Second video card not detected in Device Manager

L

Lowtech

New Member
Hi all,

My first post here and unfortunately I'm posting because I've stumbled right into some technical issues with this fresh desktop build.

First off, comp specs so we know what we're dealing with:

MOBO: ECS P55H-A Black Edition
CPU: Intel i7 860
PSU: BFG 800W
Graphics Card: POWERCOLOR AX4870 (two of them)
OS: Vista Home Premium x64

I have everything hooked up properly and can verify both PCI-E slots are working and both video cards are working as I've tested them all separately. I'm using the latest CCC and drivers available.

I initially hooked up just one card, then loaded Windows and it detected it just fine, so I installed the drivers. Everything was just fine, so I shut down and installed the second GPU and hooked it up and attached both Crossfire bridges to the two cards. Nothing I have done since will cause the card to show up. I tried removing the bridges and rebooting also to no avail. Any help is appreciated, and I can give more details if necessary, just ask specifically please. Thanks in advance.

I should note that the first card works like a charm, but the second one is the card that will goes undetected.
 
Last edited:

My Computer

System One

Are both cards detected individually if you only use them one at a time in the first slot?
 

My Computer

System One

  • Manufacturer/Model
    Me
    CPU
    Athlon x2 7750 BE
    Motherboard
    Asus M4A78 Pro
    Memory
    2x2gb Kingston
    Graphics card(s)
    Sapphire HD 4830
    Sound Card
    X-Fi Xtreme Music
    Monitor(s) Displays
    Acer P221w and Acer 1916w
    Screen Resolution
    1680x1050 and 1440x900
    Hard Drives
    2x80 GB Seagate 7200.10 in RAID0, 500 GB Seagate 7200.12
    PSU
    Antec Earthwatts 500W
    Case
    Antec Sonata III
    Cooling
    AC Freezer 64 Pro and a couple of 120 mm case fans
    Mouse
    Logitech G5 v2
    Keyboard
    Logitech Wave
    Internet Speed
    10000/1000
This will sound ridiculous, but one person solved their problem by updating their onboard audio drivers.
 

My Computer

System One

  • Manufacturer/Model
    Custom
    CPU
    AMD AM2 6000+
    Motherboard
    Nvidia M2N-E SLI
    Graphics card(s)
    GeForce 7600GT
    Screen Resolution
    1280x1024
    Hard Drives
    WD
    Case
    Cooler Master
    Cooling
    Three fans
    Mouse
    Dell Optical
    Keyboard
    Dell Quietkey
    Internet Speed
    10 MBPS
Ridiculous as it may be, if that's what does the trick I'm willing to try it. I've been dealing with this for the past week including all evening tonight so I'll give this a shot first thing in the morning and report back. Thanks for the tip, fingers are crossed it works.
 

My Computer

System One

Well I loaded up RadarSync to check for possible new drivers and it appears all of mine are up to date, so I'm open to any other suggestions. I've got about 2 weeks left before this second card can't be returned so I do have a little bit of time to figure this one out. I just hope I don't have to end up with using only one card as I built the entire system around being able to handle two. Very frustrating situation to say the least!
 

My Computer

System One

Are there any settings in the bios to do with configuring it for Crossfire (would check myself, but ECS hasn't made the manual available yet)?

Also from reading a couple of reviews on the board there is a standard molex connector beside the first PCI-E slot that should be for providing extra power to the 2 PCI-E 16x when running Crossfire. You remember to plug it in?
 

My Computer

System One

  • Manufacturer/Model
    Me
    CPU
    Athlon x2 7750 BE
    Motherboard
    Asus M4A78 Pro
    Memory
    2x2gb Kingston
    Graphics card(s)
    Sapphire HD 4830
    Sound Card
    X-Fi Xtreme Music
    Monitor(s) Displays
    Acer P221w and Acer 1916w
    Screen Resolution
    1680x1050 and 1440x900
    Hard Drives
    2x80 GB Seagate 7200.10 in RAID0, 500 GB Seagate 7200.12
    PSU
    Antec Earthwatts 500W
    Case
    Antec Sonata III
    Cooling
    AC Freezer 64 Pro and a couple of 120 mm case fans
    Mouse
    Logitech G5 v2
    Keyboard
    Logitech Wave
    Internet Speed
    10000/1000
I read the manual from top to bottom, and aside from it saying it's CF compatible there were no other indications that a setting was available to turn this feature off or on.

I've got power running through the molex connector as well.
 

My Computer

System One

Well much to my surprise, I booted up earlier and Windows magically recognized my second card, and installed the appropriate drivers to boot! I did absolutely nothing to cause this change so my guess is as good as anyone else's as to what occurred. Thanks for all the help anyway in solving my problem. I will be sure to give +rep to everyone who replied in this thread, assuming it allows me to give out rep without receiving any.
 

My Computer

System One

That's great to hear. Good luck!
 

My Computer

System One

  • Manufacturer/Model
    Custom
    CPU
    AMD AM2 6000+
    Motherboard
    Nvidia M2N-E SLI
    Graphics card(s)
    GeForce 7600GT
    Screen Resolution
    1280x1024
    Hard Drives
    WD
    Case
    Cooler Master
    Cooling
    Three fans
    Mouse
    Dell Optical
    Keyboard
    Dell Quietkey
    Internet Speed
    10 MBPS
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