Cannot get Eyefinity to work past 3 monitor

[Major Sirius]

I have been attempting to get this problem resolved off and on for quite some time now. I am using a MSI R5870 Eyefinity 6 - 2 GB card. Recently I upgraded 2 of my monitors so that all of them are displayport monitors. I have 4 x NEC EA231WMi and 2 x NEC E231W. They are all connected directly via mini-DP to DP cables (no adapters are used). These are simply single cables running directly from the video card to the monitor.

Yet, I can only get up to 3 monitors to run in Eyefinity. I have been successful in getting Eyefinity to run in 3x1 configs on either the upper or lower rows (I have the monitors setup in a 3x2) array.

I need assistance in getting all 6 screens running in a 3x2 config. I am at such a loss of how to get this to work. Nothing I have tried in the past seems to have worked. I have tried the 10.10 drivers and the most recent 11.6 drivers. No luck! Every time I try to setup a 3x2 setup I see either nothing happen, or the display will change to a different monitor, but with nothing else changed.

Is it possible that the cables are bad? Tell me if these are not correct: I have 3 x 6ft 32AWG DisplayPort to Mini DisplayPort Cable - White (http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10246&cs_id=1024606&p_id=6007&seq=1&format=2) and 3 x 10FT 32AWG DisplayPort to Mini DisplayPort Cable (http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10246&cs_id=1024606&p_id=6008&seq=1&format=2). Are they too long? Or are the specs just wrong? If so, what do I need?

My system info is as follows:
OS Name Microsoft Windows 7 Professional
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name System
System Manufacturer Gigabyte Technology Co., Ltd.
System Model GA-790XTA-UD4
System Type x64-based PC
Processor AMD Phenom(tm) II X4 965 Processor, 3400 Mhz, 4 Core(s), 4 Logical Processor(s)
BIOS Version/Date Award Software International, Inc. F4a, 7/2/2010
SMBIOS Version 2.4
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume2
Locale United States
Hardware Abstraction Layer Version = "6.1.7601.17514"
User Name Lightning\username
Time Zone Eastern Daylight Time
Installed Physical Memory (RAM) 8.00 GB
Total Physical Memory 8.00 GB
Available Physical Memory 5.37 GB
Total Virtual Memory 16.0 GB
Available Virtual Memory 12.3 GB
Page File Space 8.00 GB
Page File C:\pagefile.sys

Also, the power supply is a Corsair Enthusiast Series TX950 (CMPSU-950TX); the heat sink is a Corsair H70, the operating system is Windows 7 professional 64-bit.

Thanks!

 

[e-geek]

Just curious but you say you can get either the upper 3 or lower 3 screens working, so seeing as you have 3 of each type of cable you listed do say the top 3 screens use all 6ft and bottom 3 all 10ft dp cables? (or vice versa with the length, doesn't matter)

If so then i would get all the same cable or at least 1 more of 1 type to see if you can get 4 screens going with it, only thing that seems to stick out to me sorry.

 

[Major Sirius]

The cables are not easily traceable at the moment. However, if I recall correctly, since I have my desktop on the floor under my desk to the right side I use the longer cables for the left-most monitors with another 10 ft cable on one of the center monitors.

 

[Monoprice]

Hi Major Sirius,

I see that you are having issues with eyefinity, have you by chance tried this with a different set of monitors? I have heard there are issues with specific NEC monitors and our displayport cables. I am also trying to figure out what might be causing. Please let me know of your findings my email is below. Thank you!

John Lingo
[email protected]
Tech Support

 

[e-geek]

Well at least they seem to care about your issue

 

[der_jackal]

You might be hitting this;

Q: Why isn’t there a wire on pin 20 (POWER) on the standard external DisplayPort cables?
A: The reason power isn't included in standard cables is because both source and sink devices are designed to provide power. Captive, attached cables often include the power wire. If it is desired, for example, that a particular source device utilize the power available from the mating sink device, then that Source device could include an attached or dedicated cable that carries the DisplayPort power signal. Same could be applied to a sink device.

There were a few people reporting that monoPrice cables are pinned to provide power and that was thunking NEC monitors. See if the 20pin is there on those cables.

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