• eyefinity with two DVI screens and one HDMI screen?
    12 replies, posted
I heard the third screen needs to be native displayport, but will HDMI work?
if you convert it to DVI (through a $2 adapter) yes it will [editline]6th November 2010[/editline] [url]http://www.dealextreme.com/details.dx/sku.709[/url]
as in, two screens occupy the DVI ports on my gfx card and the third screen uses the HDMI port, which is then made into DVI which connects to the screen?
[url]http://www.dealextreme.com/details.dx/sku.8308[/url] if you plan on needing to use dual link DVI (for high res screens above 1080p)
AFAIK only 2 of the non-displayport ports can be used at the same time. So you'll pretty much need a displayport adapter.
no, you have to use the displayport. hdmi won't work. [editline]6th November 2010[/editline] also the displayport adapter has to be an active adapter not passive
[QUOTE=FlashStock;25893101]no, you have to use the displayport. hdmi won't work. [editline]6th November 2010[/editline] also [b]the displayport adapter has to be an active adapter not passive[/b][/QUOTE] meaning?
"It’s important to remember that it’s not just the form factor (physical shape) of the DisplayPort (DP) and DVI connectors that are different, the electrical display signal is very different as well. Passive adapters contain nothing but connectors and cables. They do not change the electrical format of the signal in any way. A large number of applications and games will work with Sapphire ATI Eyefinity technology, some of them are listed here. Assassins Creed, Age of Conan, Batilefield 2142, Batileforge, Call of Duty 4 Modern Warfare, Call of Juarez: Bound in Blood, Crysis , DiRT 2, Half-Life 2, Harry Potier Half Blood Prince, Star Wars Batilefront, Tom Clancy's H.A.W.X…….and many more. For a list of validated and ready to use soware, visit [url]http://support.amd.com/us/eyefinity/Pages/eyefinity-software.aspx[/url] In the case of Eyefinity across three monitors, all of the possible DVI signals are used up on the other two DVI or HDMI (HDMI video signals are the same as DVI signals) outputs so the board can only output a DP signal from the DP connector. Passing this signal to a DVI monitor (by using a passive adapter) will not work as the DVI monitor will not be able to interpret and decode the DP signal to create a picture. Sapphire Active DisplayPort to DVI Adapter changes the connector form factor and corrects electrical signal to the third DVI monitor"
Okay but my 5870 has two DVI, one HDMI and one displayport. Does the above mean I can only have two DVI signals out and thus am forced to use the displayport as HDMI counts as a dvi signal?
[QUOTE=Nilrus;25899872]Okay but my 5870 has two DVI, one HDMI and one displayport. Does the above mean I can only have two DVI signals out and thus am forced to use the displayport as HDMI counts as a dvi signal?[/QUOTE] yes the 5870 also has 2 RAMDACs, so you have to choose between using 2 DVI + 1 DP or 1 DVI 1 HDMI + 1 DP. DP doesn't need a RAMDAC so that's why 3 monitors work. "Additional info: It seems the 5000 series cards have two RAMDACs so they can only output two signals that require a RAMDAC. A native DisplayPort signal does not require a RAMDAC. Because of the two RAMDAC limitation, the only way to get three monitors is to use a native DisplayPort signal because it doesn't require a RAMDAC. Passive converters DO NOT convert native DisplayPort signals and THEREFORE REQUIRE the use of a RAMDAC. Because only 2 RAMDACs are available, a passive adapter, which requires another RAMDAC, won't work for 3 monitor setups."
[QUOTE=FlashStock;25899903]yes[/QUOTE] mmkay Thanks very much for the help.
[QUOTE=FlashStock;25899903]yes the 5870 also has 2 RAMDACs, so you have to choose between using 2 DVI + 1 DP or 1 DVI 1 HDMI + 1 DP. DP doesn't need a RAMDAC so that's why 3 monitors work.[/QUOTE] Isn't RAMDAC a digital to analog converter, i.e. it's used for analog output?
[QUOTE=pebkac;25902882]Isn't RAMDAC a digital to analog converter, i.e. it's used for analog output?[/QUOTE] "They are used to generated the timing signals required for centered display techologies, like HDMI and DVI, and to perform digital to analogue conversion for VGA output." [img]http://img227.imageshack.us/img227/4110/seinfeld.jpg[/img]
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