![[H]ard|Forum](/styles/hardforum/xenforo/logo_dark.png){kind=logo}
I have read that some people have an issue where their GPU clock speed will stay at full speed in idle mode until they run a 3D app.
And what I'm going to describe sounds like this issue, but maybe I'm not aware of the extent of it or maybe mine is just different... But here it goes.
I start up Windows and my GPU is 750MHz and my MEM is 500MHz.
If I run a 3D app in Window mode, Furmark, ATI Tool, or even a game. The GPU and MEM speeds stay the same. Which is annoying because the MEM speed is running very low for the game I want to play in Window mode.
If I exit the 3D windowed application, the clock speeds stay the same.
If I run a 3D application in fullscreen mode, the clocks still stay the same, GPU 750, MEM 500, but after I exit, the GPU comes down to 507MHz.
If I go back into the 3D application a second time, now my memory speed finally increases to 900MHz.
If I exit, the clock speeds go back to GPU 507, MEM 500.
If I try the 3D app in windowed mode, it stays at GPU 507, MEM 500.
So my summary...
If I want to play a 3D game in full screen mode, I need to run a 3D app, like Furmark at least once and exit it, before playing the game in full screen mode. Otherwise the memory will be running at almost half speed.
If I want my GPU to run at idle speed (not going to play a game), then I'll need to run a 3D application in full screen mode at least once and exit it.
If I want to play a game in window mode. Well, so far I have no idea how to get windowed 3D apps to run at full 750MHz/900MHz speeds.
I tested this with ATI Catalyst 8.9 official and 8.10 beta drivers.
And what I'm going to describe sounds like this issue, but maybe I'm not aware of the extent of it or maybe mine is just different... But here it goes.
I start up Windows and my GPU is 750MHz and my MEM is 500MHz.
If I run a 3D app in Window mode, Furmark, ATI Tool, or even a game. The GPU and MEM speeds stay the same. Which is annoying because the MEM speed is running very low for the game I want to play in Window mode.
If I exit the 3D windowed application, the clock speeds stay the same.
If I run a 3D application in fullscreen mode, the clocks still stay the same, GPU 750, MEM 500, but after I exit, the GPU comes down to 507MHz.
If I go back into the 3D application a second time, now my memory speed finally increases to 900MHz.
If I exit, the clock speeds go back to GPU 507, MEM 500.
If I try the 3D app in windowed mode, it stays at GPU 507, MEM 500.
So my summary...
If I want to play a 3D game in full screen mode, I need to run a 3D app, like Furmark at least once and exit it, before playing the game in full screen mode. Otherwise the memory will be running at almost half speed.
If I want my GPU to run at idle speed (not going to play a game), then I'll need to run a 3D application in full screen mode at least once and exit it.
If I want to play a game in window mode. Well, so far I have no idea how to get windowed 3D apps to run at full 750MHz/900MHz speeds.
I tested this with ATI Catalyst 8.9 official and 8.10 beta drivers.