ATI Quadfire

I recently bought a second 2gb Hd4850x2 to quadfire I have enabled all 4 gpus in CCC it has decreased performance while gaming compared to my old single 2gb hd4850x2 I disabled two of the gpu's and performance was back to where it was but I ran MSI afterburner and the onscreen display server and it only shows one gpu running I'm not sure whats causing the problem I tested my gpus in GPUZ and they all work PLEASE HELP this is my driver- Driver Packaging Version 8.821-110126a-112962C-ATI
Catalyst Version 11.2
Provider ATI Technologies Inc.
2D Driver Version 8.01.01.1123
2D Driver File Path /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/CLASS/{4D36E968-E325-11CE-BFC1-08002BE10318}/0002
Direct3D Version 7.14.10.0812
OpenGL Version 6.14.10.10524
Catalyst Control Center Version 2011.0126.1749.31909
AV Stream (T550 Pro) Driver Version 6.14.10.394
7 answers Last reply
More about quadfire
  1. What steps did you take to install them?

    How did you test performance?

    What are your full system specs?

    There's known issues with certain games when using quadfire.
  2. I checked the sensors in gpuz only showing one gpu running in all of my games Crysis/Crysis warhead/Half Life 2/Left for dead/Rainbowsix vegas2/World of warcraft etc. I ran 3dmark06 only got a score of 11,000 on the gpu driver status saying not fm approved my build is the following AMD Phenom2x4 965 Deneb 125watt quadcore 3.4-3.8 Oced/ 4GB OCZ DDR3 1600 BE ram{8-8-8-24}/ Seagate Barracuda 1TB 64mb cache HDD/2 2GB HD4850X2s/Rocketfish 1000watt peak 900 watt continuos nvidia sli certified PSU+Apevia 600 watt psu bridged
  3. Why did you bridge a 1000W PSU with a 600W PSU??

    Anyway, make sure you have the latest Crossfire Application Profiles. You'll also want to completely uninstall your drivers and then reinstall them with both cards plugged in.

    Also I don't know if those cards have 1 or 2 bridges but sometimes 1 works best, sometimes 2.

    Crysis is one of the games that quadfire doesn't seem to work well. I remember a bunch of people with CF 5970s complaining about it.

    Otherwise try some benchmarks like 3DMark Vantage, 3DMark 11, Furmark, and any standalone or in game benchmarks you have (crysis, dirt 2, avp, f1 2010, stalker, re5...)
  4. sorry i forgot my mobo MSI 790FX GD70 socket AM3 only
  5. I did uninstall and reinstall my drivers after defragging the hard drive same problem I'll try reinstalling the app profile hotfixes
  6. wolfram23 said:
    Why did you bridge a 1000W PSU with a 600W PSU??

    Anyway, make sure you have the latest Crossfire Application Profiles. You'll also want to completely uninstall your drivers and then reinstall them with both cards plugged in.

    Also I don't know if those cards have 1 or 2 bridges but sometimes 1 works best, sometimes 2.

    Crysis is one of the games that quadfire doesn't seem to work well. I remember a bunch of people with CF 5970s complaining about it.

    Otherwise try some benchmarks like 3DMark Vantage, 3DMark 11, Furmark, and any standalone or in game benchmarks you have (crysis, dirt 2, avp, f1 2010, stalker, re5...)

    I bridged the 2 psus to make sure i have enough power to run 2 dual gpu cards still having problems with running the quadfire in games only one gpu running I appreciate all your help but I don't know what else to do thanx
  7. The only other thing I can think of is depending on how the rails are setup on those PSUs, you may have too much power drawn on a single rail. I've seen before where simply swapping this or that connector unleased the full power.

    The only other thing would be possibly specific older drivers will work best for you, since anything in the last 6 months at least has focused on 5xxx series or newer.
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