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- Joined
- 31 May 2008
- Posts
- 5
Hello, long time reader but never posted, however I've now found a problem that stumps me enough to ask for help.
I recently bought the Powercolor ATi Radeon HD4850 from here on OCuk to replace my two very aged 7600GS'.
The problem is, whenever I open up seemingly any game (tested Mass Effect, Team Fortress 2 and World of Warcraft) I get weird FPS effects. For about 4 seconds or so the games will play as they should at high FPS then for about 3-4 seconds it will crash to low fps, or a short freeze up. This effect loops pretty much constantly while playing any of these games.
So far I've played around with the drivers, including 8.5, 8.6 and 8.6 with the Hotfix, but no help. I've done a fresh windows install, again no help. I thought it might be ATi Overdrive acting funny and changing clock frequencies mid game, but even with Overdrive disabled and the clock frequencies set manually, the effect still happens.
However, what I did notice was, with GPU-Z the GPU load acting incredibly erraticly:
With ATi overdrive:
Without Overdrive and the clocks set using AMD GPU Clock Tool:
As you can see from each of the images, the GPU is not taking the load properly, and those spikes of performance roughly match the lag I'm getting in games. At first I thought it was the Overdrive tool, as from the first image it looks like the performance is changing as the frequencies go up and down, but it doesn't seem to be that, as it happens even without overdrive on.
That's about it, can't think of anything else to say apart from list off my system specs:
Core 2 Duo E6600 @ stock 2.4GHz
MSI P6N SLi V2 (650i chipset)
Powercolor ATi Radeon HD4850
4GB GeIL 800MHz DDR2 RAM
So, any ideas anyone?
I recently bought the Powercolor ATi Radeon HD4850 from here on OCuk to replace my two very aged 7600GS'.
The problem is, whenever I open up seemingly any game (tested Mass Effect, Team Fortress 2 and World of Warcraft) I get weird FPS effects. For about 4 seconds or so the games will play as they should at high FPS then for about 3-4 seconds it will crash to low fps, or a short freeze up. This effect loops pretty much constantly while playing any of these games.
So far I've played around with the drivers, including 8.5, 8.6 and 8.6 with the Hotfix, but no help. I've done a fresh windows install, again no help. I thought it might be ATi Overdrive acting funny and changing clock frequencies mid game, but even with Overdrive disabled and the clock frequencies set manually, the effect still happens.
However, what I did notice was, with GPU-Z the GPU load acting incredibly erraticly:
With ATi overdrive:
Without Overdrive and the clocks set using AMD GPU Clock Tool:
As you can see from each of the images, the GPU is not taking the load properly, and those spikes of performance roughly match the lag I'm getting in games. At first I thought it was the Overdrive tool, as from the first image it looks like the performance is changing as the frequencies go up and down, but it doesn't seem to be that, as it happens even without overdrive on.
That's about it, can't think of anything else to say apart from list off my system specs:
Core 2 Duo E6600 @ stock 2.4GHz
MSI P6N SLi V2 (650i chipset)
Powercolor ATi Radeon HD4850
4GB GeIL 800MHz DDR2 RAM
So, any ideas anyone?
