active period and the beginning of the synchronization pulse.
Horizontal sync width: Specify the width of the horizontal blanking period during which the synchronization pulse triggers horizontal re-scanning.
Vertical sync width: Specify the width of the vertical blanking period during which the synchronization pulse triggers vertical re-scanning.
Total horizontal pixels: Maximum is the total horizontal pixels associated with the display mode.
Total vertical pixels: Maximum is the total vertical pixels associated with the display mode..
Horizontal sync polarity: Specify the direction of rapid, transient change in the amplitude of a signal from the baseline during the horizontal synchronization pulse. If the horizontal synchronization polarity is positive (+), the value of the horizontal synchronization pulse is higher than the baseline value. If the horizontal synchronization polarity is negative (-), the value of the horizontal synchronization pulse is lower than the baseline value.
Note: You can select the horizontal synchronization polarity independently of the vertical synchronization polarity.
Vertical sync polarity: Specify the direction of rapid, transient change in the amplitude of a signal from a baseline during the vertical synchronization pulse. If the vertical synchronization polarity value is positive (+), the value of the vertical synchronization pulse is higher than the baseline value. If the vertical synchronization polarity value is negative (-), the value of the vertical synchronization pulse is lower than the baseline value.
Note: You can select the vertical synchronization polarity independently of the horizontal synchronization polarity.
Horizontal refresh rate: Specify the horizontal scan rate. The value you enter also sets the corresponding vertical refresh rate.
Vertical refresh rate: Specify the refresh rate. The value you enter also sets the horizontal refresh rate.
EIA-861B timing parameters, such as the two samples listed below, are the types of display timing and modes that you would have to select or create for use with an HDTV display.
861B (1920 x 1080 @ 59.94) -I
861B (1920 x 1080 @ 59.94) -P
861B refers to an EIA/CEA (Electronic Industries Alliance) standard and would apply to certain 861 High Definition television (HDTV) displays. This standard consists of display timing and formats that allow the graphics card to connect to Consumer Digital Televisions over a DVI connection and configure itself for the optimum settings of that display.
-P means “progressive scanning,” which is a method of sending an image to your display where all the scan lines are updated in each frame -- in other words, all of the scan lines are displayed sequentially. This method, used in modern computer displays, generally reduces flicker in the displayed image and results in smoother motion for videos.
-I means “interlaced scanning,” which is another method of sending the image to your display where even scan lines are drawn during the first field in a frame and odd scan lines are drawn during the second field in the frame. Another way to explain this method is that two passes are used to paint an image on the screen. On the first pass, every other line is painted and on the second pass, the rest of the lines are painted. Unlike the “progressive scanning” method, where all the scan lines are updated in each frame, interlaced scanning results in a higher frame rate but usually causes image flicker.