Where is my bottleneck?

[PutuLips]

Hi there. My specs are in my signature. In most games, I get pretty low fps with a pretty good GPU and a somewhat decent CPU. In most low-strain games (and some high strain dx11), especially league of legends, I get better fps and more smooth frames with crossfire disabled. It seems that something is bottlenecking it. I can play battlefield 3 on ultra with aa off with 50-75fps, but get the same frame rate in old dx9 games with crossfire. Something pretty strange I found was when I went into software in catalyst control centre, it said that the PCI was only 8x for each rather than 16x. Not sure if that's because of it being 2 GPUs on 1 card, but it looks wrong to me... (Not sure really)

What do you think the problem might be?

Thanks.

[Excon]

I don't see any bottle necks. Just a weaker system. I'm not to experienced with dual GPU cards but it makes sense that it would be running 8x per GPU.

 

Edit: i went through and read that again now I understand your issue

[M-ursu]

Upgrade your GPU PCI-E 8x wont matter performance.

[DiamondFX]

Hi there. My specs are in my signature. In most games, I get pretty low fps with a pretty good GPU and a somewhat decent CPU. In most low-strain games (and some high strain dx11), especially league of legends, I get better fps and more smooth frames with crossfire disabled. It seems that something is bottlenecking it. I can play battlefield 3 on ultra with aa off with 50-75fps, but get the same frame rate in old dx9 games with crossfire. Something pretty strange I found was when I went into software in catalyst control centre, it said that the PCI was only 8x for each rather than 16x. Not sure if that's because of it being 2 GPUs on 1 card, but it looks wrong to me... (Not sure really)

What do you think the problem might be?

Thanks.

 

The PCI-e 8x/16x shouldn't matter that much but try a few games and benchmark them if you have the time. You have a pretty good video card. Some games will be CPU-bound while others force the GPU. I also suspect the FX-6100 not delivering enough juice for the GPU. 

[TechFan@ic]

Do you have the latest driver ? the 13.8 BETA drivers have implemented frame-pacing to reduce micro-stutter.
CPU performance doesn't seem to matter much in LoL.
http://www.tomshardware.com/reviews/league-of-legends-performance-benchmark,3484-8.html

What I would do personally is sell that 5970 and get a single GPU card for a more predictable level of performance.

 

[Leonard]

You bottleneck is your GPU 5970 is weak for bf3 even with PCIx16. The cheapest solution is to use 13.8 drivers but you still won't be at 75fps.

[PutuLips]

The PCI-e 8x/16x shouldn't matter that much but try a few games and benchmark them if you have the time. You have a pretty good video card. Some games will be CPU-bound while others force the GPU. I also suspect the FX-6100 not delivering enough juice for the GPU. 

I'll try benchmarking a few games and get back when I'm done.

 

Do you have the latest driver ? the 13.8 BETA drivers have implemented frame-pacing to reduce micro-stutter.

CPU performance doesn't seem to matter much in LoL.

http://www.tomshardware.com/reviews/league-of-legends-performance-benchmark,3484-8.html

What I would do personally is sell that 5970 and get a single GPU card for a more predictable level of performance.

I have all the latest drivers. Frame pacing only "smooths" the frames, it doesn't add more performance (only perceived improvement). The problem is getting lower fps with one gpu enabled than with two.

 

You bottleneck is your GPU 5970 is weak for bf3 even with PCIx16. The cheapest solution is to use 13.8 drivers but you still won't be at 75fps.

I usually get 50-75fps with one  gpu enabled (essentially a 5850 with 2gb gddr5), or both enabled I get slightly worse with more stuttering, so I don't really get how the gpu can be the bottleneck.

[Leonard]

I'll try benchmarking a few games and get back when I'm done.

 

I have all the latest drivers. Frame pacing only "smooths" the frames, it doesn't add more performance (only perceived improvement). The problem is getting lower fps with one gpu enabled than with two.

 

I usually get 50-75fps with one  gpu enabled (essentially a 5850 with 2gb gddr5), or both enabled I get slightly worse with more stuttering, so I don't really get how the gpu can be the bottleneck.

You need to do some research on CrossfireX scale-ability and drivers.

[mymouthandi]

None of the hardware is the problem there, as others have said it's mostly likely driver and game related. The performance of Crossfire is game dependent.

[Hammerhead]

GPU looks like the weaker link in that rig.