Very poor HD7990 performance

[ikari1]

Yes to both. It was very minimal but I'm pretty sensitive to it. It was smooth as butter on Crossfire with Windows 7 64 but I wanted to move to Windows 8 64 for BF4 (which now plays a lot better....)

 

[LtMatt]

Yes to both. It was very minimal but I'm pretty sensitive to it. It was smooth as butter on Crossfire with Windows 7 64 but I wanted to move to Windows 8 64 for BF4 (which now plays a lot better....)

Just something you could maybe try when you next play bf3. Open up the game console and type RenderDevice.ForceRenderAheadLimit 1 and hit enter.

I wonder if your aging cpu has anything to do with it. Are you at 1080p?

 

[tdream]

Whats the point in 7990 if you don't enable crossfire.

 

[LtMatt]

Whats the point in 7990 if you don't enable crossfire.

Well if its causing stutter then it makes sense to disable it. At least he still has a 7970 to run bf3 smoothly which is more than enough. I'm pretty sensitive to stutter myself though and for me bf3 is so smooth i run my 7950's at stock without them breaking sweat.

 

[ikari1]

I'll try the console command. The CPU is only at 30%-40% and only reaches 50% in BF4 with both GPUs running at 90%+ so no problem there.

 

[LtMatt]

I'll try the console command. The CPU is only at 30%-40% and only reaches 50% in BF4 with both GPUs running at 90%+ so no problem there.

Well I've seen other people with that cpu report similar issues. Slight bottlenecking (not always 99% usage on both gpu's) and a little stutter as a result of that.

 

[ikari1]

I always have Vsync on so that limits the CPU/GPU usage especially in older games.

 

[LtMatt]

I always have Vsync on so that limits the CPU/GPU usage especially in older games.

Can you try this config file? It might cure the problem. Place it in your main BF3 folder.

http://www.sendspace.com/file/1xb8kx

Does that remove the tiny stutter you have with xfire enabled?