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Crossfire :(

Afaik it doesn't matter which connector you use. I have mine connected to the left 2. What driver version are you using?

It may just be frame latency, should be a driver coming out the end of next month to fix it.
 
Puppetmaster said:
Afaik it doesn't matter which connector you use. I have mine connected to the left 2. What driver version are you using?

It may just be frame latency, should be a driver coming out the end of next month to fix it.
Click to expand...

Just installed 13.6 beta 2 now. this not frame latency this frame rate droping from 120 to 30 just moving camera.
 
bf3 (and some other games) are a pain to get working nicely with crossfire. it can be done though.
i had loads of stuttering for a while, but osrted it and it runs smooth now. can't remember the settings off the top of my head, and i'm at work now, but i'm sure ltmatt will be along shortly to sort you out.
 
Can you have afterburner monitor running too so we can see what the clocks/usage is doing during the frame drops. Shouldn't be going anywhere south of 80-90fps on dual 7900's.
 
Vsync? grab radeonpro and use dynamic vsync also drop the Flip Queue Size to 1 or failing that 0 - yes I know it says higher settings reduce stutter.
 
Gpu-z always says the 2nd gpu isn't running as ulps is enabled so it's switched off unless in game.

For BF3, Open txt pad and put this into it:

RenderDevice.TripleBufferingEnable 0
RenderDevice.ForceRenderAheadLimit 1
RenderDevice.VSyncEnable 0

Save it as 'user.cfg'

Drop it straight into your BF3 directory(where BF3.exe is).

If that's not any better, change it to this:

RenderDevice.TripleBufferingEnable 0
RenderDevice.ForceRenderAheadLimit 1
GameTime.MaxVariableFPS 120
RenderDevice.VSyncEnable 0
 
Ok changed map from oman and now seems much better. Going to run heaven and will post results here.

You know what else is happening, when I join a game my mic stops working? :( things just not going well here. :mad:
 
tommybhoy said:
Gpu-z always says the 2nd gpu isn't running as ulps is enabled so it's switched off unless in game.

For BF3, Open txt pad and put this into it:

RenderDevice.TripleBufferingEnable 0
RenderDevice.ForceRenderAheadLimit 1
RenderDevice.VSyncEnable 0

Save it as 'user.cfg'

Drop it straight into your BF3 directory(where BF3.exe is).

If that's not any better, change it to this:

RenderDevice.TripleBufferingEnable 0
RenderDevice.ForceRenderAheadLimit 1
GameTime.MaxVariableFPS 120
RenderDevice.VSyncEnable 0
Click to expand...

Thanks Tommy I think disabling the in game Triple buffer is the fix.
 
These heaven 3.0 results look fine?

rvgn.jpg
 
1. Disable ULPS. With it enabled gpu's have different usage causing micro stutter sometimes. Gpu 1 usage up at 100% and gpu 2 down at 70-90%. Side effect of zero core. Should be ok if you keep cards at stock, but when you overclock it can cause problems.

2. CPU Bottleneck increases micro stutter, for me. Tested and confirmed by using a much lower cpu frequency.

3. Match gpu clock speeds.

4. If you don't use vsync, leave flip queue size on 3, ie default. Something has changed recently regarding this. I now play with vsync off, don't even use radeon pro at all, leave everything at default. No microstutter, or very little anyway. Adjust flip queue size back to 1 and i get micro stutter. (with vsync off)

If you use vsync try what tommy suggested

RenderDevice.TripleBufferingEnable 0
RenderDevice.ForceRenderAheadLimit 1
GameTime.MaxVariableFPS 120
RenderDevice.VSyncEnable 0

My i7 is running @4.85 now after i found it bottlenecking the gpu's at lower frequencies in bf3. I believe 4.5ghz and higher eliminates most of it, if you have an i7 with HT.

shankly1985 said:
Thanks Tommy I think disabling the in game Triple buffer is the fix.
Click to expand...

Yep bf3's fake triple buffering has always caused stuttering problems.

You can enable it safely (triple buffering) if you create a bf3 profile in RadeonPro. Disable vsync in game first. If you do it via radeonpro you get no stutter and no input lag, if flip queue is at 1.
 
Last edited:
LtMatt said:
1. Disable ULPS. With it enabled gpu's have different usage causing micro stutter sometimes. Gpu 1 usage up at 100% and gpu 2 down at 70-90%. Side effect of zero core. Should be ok if you keep cards at stock, but when you overclock it can cause problems.

2. CPU Bottleneck increases micro stutter, for me. Tested and confirmed by using a much lower cpu frequency.

3. Match gpu clock speeds.

4. If you don't use vsync, leave flip queue size on 3, ie default. Something has changed recently regarding this. I now play with vsync off, don't even use radeon pro at all, leave everything at default. No microstutter, or very little anyway. Adjust flip queue size back to 1 and i get micro stutter. (with vsync off)

If you use vsync try what tommy suggested

RenderDevice.TripleBufferingEnable 0
RenderDevice.ForceRenderAheadLimit 1
GameTime.MaxVariableFPS 120
RenderDevice.VSyncEnable 0

My i7 is running @4.85 now after i found it bottlenecking the gpu's at lower frequencies in bf3. I believe 4.5ghz and higher eliminates most of it, if you have an i7 with HT.



Yep bf3's fake triple buffering has always caused stuttering problems.

You can enable it safely (triple buffering) if you create a bf3 profile in RadeonPro. Disable vsync in game first. If you do it via radeonpro you get no stutter and no input lag, if flip queue is at 1.
Click to expand...

Disabling ULPS I have ticked this in Trixx is that all I need to do or is there a windows command?
 
shankly1985 said:
Thanks guys all seems to be working now :) 120hz FIfa 13 wow but had to force 120hz with radeonPro fifa was picking up 60hz.
Click to expand...

pgi947 said:
Didn't know this was possible?? Thought it was engine limited to 60Hz/60fps?
Click to expand...

Can be tricky to get crossfire working properly in fifa sometimes simply because the game is not demanding enough. Often i would find the 2nd gpu would go into power saving mode while playing causing some stutter and or fps drops.

The way around this for me was either

A)Create a CCC fifa 13 profile and whack on super sampling, 12-24xAA Edge Detect. Add some anisotropic filtering x16. This would get me around 30-50% usage from both gpu's and stop any stutter and gpu clock drops as the gpu'd have some decent load applied to them.

or

B)Create a profile in RadeonPro and select the over drive tab and tick Always use highest clocks while gaming.

I'm at 60hz and i use vsync though so i don't know how it would affect 120hz.
 
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