| video cards with 4 outputs I see that some 6770 & 7770 based video cards have 4 outputs, usually 2x DVI, 1x HDMI and 1x Displayport.
Are they all independent of each other? Meaning that in theory I could connect up to 4 monitors with a combined resolution of up to 7680 x 1200, for example.
TIA
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Da Man
join:2008-05-08
Hanover, PA | reply to aurgathor
One of the displays would have to use a VGA connection since there are only 2 TMDS controllers. |
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| said by Da Man:One of the displays would have to use a VGA connection since there are only 2 TMDS controllers.
This. Just to expand on it a bit, TMDS is used for HDMI and DVI, so you could have two DVI, one HDMI/one DVI, etc. If DisplayPort 1.2 MST hubs were around, you could have gone down that route with a 7770 and some DP monitors.
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KI6RIT |
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Yes, I do know that both DVI & HDMI use TMDS, but didn't know the cards come with only two. 
From »www.amd.com/us/products/technolo···aqs.aspx I got the following:
quote:
What are the basic requirements for connecting multiple displays?
Connecting multiple monitors for AMD Eyefinity technology couldn’t be simpler. There are four easy rules to remember:
1.The first two monitors can connect to the graphics card with any display output on your product: HDMI, VGA, DVI or DisplayPort.
2.The third (or greater) display must be connected to the graphics card via DisplayPort.
3.If your monitor does not have a DisplayPort connection, you will need an inexpensive active DisplayPort adapter for it. DVI to DP adapters can be had for less than $30 USD.
4.Every family of GPUs supports a different maximum number of displays.
The above quote seem to imply that unless I get that MST hub (currently made of unobtainium) I'm limited to 3 monitors total, even though one monitor would have to be VGA (I have 3 PCs hooked up to a VGA KVM and they all share a 1920x1200 monitor). I have several 19" monitors with VGA/DVI, but only one with DP. (and due to the KVM, I use that monitor via VGA  )
I wonder if using one DVI with a VGA adapter (as commented above) would allow me to use the other DVI and the HDMI port -- that contradicts with AMD's FAQ, but they may just left some of the finer details out.
I searched for cards that has 2xDVI, 1xHDMI, 2xDP, but only some 6850 or better and some 7850 or better cards have that configuration -- but due to power consumption, I don't want to get anything 'better' than 6770 or 7770.
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| reply to aurgathor
Nvidia does 3+1
But for single gpu. you will need GTX670 and up.
»www.geforce.com/hardware/technol···irements
I pick 2D Surround.
quote:
GeForce GTX 670 Single GPU With 2D Surround(Landscape)
> Orientation: Landscape
> Accessory Display: Yes, no additional GPU
> Maximum Resolution: 7600x1600
> Maximum Resolution (Bezel Correction): 8192x1600
> Maximum number of displays: 3 in Surround
1 Accessory Display
special Instructions:
> Any connectors can be used to enable Surround.
> Once Surround is enabled, users can use
any connector for the Accessory Display.
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3 edits | reply to aurgathor
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 OctaveanPremium,MVM
join:2001-03-31
New York, NY
kudos:1 | reply to aurgathor
Yeah, I was going to say that I have an HD 6870 with four outputs. DVI (DL), DVI ( SL), HDMI, mini DisplayPort and mini DisplayPort. I'm running a triple 27" setup off it ( DVI, HDMI, Mini DisplayPort) but I believe it'll do four. |
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| reply to aurgathor
If you get active DisplayPort adapters, it gets around the problem. They've come down a lot in price from a year or so ago. Here's one.
A few months ago, I found a really neat single-slot 6770 on Newegg that had 5 mini DisplayPort outputs. It's discontinued on there, but can be found elsewhere online.
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KI6RIT |
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| Hmmm, a somewhat pricey, but rather interesting card. Tried to look on XFX's site if they have a newer version -- however, it's the *worst* product page I've ever seen -- I have no idea what their web designers are doing, but I'd fire them on the spot.
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| reply to norwegian
As I've already mentioned, high end cards are out of question:
a) I don't do any gaming -- so the extra horse power would get wasted
b) I don't want to pay the extra for a high-end video cards
c) I don't want to pay for the extra electricity either
d) the PC has only one 6 pin connector (though I could probably use a Y-adapter)
e) the PS could be borderline for high-end cards
For the above reasons, 7770 or a comparable card is the absolute max, and the most preferred configuration would be: 2x DVI, 1x HDMI, 2x DP.
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| Just as an FYI, newer cards sip power when idle, even the high-end ones. I had around a 70-80w decrease in idle power usage when upgrading from my Radeon HD4870 to my 6970, and the 7750 and up use even less when on extended idle. I know it doesn't help with your situation much, but I just wanted to throw that out there for others  .
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1 edit | reply to aurgathor
Seems a lot of them are out of stock.
These did pop up, however I'm not sure on the Galaxy item, it doesn't sound 4 monitor, but 2 extended monitor design. The bottom is a vga card. Didn't think all the cards I'd seen of late would be out of stock....timing I guess.
