Multiple GPUs - Revision history

Vmaslov at 09:43, 7 October 2019

2019-10-07T09:43:00Z

Vmaslov at 09:20, 7 October 2019

2019-10-07T09:20:58Z

Vmaslov at 11:15, 21 October 2015

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Vmaslov at 11:13, 21 October 2015

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Vmaslov at 13:16, 18 May 2015

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Pavel at 10:09, 1 November 2014

2014-11-01T10:09:59Z

Pavel at 08:56, 1 November 2014

2014-11-01T08:56:45Z

Pavel: Created page with "== Multiple GPUs in iPi Mocap Studio == With [http://ipisoft.com/pro-edition Pro Edition], you can use multiple GPUs to speed up tracking. You should be aware of the follo..."

2014-10-31T17:36:43Z

Created page with "== Multiple GPUs in iPi Mocap Studio == With [http://ipisoft.com/pro-edition Pro Edition], you can use multiple GPUs to speed up tracking. You should be aware of the follo..."

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== Multiple GPUs in [[iPi Mocap Studio]] ==
With [http://ipisoft.com/pro-edition Pro Edition], you can use multiple GPUs to speed up tracking.
You should be aware of the following limitations:
* You can use only '''1''', '''2''' or '''4''' GPUs inside one PC. Other configurations (for example, 3 GPUs) are not supported.
* Currently we recommend using only single-GPU video cards (e.g. '''NVidia GTX 780'''). iPi Soft never tested multi-GPU video cards like '''NVidia GTX 690''', and it is not known if there is a way to disable SLI/Crossfire for multi-GPU video card (to make it usable in [[iPi Mocap Studio]]).
* For best efficiency, all GPUs must be of approximately the same performance. [[iPi Mocap Studio]] cannot balance load for multiple GPUs with different performance levels, so mixing low-end and high-end GPUs will result in very poor performance.
* Due to synchronization overhead, performance scaling is not linear. Performance gain diminishes with the number of GPUs. Using second identical GPU will speed up tracking approximately by a factor of '''1.6''' (instead of factor of 2, as one might expect).
* Performance gain is more noticeable for large number of cameras (for example, '''8''' cameras). If you are using just 1 Kinect camera (or other single depth sensor), you may experience negligible performance improvement from a multi-GPU configuration.
* Combining multiple low-end GPUs makes little sense. You may achieve much better performance by upgrading to a single high-end gaming GPU like '''NVidia GTX 780'''.
* Multiple GPUs usage is available only in [http://ipisoft.com/software/pro-edition Pro Edition]. In other editions you can try this functionality but in this case all results will be saved in [[.iPiLocked_File_Extension|restricted trial format]] which prohibits export of result animation.

== How to Configure Multiple GPUs ==
[[Image:Disable_SLI.png|thumb|How to disable SLI (click to enlarge)]]
To configure your multiple video cards for use in [[iPi Mocap Studio]], you should perform the following steps:
# Disable '''SLI''' or '''Crossfire'''
# Restart [[iPi Mocap Studio]]. Now it should be able to use your additional GPUs.

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-{{EditionFeature|Pro}}
+{{EditionFeature|Pro|try}}
 == Multiple GPUs in [[iPi Mocap Studio]] ==
@@ Line 9: / Line 9: @@
 * Performance gain is more noticeable for large number of cameras ('''6+'''). If you are using just '''1''' Kinect camera (or other single depth sensor), you may even experience performance downgrade compared to a single GPU.
 * Combining multiple low-end GPUs makes little sense. You may achieve much better performance by upgrading to a single high-end gaming GPU like '''NVidia GTX 970''' and above.
 == How to Configure Multiple GPUs ==

@@ Line 3: / Line 3: @@
 You should be aware of the following limitations:
 * You can use only '''1''', '''2''' or '''4''' GPUs inside one PC. Other configurations (for example, 3 GPUs) are not supported.
-* Dual-GPU video cards like '''NVidia GTX 690''' work in [[iPi Mocap Studio]] in the same way as 2 separate GPUs. The same instructions are applicable to such cards.
+* Dual-GPU video cards like '''NVIDIA GTX 690''' work in [[iPi Mocap Studio]] in the same way as 2 separate GPUs. The same instructions are applicable to such cards.
 * For best efficiency, all GPUs must be of approximately the same performance. [[iPi Mocap Studio]] cannot balance load for multiple GPUs with different performance levels, so mixing low-end and high-end GPUs will result in very poor performance.
 * Due to synchronization overhead, performance scaling is not linear. Performance gain diminishes with the number of GPUs.  Using second identical GPU will speed up tracking approximately by a factor of '''1.6''' (instead of factor of 2, as one might expect).
-* Performance gain is more noticeable for large number of cameras (for example, '''8''' cameras). If you are using just 1 Kinect camera (or other single depth sensor), you may even experience performance downgrade compared to a single GPU.
+* Performance gain is more noticeable for large number of cameras ('''6+'''). If you are using just '''1''' Kinect camera (or other single depth sensor), you may even experience performance downgrade compared to a single GPU.
 * Combining multiple low-end GPUs makes little sense. You may achieve much better performance by upgrading to a single high-end gaming GPU like '''NVidia GTX 970''' and above.
 * Multiple GPUs usage is available only in [http://ipisoft.com/software/pro-edition Pro Edition]. In other editions you can try this functionality but in this case all results will be saved in [[.iPiLocked_File_Extension|restricted trial format]] which prohibits export of result animation.

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 == How to Configure Multiple GPUs ==
-[[Image:Disable_SLI.png|thumb|How to disable SLI (click to enlarge)]]
 To configure your multiple video cards for use in [[iPi Mocap Studio]], you should perform the following steps:
 # Disable '''SLI''' or '''Crossfire'''
 # Restart [[iPi Mocap Studio]]. Now it should be able to use your additional GPUs.