user manual
52
Querying the Frame Lock Capabilities of a System
Query the number of  Quadro G-Sync II devices on the 
system by passing NV_CTRL_TARGET_TYPE_FRAMELOCK to 
XNVCTRLQueryTargetCount().
Query the Quadros attached to each Quadro G-Sync II device by 
querying the 
NV_CTRL_GPUS_USING_FRAMELOCK attribute for each 
Quadro G-Sync II device.
Query the enabled (available) displays on each Quadro using the
 NV_
CTRL_ENABLED_DISPLAYS attribute.
Confi guring the Frame Lock Group 
This must be done while frame lock is disabled on the Quadro G-Sync II 
device:
Set the frame lock master display on one of  the Quadros using the   
NV_CTRL_FRAMELOCK_MASTER attribute.
Set the rest of  the display devices as slaves using the 
 NV_CTRL_
FRAMELOCK_SLAVES attribute.
Set 
NV_CTRL_USE_HOUSE_SYNC to  NV_CTRL_USE_HOUSE_SYNC_
TRUE or NV_CTRL_USE_HOUSE_SYNC_FALSE on the master Quadro 
G-Sync II device, depending on whether or not you will be using a 
House Sync signal.
This refers to the G-Sync device that is attached to the Quadro that 
contains the display device currently set as the frame lock master. 
Set 
NV_CTRL_FRAMELOCK_POLARITY for each slave Quadro G-Sync 
II device in the cluster.
Most likely, you want NV_CTRL_FRAMELOCK_POLARITY_RISING_
EDGE.
Set 
NV_CTRL_FRAMELOCK_SYNC_DELAY as appropriate for each 
Quadro G-Sync II device.
Most likely, you want 0.
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NVIDIA Quadro G-Sync II User Guide










