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R9 290X Crossfire will not increase fps?

post #1 of 46
Thread Starter 
When I use CFX, my fps only increases by 5 on average. Biggest increase is 40fps in BF4. Some games, such as tomb raider, boishock infinite and alan wake, dead space 3, apache air assult, alan wake american nightmare ect are showing negative CFX at times, with minimal fps increases at random.

The only game that gives exactly double fps is Metro 2033 on highest settings.

I am using a fresh install of Windows 8.1 Pro 64 bit (Fully up to date), latest MB drivers and latest MB bios.
CCC 13.12 WHQL.
ULPS OFF
Power +50%
Core park disabled

Any idea's?

Thank you.
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post #2 of 46
If youre running in Window/Borderless you wont see any improvements as CF only works in Fullscreen mode.

Are you monitoring GPU usage for both cards?

Have you tried synthetic benchmarks that are known to scale will multiple GPUS?
post #3 of 46
which resolution? Which is the gpu/vram usage?What if you try unparking cores
  
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post #4 of 46
Thread Starter 
Quote:
Originally Posted by jerrolds View Post

If youre running in Window/Borderless you wont see any improvements as CF only works in Fullscreen mode.

Are you monitoring GPU usage for both cards?

Have you tried synthetic benchmarks that are known to scale will multiple GPUS?

Heaven and Valley seem fine. The only drop in fps and GPU usage comes with scene changes.

Quote:
Originally Posted by PontiacGTX View Post

which resolution? Which is the gpu/vram usage?What if you try unparking cores

It's a 1080p screen with 144Hz refresh rate.
VRAM usage can be between 2 to 3 GB depending on the application.
GPU usage is all other the place on some games. No constant line as such. This is to be expected because MSI uses an algorithm to calculate an approximate usage since it can't actually read the GCN 2 architecture properly.
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post #5 of 46
Use gpuz for measuring the core usage and which drivers are you using?
  
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post #6 of 46
OH, so your using the Asus vg248qe?
Nonetheless, crossfire doesn't really work at 144hz. AMD is fully aware of this problem, but nothing has been done about it for months. Try it in 120hz or 60hz and I assure you, you'll see the increase in frames (Even though you'll be limited by your refresh rate.) .
post #7 of 46
Thread Starter 
Quote:
Originally Posted by PontiacGTX View Post

Use gpuz for measuring the core usage and which drivers are you using?

Both cards are full speed ahead.
Quote:
Originally Posted by King PWNinater View Post

OH, so your using the Asus vg248qe?
Nonetheless, crossfire doesn't really work at 144hz. AMD is fully aware of this problem, but nothing has been done about it for months. Try it in 120hz or 60hz and I assure you, you'll see the increase in frames (Even though you'll be limited by your refresh rate.) .

My sig rig says VG278HE.
There is nothing wrong with 144Hz and AMD.
No increase at 120Hz or 60Hz. Just line tearing at 60Hz.
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post #8 of 46
Try using windows 8 or 7
  
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post #9 of 46
How about trying new DVI cables?
post #10 of 46
Bradley, try a DirectX 9 title, something mainstream (that would definitely have had a Crossfire Profile). Devil May Cry 4 comes to mind or Dirt 3.

I have a hunch it is simply poor Dx10/11 GPU usage (had this in several titles on the 7970s, it appeared the GPU usage was 98% or 99% then I changed the polling rate to extreme rate 15~20ms and saw it dropping from 98 to 45 to 99 to 55 to 98 extremely fast, not with my eyes though, it was also logged.) Issue never appeared in DirectX 9 titles.

So just try a DX9 fullscreen test.
Edited by RagingCain - 1/10/14 at 12:25pm
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