Specifications

Release 331 Quadro, NVS, Tesla, & GRID Drivers for Windows - Version 332.50 RN-WQ33250-01_v01

Once Installed, the SDI Capture Driver Release Must Always

Match the Graphics Driver

To use the Quadro SDI Capture card, you need to install the NVIDIA WDM driver for

the Quadro SDI Capture card after installing the Quadro professional driver. The WDM

driver version must be from the same branch as the installed NVIDIA graphics driver.

If at a later time you install a different Quadro professional driver version–for example,

when upgrading from a Release 260 driver to a Release 265 driver–you must reinstall the

WDM driver from the same driver branch as well– in this example, Release 265.

You must install the updated WDM driver even if remove the SDI Capture card and

uninstall the WDM driver. Portions of the old WDM driver remain on the system, and

the resulting mismatch with the updated graphics driver results in a faulty driver

installation. Installing a matching WDM driver corrects this issue.

Some APIs do not Report Total Available Graphics Memory

Correctly

Background–TAG Memory

In the Windows Display Driver Model (WDDM), Total Available Graphics (TAG)

memory is reported as the sum of

• Dedicated Video Memory (video memory dedicated for graphics use)

• Dedicated System Memory (system memory dedicated for graphics use), and

• Shared System Memory (system memory shared between the graphics subsystem

and the CPU).

The values for each of these components are computed according to WDDM guidelines

when the NVIDIA Display Driver is loaded.

Issue

NVIDIA has found that some TAG-reporting APIs represent video memory using 32-bits

instead of 64-bits, and consequently do not properly report available graphics memory

when the TAG would otherwise exceed 4 gigabytes (GB). This results in under reporting

of available memory and potentially undesirable behavior of applications that rely on

these APIs to report available memory.

The reported memory can be severely reduced. For example, 6 GB might be reported as

454 MB, and 8 GB might be reported as 1259 MB.