Hello,
I am experiencing performance issues when running an OpenGL application with the Intel HD Graphics 4000.
System properties:
Motherboard: Intel DH77DF
BIOS: KCH7710H.86A.0103.2012.1029.1732
CPU: Core i7-3770S (8M Cache, 3.10 GHz)
Memory: 16 GB
Memory speed: 1600 MHz
OS: Windows 7 Professional SP1 64-bit
GPU: Intel HD Graphics 4000
Graphics driver version: 9.17.10.2875
Video BIOS: 2143.0
Display resolution: 1920x1080
Refresh rate: 60p Hz
The application consists in displaying images in a window either at the highest frame rate possible or at 60 fps with vsync on.
Here are some frame rate results with vsync off:
-window size of 480x270: ~2000 fps
-window size of 960x540: ~300 fps
-window size of 960x1080: ~145 fps
-full screen window: ~65 fps
And these are results with vsync on:
-window size of 480x270: ~32 fps
-window size of 960x540: ~60 fps
-window size of 960x1080: ~59.5 fps
-full screen window: ~59 fps
Running two instances of this same test application causes the performance figures to drop to the following (vsync off):
-window size of 480x270: varies between 500 and 1500 fps
-window size of 960x540: ~140 fps
-window size of 960x1080: ~62 fps
-full screen windows: ~30 fps
With two instances and vsync on:
-window size of 480x270: ~58 fps
-window size of 960x540: ~58 fps
-window size of 960x1080: ~50 fps
-full screen windows: ~30 fps
Something is clearly wrong when vsync is on and there seems to be a very high performance drop when vsync is off and the window size is increased.
Can anybody help on this?
Cheers,
e_dod_as