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Triple Monitor Setup not working on Sapphire

Posted on 2009-04-05
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Last Modified: 2012-05-06
I am trying to get a triple monitor setup running on my Dell 9100.   I read up on the previous posts and got 2 graphics cards from the same manufacturer.   One is a Sapphire Radeon HD 3650 with dual DV ouputs running in the PCI-E x16 slot.   The second is a Sapphire 7000 / 7000 VE with a DVI and VGA connection.   I have 3 Dell 2405 FPW monitors.   The Sapphire HD 3650 replaced the ATI video card that came standard on the Dell 9100.

I installed the 3650 and installed the latest drivers from Sapphire.  The card works and I can get the dual monitors working just fine.   Works just like the previous Dell card when one monitor was on DVI and the other on VGA.  

I shutdown and installed the 7000 card.   The dual monitors loaded and I logged in.  After logging in got the prompt about finding new hardware.   Just allowed the system to run until it told me to reboot.   I rebooted.

When the system rebooted only the 3rd monitor works.   The monitor on the 7000 card is the only one that responds.   The dual displays on the 3650 are black.   System properties only shows one monitor available.

I shutdown, removed the 7000 card, and rebooted.   After login I had to reinstall the drivers to get the 3650 to work in dual monitor mode.   I can only get this to work with 2 monitors on a single card.   I can't get monitors to work across 2 cards.

What am I doing wrong... help...   Attaching the outpu from dxdiag
DxDiag.txt
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Question by:jondrejik
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Expert Comment

by:jamietoner
ID: 24072548
Check the bios and set Pci-express(peg) as the default video device.
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by:garycase
garycase earned 500 total points
ID: 24072685
The Radeon 7000 and HD 3650 use different drivers [On the ATI site, they show the current driver for a 7000 is v6.11, while the 3650 uses v9.3;  on the Sapphire site they show v6.5 for the 7000, and 9.3 for the 3650].

Since you're using XP, you MAY be able to install the drivers in the reverse order (the 7000 first; then the HD 3650] and get it to work -- but that doesn't always work (it depends on the specific cards and driver versions).   Note that with Vista it REQUIRES that multiple cards use the same unified driver ... so this would definitely NOT work under Vista.

The best solution is to use cards that use the same unified driver.   For example, here's a PCI version of the HD 2400 Pro that uses the same v9.3 drivers as your HD 3650:  http://www.newegg.com/Product/Product.aspx?Item=N82E16814131082   This should work with no issues; and has the added advantage that it will work with Vista, Windows 7, etc.
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jondrejik earned 0 total points
ID: 24119106
thanks was able to get it to work.   I had to uninstall all the video drivers and then install the oldest one first.   Once I did that and rebooted I installed the newer card which just happened to be the one that came with the system.  XP loaded all the drivers and ti works!!

Now I can return the card I just purchased and same some $.  

The idea of installing the drivers in reverse order from garycase was the clue I needed to get it to work.
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