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How to setup Eyefinity with a Direct CUII 7970?

post #1 of 6
Thread Starter 
Hiya everyone, recently I came into money and have decided to scrap my crossfire 6870s for a 7970 and two more monitors for a eyefinity setup. The problem though, if how I'm going to go about doing this. The two monitors I'm purchasing have HDMI ports, as does my current monitor. What I'm thinking of doing is using the DVI to HDMI converter that comes with the card, and then attaching a 6ft HDMI cable from the converter to one monitor. From there I would run a DVI to HDMI 6ft cable to the second monitor. And finally I would run a 10ft Displayport to DVI cable to the final monitor. I would use a display port to HDMI but they dont have a ten footer at Memory Express's online store. So, would this work, yes, no, if so, why not?
post #2 of 6
Quote:
Originally Posted by Ltholt25 View Post

Hiya everyone, recently I came into money and have decided to scrap my crossfire 6870s for a 7970 and two more monitors for a eyefinity setup. The problem though, if how I'm going to go about doing this. The two monitors I'm purchasing have HDMI ports, as does my current monitor. What I'm thinking of doing is using the DVI to HDMI converter that comes with the card, and then attaching a 6ft HDMI cable from the converter to one monitor. From there I would run a DVI to HDMI 6ft cable to the second monitor. And finally I would run a 10ft Displayport to DVI cable to the final monitor. I would use a display port to HDMI but they dont have a ten footer at Memory Express's online store. So, would this work, yes, no, if so, why not?

Eyefinity requires that 1 of the displays use the Display Port. You can have a combinations of (2) DVI or (1) DVI and (1) HDMI display, but the 3rd MUST use the display port. The only work around to this is buying a display port to DVI active converter


and I run x2 6870's do you notice a difference in FPS?


here is how to set it up
http://www.amd-news.com/assets/files/amd-cn/Eyefinity_SetupGuide_v1_AMD.pdf
post #3 of 6
Thread Starter 
I was under the impression that the 7000 series cards didnt need an active DP adapter? if they do, could you shoot me a link to one, and explain the concept to me? Im sort of new to this frown.gif As far as the difference in framerate, I havent the slightest idea yet, looking to buy the cards, cables and monitor in one fell swoop
post #4 of 6
Quote:
Originally Posted by Ltholt25 View Post

I was under the impression that the 7000 series cards didnt need an active DP adapter? if they do, could you shoot me a link to one, and explain the concept to me? Im sort of new to this frown.gif As far as the difference in framerate, I havent the slightest idea yet, looking to buy the cards, cables and monitor in one fell swoop


here is a nice one right here

DisplayPort is the first display interface to rely on packetized data transmission, a form of digital communication found in other technologies like Ethernet, USB, and PCI Express. It allows both internal and external display connections, and unlike legacy standards where differential pairs are fixed to transmitting a clock signal with each output, the DisplayPort protocol is based on small data packets known as micro packets which can embed the clock signal within the data stream. The advantage is a lower number of pins to achieve higher resolutions.[8] The use of data packets also allows for DisplayPort to be extensible, meaning additional features can be added over time without significant changes to the physical interface itself.[9]

DisplayPort can be used to transmit audio and video simultaneously, but each one is optional and can be transmitted without the other. The video signal path can have 6 to 16 bits per color channel, and the audio path can have up to 8 channels of 24 bit 192 kHz uncompressed PCM audio which can encapsulate compressed audio formats in the audio stream.[2] A bi-directional, half-duplex auxiliary channel carries device management and device control data for the Main Link, such as VESA EDID, MCCS, and DPMS standards. In addition, the interface is capable of carrying bi-directional USB signals.[10]

The DisplayPort signal is not compatible with DVI or HDMI. However, dual-mode DisplayPorts (marked with a ++DP logo) are designed to transmit a single-link DVI or HDMI protocol across the interface through the use of an external passive adapter that selects the desired signal and converts the electrical signalling from LVDS to TMDS. VGA and dual-link DVI, on the other hand, require active adapters to convert the protocol and signal to the desired output and do not require dual-mode DisplayPorts. VGA adapters are powered by the DisplayPort connector, while dual-link DVI adapters may rely on an external power source (see compatibility with HDMI, DVI and VGA).[11]

The DisplayPort connector can have 1, 2, or 4 differential data pairs (lanes) in a Main Link, each with a raw bit rate of 1.62, 2.7, or 5.4 Gbit/s per lane with self-clock running at 162, 270, or 540 MHz. Data is 8b/10b encoded where each 8 bits of information are encoded with a 10 bit symbol. So the effective data rates after decoding are 1.296, 2.16, and 4.32 Gbit/s per lane (or 80% of the total).
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