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11-03-2012, 12:11 AM
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#1
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Junior Member
Join Date: Nov 2012
Location: Warbuton, Victoria, Australia
Posts: 3
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Triple Screen Help!
Hi guys
I recently purchased an AMD Gigabyte 2GB HD7750 graphics card and it has four outputs, but i cannot seem to triple screen, the computer (running Win 7 Ultimate) recognizes the monitor and can switch to it but not extend the screen to it, this is quite annoying, and eyefinity in the control center does not help. The card has 2 DVI 1 VGA and 1 HDMI but i only have VGA and DVI capable monitors.
Please help
Symon
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11-03-2012, 12:36 AM
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#2
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Senior Member
Join Date: Dec 2007
Posts: 516
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That's very strange, does your card have DP? IIRC all Southern Island cards can only do 2 TMDS displays (VGA, DVI, HDMI), so displayport is needed for a third display.
__________________
Corei7 920@3.70GHz, 1.28V, TRUE with 1x120mm fan.
Sapphire 7970 Dual-X (not GHz edition  )
6*2GB DDR3-1333 , 9/9/9/24, 1.5V
Gigabyte GA-EX58-DS4
Dell U2711 + HP LP2475
Intel SSD 520 180GB
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11-03-2012, 12:42 AM
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#3
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Diamond Member
Join Date: Feb 2010
Location: New York City
Posts: 3,564
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I think you need to buy a DP to DVI or VGA adapter to get 3 monitors working.
__________________
i7 2600k @ 4.6 ghz with XSPC Rasa - Sapphire HD 7970 @ 1200/1400 with Koolance Full Cover Block - 12GB DDR3 1600 G.Skill Ripjaws RAM - SilverStone RV03 - NZXT Hale90 750W PSU -MSI P67A-GD65 - 1TB Samsung HDD - OCZ Solid II 120 GB
Heatware: badboydiablo 22-0-0
Quote:
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Originally Posted by Neil deGrasse Tyson
God is an ever-receding pocket of scientific ignorance.
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11-03-2012, 01:17 AM
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#4
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Junior Member
Join Date: Nov 2012
Location: Warbuton, Victoria, Australia
Posts: 3
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Quote:
Originally Posted by palladium
That's very strange, does your card have DP? IIRC all Southern Island cards can only do 2 TMDS displays (VGA, DVI, HDMI), so displayport is needed for a third display.
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No the card does not have a DP i have already looked and should have mentioned that before
Symon
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11-03-2012, 02:15 AM
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#5
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Diamond Member
Join Date: Feb 2011
Posts: 3,552
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Quote:
Originally Posted by Helix42
No the card does not have a DP i have already looked and should have mentioned that before
Symon
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Uh oh.
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11-03-2012, 03:34 AM
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#6
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Senior Member
Join Date: Dec 2007
Posts: 516
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What's the rest of your system? If you have an IGP you may be able to use it to drive your third display.
__________________
Corei7 920@3.70GHz, 1.28V, TRUE with 1x120mm fan.
Sapphire 7970 Dual-X (not GHz edition )
6*2GB DDR3-1333 , 9/9/9/24, 1.5V
Gigabyte GA-EX58-DS4
Dell U2711 + HP LP2475
Intel SSD 520 180GB
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11-03-2012, 03:58 AM
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#7
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Platinum Member
Join Date: Jan 2005
Location: San Jose, CA
Posts: 2,179
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So far as I've heard all higher-end ATI cards support 3 or more digital displays but only two DVI's max, one or more must be DisplayPort. I could be wrong.
__________________
i7 2600K@4.35 GHz, Asus Sabertooth Z77, 16 GB Corsair Vengeance DDR3-1600 9-9-9-24-1T 1.5V, Samsung 840 Pro 256GB SSD  , 2x1TB Spinpoint F3 Raid 0, Seagate 3TB external USB3 drive, Samsung BluRay, Corsair GS600, CM Hyper 212+ push-pull, EVGA GTX 570, 2x Samsung 2333T PVA panels, Win 7 64-bit
What's that chip you got, a Dorito?
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11-03-2012, 04:40 AM
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#8
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Junior Member
Join Date: Nov 2012
Location: Warbuton, Victoria, Australia
Posts: 3
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I have the motherboard from a dell vostro 200 and its a vga and i can have any combo of 2 of the three outputs at once but otherwise it wont work
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11-03-2012, 09:49 AM
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#9
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Golden Member
Join Date: Dec 2010
Posts: 1,529
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A vendor can select which outputs to support. So even though the GPU chip may support triple monitor when using a displayport, the vendor may not have put the corresponding circuitry onto the video card's board.
So your card probably is missing the displayport circuitry and output port.
Is this your card? If so, it only has DDR3 memory (slower than DDR5) and lacks a displayport output so is limited to 2 simultaneous displays. The vendor could have used DDR5 and displayport, but omitted them to provide a more affordable card:
http://www.gigabyte.com/products/pro...px?pid=4345#ov
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