I’ve got a gtx 670 in my tower, IIRC, which can probably handle 3 hd monitors ? not sure. I want 4-5 hd outputs.
I thought I heard rumblings that multiple gtx cards are not kosher. What is the best way to do this? Do I need to step up to Quadro for more than one card ? All the stuff about SLI/mosaic I’m not sure about what works/what doesnt work.
multple gtx cards?
multiple quadro?
another solution?
from what I gather most of the gaming cards top out at about 5k resolution.
2 GTX 670s has worked great for me in the past. 780s are way better.
4 outputs out of one is just fine and you should be able to run all 8 out of 2 cards. If you play with Aero and Sync settings you can get tear free playback but you will probably always see dropped frames here and there.
Weather or not you need frame accurate playback will dictate weather you actually need Quadro cards. In that case you will also need a Quadro G-Sync Card. Its more expensive and slower in general but when super smooth playback is a necessity, its really the only solution.
thanks, very helpful to point me towards those links.
re: the dual gtx670’s - does this require 2 pciexpress*16 slots or can the second one be *8 ? I’d like to know the specs of the motherboard that you were using. I think only one of my slots is full *16, but I’m not sure that it matters that they all are.
You can also use video splitters like Matrox Triple Heads or Datapath X4’s. Triple Heads are pretty cheap these days comparatively. Although you would run into the same problems that matthewwachter mentioned of tearing vs dropped frames, at which point you’d need to go the quadro route. But I’ve seen setups running multiple X4’s on a single quadro to get a ton of outputs.
I actually have access to several tripleheads and I suppose I should obtain them and see where this single card can max out with them. They are nice to have, once you get them locked in and settled on your particular project. Configuring them is a PITA
The gtx 670 has a max resolution of 4096x2160 according to nvidia. By total pixel count I don’t see how that could physically be more than (4) 1080p monitors per card. I will try them out though, out of curiosity.
I don’t know if these calcs are proper, but :
4096*2160= 8847360 px
1920*1080= 2073600 px
8847360/2073600 = 4.2 HD monitors
it looks like a quadro k2000 tops out at the same resolution.
the way I calculate it I need at least 2 cards for more than 4 HD outputs, but if I went down to 1600x900 per output I should be able to have 6 HD outputs on one card with 1 triplehead and all 4 of my digital outputs… back to the lab!
You’ll figure it out quickly by just plugging everything in. I’d also recommend using the same signal path for all your outputs. If you have a handful of outputs on the triple heads, send them all through triple heads.
Ignore those output limits stated in the Nvidia sales spec sheet. The only limits to the output of the card is the limits of the connectors you are using. For example a DVI-D can do ~2200x2200 at 60fps. Double that if you are running at 30hz on the monitor.
Display port can do even higher resolutions.
The limit is per connector also, not for the entire card.
Processing power to create content for those pixels is another thing, and entirely dependent on how many TOPs you are using.
Hey guys,
Another thing to consider here are the DVI cables themselves. 2200x2200 @ 60 can be run on a DVI-D or a DVI-I cable (although your output connector is DVI-D only). Regardless, you will need a Dual Link DVI cable to support the bandwidth of 2200x2200 @ 60.
DVI Bandwidth
Single Link: 165 MHz
Dual Link: 330 Mhz
2200x2200@60: 290 Mhz
Another PITA to consider are Active DP adapters for the DP outputs to achieve high bandwidth outputs to a TH2Go. That may be a topic for another thread though.
I’m waiting for and extra monitor to arrive so that I might experiment with Plugable’s usb3.0 to dvi . I’m going to try and run 7 pico projectors with these… I’ll let you know how it goes:)
this is a naiive guess, but I think that will be problematic to go out the USB -I don’t think you will be able to utilize GPU power, which is the foundation of TD.
But I am looking forward to hearing what your tests say!
When the adapter is connected to your PC, graphics processing is still handled by your computer’s central processor and graphics processor. The USB graphic adapter’s DisplayLink drivers on the PC compress and transmit pixels to the USB adapter as pixels are updated. The adapter’s DisplayLink DL-3100 chipset decodes the data and displays it.
I used GTX 650 TI DVI → VGA adapter out to an old monitor at 1440 x 900. A WPCTVPRO was connected to a Samsung 1080p HDMI wirelessly through a usb 2 adapter. I got lucky and picked that part up for 30 bux at bestbuy. Lastly was a Optima PK320 running at 720p(its max) through usb 3 to dvi from plugable, it came with adapters for DVI to VGA or HDMI, SWEET !
Neither, that was just a short test. I just right click…view then just dragged the window on to the display and fullscreened it. I had all the different displays set up with different resolutions in MSWINDOWS display properties. They are all plugged in to their own display outputs(DVI, USB2, USB3), not off a multi-head signal splitter like a Matox. I imagine when I continue to work with this hardware setup I will use seperate window comps. Also, I am going to try to push the maximum of 6 USB 3.0 driven pico projectors in the future as I cannot afford all the costs of this project up front (already $5000 in, and I’m only half way done with hardware experiments and constructions… ).
That might be in part why your performance was low. Try using only 1 window comp that spans across all the displays. Match all the resolutions of the displays if possible, using whatever common resolution they have, then have 1 giant window comp set to the size of all of them, however you have them ordered in the windows screen resolution settings. You might actually be able to hold 60fps like that.
I was just showing different methods of extending your displays without a signal multi head. I won’t be using 1080p wireless usb2.0 HDMI extender, that was just something I had laying around the house. I plan on using 6 pico projectors (looking towards macrovision laser based OEM module kits) set close to 720p. When I get that far, I will try using one extended window comp. BUT FOR NOW, I’m just waiting on paychecks to buy more hardware.
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