»www.newegg.com/Product/Product.a···14129172
»www.newegg.com/Product/Product.a···14162083
»www.newegg.com/Product/Product.a···14139055
»www.newegg.com/Product/Product.a···4139037R
On another note, wouldn't just supplementation with an Active DisplayPort Adapter get you on all 4 ports of 50% cards without looking over my unusual list?
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| reply to aurgathor
This one looks interesting:
KFA2 MDTX4 - GeForce GT 610 1GB DDR3
»www.kfa2.com/MDTX4610.shtml
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| reply to aurgathor
said by aurgathor:.......and the most preferred configuration would be: 2x DVI, 1x HDMI, 2x DP.
For all of the cards with this configuration they were either too expensive, had 2 power plug needs or were out of stock.
Sorry I could not find 1 card in stock of this configuration that suited your needs. This close to Xmas, I'm surprised at the "All out of stock" for the type of cards you are after.
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| reply to norwegian
Neat card . I think that brand isn't sold in the US though, so it would have to be purchased from an overseas reseller.
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| There are 4 there with DDR5 ram if required, 2 on 560 and 2 on 680 gpus. Quite interesting. The 1 I posted seems a mix of all worlds; I've not seen them previously either and considering the lack of decent supply at present I'd be happy with an overseas purchase of a card like these for multi screen; Nvidia too which is a bonus, as I'd prefer to stay away from ATI/AMD personally - no real reason, I seem to have more fun with Nvidia over AMD/ATI drivers.
As for aurgathor  's needs I'm not sure. You can only but try.
Side note:
I wonder if card like this or the more serious workstation cards form Nvidia and physX off a second card would perform if the software was CAD or something similar scientific wise. There is certainly some power out there if you have the cash and needs.
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The only thing necessary for the triumph of evil is for good men to do nothing - Edmund Burke
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1 edit | reply to aurgathor
Thanks for all for the suggestions -- at the end I decided to modify my requirement slightly: 2xDVI, 1x HDMI and 1x DP -- and there were many hits for this one. I decided to go with the XFX CORE Edition FX-777A-ZNF4 Radeon HD 7770 GHz Edition mostly because it was the cheapest of many similar cards ($100 after MIR) The other finalist was the 5 DP XFX , but the GPU was a generation older, plus I would've needed 3 adapters, so the total cost would've been almost twice as much. (but I would've gotten this if it had a 7770).
Since I'll be using one of the DVI connector with a DVI to VGA adapter, I should be able to test if I can use 2x DVI and 1x HDMI concurrently.
I presume that we'll see a lot more 'lower end' cards with all (or mostly) DP connectors within a couple of years, so there should be a next time with a newer GPU.
Edit: fixed link -- it's an XFX, not a Saphire
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| said by aurgathor:Since I'll be using one of the DVI connector with a DVI to VGA adapter, I should be able to test if I can use 2x DVI and 1x HDMI concurrently.
I think you will find 1 of those ports will need an Active DisplayPort Adapter to have them all working. There was a discussion here a while back with a 3 screen setup - not sure though.
Here's a couple of links in case you need to trouble shoot.
»Building 4-monitor system; Need motherboard/video pointers
»How Run Three Monitors? Win 7
»Building 4-monitor system; Need motherboard/video pointers
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| As per AMD's FAQ (quoted above) this card should allow me to have 3 monitors -- 2x DVI and 1x DP, no buts, ifs or maybes. 4 is rather doubtful, but I can't lose anything by trying.
I have probably over a dozen PCI video cards, so I can use one of those for that 4th video. As a matter of fact, I have 3 or 4 dual video PCI cards (they may not work with XP or later, however, in dual video mode since they're from the Win9x / NT 4.0 era )
In any case, this is what AMD GPUs can support, but with a few exceptions I don't think many actual cards support the maximum possible number of displays: quote:
Up to 6 displays
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AMD Radeon™ HD 7900 Series
AMD Radeon™ HD 7800 Series
AMD Radeon™ HD 7700 Series
AMD Radeon™ HD 6900 Series
AMD Radeon™ HD 6900M Series
AMD Radeon™ HD 6800 Series
AMD Radeon™ HD 6800M Series
AMD Radeon™ HD 6700M Series
AMD Radeon™ HD 6600M Series
AMD Radeon™ HD 6500M Series
ATI Radeon™ HD 5800 Series
Up to 5 displays
============
AMD Radeon™ HD 6700 Series
ATI Radeon™ HD 5700 Series
Up to 4 displays
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AMD Radeon™ HD 6600 Series
AMD Radeon™ HD 6500 Series
AMD Radeon™ HD 6400M Series
AMD Radeon™ HD 6300M Series
Up to 3 displays
============
AMD Radeon™ HD 6400 Series
ATI Radeon™ HD 5600 Series
ATI Radeon™ HD 5500 Series
ATI Radeon™ H
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