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Terrible scaling with 6950CF

post #1 of 53
Thread Starter 
A friend of mine recently purchased two Sapphire HD6950 1GB cards, and the scaling is AWFUL. For one example, at 1680x1050, Enthusiast settings, 2x AA, he only gets 35 fps average in Crysis Warhead O_o

His system specs are:

CPU: AMD Phenom II X6 1055T @ 3.5GHz
RAM: 8GB DDR3-1600 Corsair Vengeance
mobo: MSI 890GXM-G65
PSU: Corsair 850HX
Case: CM HAF922 (so airflow's not the problem)

the games we've tested are (all settings maxed, AA @ 2x whenever possible, resolution @ 1680x1050)

Section 8: Prejudice- 46 fps average
AVP: 55 fps average
Crysis: Warhead- 35 fps average
Crysis- 32 fps average
Metro 2033- 22 fps average
Just Cause 2- 37 fps average

What the heck is going on? We installed MSI Afterburner and his GPU usage usually sits around 30-40%, even when the system is struggling. He's running the latest drivers with the latest crossfire patch, so I'm out of ideas.
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post #2 of 53
Try overclocking the processor a bit more towards the 4GHZ point, it seems like that's whats holding you back at the moment.
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post #3 of 53
Have him run the metro bench according to the bench thread settings.
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post #4 of 53
Is CF enabled and the latest Drivers are installed?
If that is the case I have some bad news for you^^.
1GB should basically still be enough to scale fairly OK but the higher the resolution gets and the more settings you use the worse results you will see.

It isn´t a highly decisive factor of performance or scaling but you can count in 30% at least.
Should have gotten 2GB 6950 CF ..mine scale like bombs so I can only think of that as the problem.

Also make sure all the power connectors are in straight ..with new cards it can sometimes happen that they clinch a little.
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post #5 of 53
Overclock CPU.
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post #6 of 53
Thread Starter 
Quote:
Originally Posted by Kung Pow View Post
Is CF enabled and the latest Drivers are installed?
If that is the case I have some bad news for you^^.
1GB should basically still be enough to scale fairly OK but the higher the resolution gets and the more settings you use the worse results you will see.

It isn´t a highly decisive factor of performance or scaling but you can count in 30% at least.
Should have gotten 2GB 6950 CF ..mine scale like bombs so I can only think of that as the problem.

Also make sure all the power connectors are in straight ..with new cards it can sometimes happen that they clinch a little.
Surely the 1GB model wouldn't scale terribly, and 1680 isn't a high resolution at all, I think.

We'll attempt to push to 4GHz, but his mobo gives incorrect CPU temps, so I don't trust it one bit... that's what has held us back up to this point. We will run the Metro benchmark again, and i'll repost the results.
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post #7 of 53
Somethings definitely wrong for sure then, my 6870s in CF get a lot better framerates on my 1090T at stock on a 1920x1200, I'm thinking its a poor clock you've got there and an unstable clock can cause worse frames than a stable stock. The processor you have at a higher clock than mine should be able to push a lot more fps out than that.
Edited by davieg - 5/10/11 at 11:16am
    
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post #8 of 53
reinstall windows
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post #9 of 53
Thread Starter 
Nevermind, let the thread die. Just had this steam convo with him:

Priest.-FTX-.: after doing some research, I think you're getting terrible performance with your cards because your CPU isn't clocked high enough
name removed: I think I'm getting excellent performace, **** off. My six core is doing fine.
Priest.-FTX-.: I'm just saying, your scaling is pretty bad, you barely get 10 frames from the second card...
name removed: **** you, I'm fine. My CPU doesn't need to go any higher, it is fast. Take your 4GHZ and shove it.

*copied directly from steam*

so... show's over, folks. Thanks for the advice.
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CPUMotherboardGraphicsRAM
Ryzen 1700 Asrock X370 Taichi EVGA GTX1080Ti SC Black 16GB G.Skill DDR4-3200 
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480GB PNY SSD 1TB Western Digital Blue m.2 SSD 3TB Seagate Barracuda 7,200RPM Wraith Spire LED 
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Windows 10 Home 64-bit Seasonic 650W 80+ Gold Phanteks Eclipse P400 
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post #10 of 53
Ugh.. CPU overclocking helps... a little. You are bottlenecked by the CPU/NB or the internal memory controller. A thuban should have no problem achieving 3000mhz on the CPU/NB. This will free things up and CrossFire scaling will be where it should be.
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