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Windows 7: Very BAD 2D GDI performance AMD drivers (15.x - 18.x) on Classic theme

17 Aug 2018   #1
radeonwin7bug

Windows 7 SP1 x86
 
 
Very BAD 2D GDI performance AMD drivers (15.x - 18.x) on Classic theme

Very low 2D performance on Classic theme Windows 7 - bug in RADEON drivers.

This bug all new AMD cards:
- Radeon HD 7XXX;
- Radeon R5, R7, R9 series;
- Radeon RX 400, RX 500 series
with Radeon Driver - from Catalyst v15.7 to Radeon Crimson v18.8.1 (all versions)

1) Installing RADEON driver reduces the 2D performance by 10-50 times.
Demonstration of foobar2000 and P-CAD on the "Standard VGA" and after installing RADEON Driver v18.7.1 with FPS measurement using simpleGLUT

Decrease in FPS = 750-780 to FPS = 27-54 (in the foobar2000 spectrum)
Drawdowns FPS = 1300 to 10 when scaling a drawing in P-CAD



2) The switch of video memory frequencies (150-1500 MHz) on the CLASSIC theme keeps the memory frequency at the minimum value of 150 MHz, even when the GPU load is 100%. At the same time, on the AERO-theme, even when the GPU is little loaded, the memory has already switched to 1500 MHz.


3) Reduced Windows performance and low FPS from the Radeon driver. On the "Standard VGA Graphics Adapter" - no problems.

Programs for the test:
2D Test with source code - https://github.com/JMKh3r/2DTest/releases/tag/1.3.0.0
SimpleGLUT with source code - http://rgho.st/87wYV9wgB

Radeon driver v15.7.1:
FPS = 4 - 1100 (huge drawdown FPS)
Very large lags when moving windows.


"Standard VGA Graphics Adapter":
FPS = 510-720
There are no lags when you move the window.


4) Absurd!.. Increase 2D GDI performance from nothing. If you place the "Radeon Settings" window underneath the spectrum window, so that at least 1mm of the window is visible outside the spectrum window, then the spectrum is accelerated tens of times and the FPS in simpleGLUT rises from 40-60 to 1100-1300. AMD drivers can not determine the resources, which the program requires, and mistakenly sets the video card to minimum performance.


Short video:



My System SpecsSystem Spec
.
19 Aug 2018   #2
radeonwin7bug

Windows 7 SP1 x86
 
 

Video demonstration 19/08/2018.

My System SpecsSystem Spec
Reply

 Very BAD 2D GDI performance AMD drivers (15.x - 18.x) on Classic theme




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