Some time ago I bought ATI 5750 Eyefinity edition to use with 3 computer displays. The problem was, that it is impossible to use 3rd monitor with ‘passive DisplayPort to DVI cable’.
The solution for me was to use second video card, which led to another problem / error – The color scheme has been changed to Windows 7 Basic.
Yesterday I solved both problems by buying a new HP ZR24w 24-inch LCD Monitor with 3 inputs – VGA, DVI-D and DisplayPort and 5 USB 2.0. It is an expensive monitor (~600 USD including VAT), but monitor has nice ‘Pivot rotation’ feature and Native resolution 1920 x 1200.
So my new setup:
- LG 37″ LCD TV Full HD – using hdmi – hdmi cable
- HP 24″ LCD 1200×1920 – using DisplayPort – DisplayPort cable
- Samsung 19″ LCD – using DVI – VGA (D-sub) – VGA cable
My old Samsung 22″ LCD 1680×1050 goes to 2 monitor setup – 46 inch Samsung LE46B55 + Samsung 22″. This setup runs on two EVGA GTX470 cards in SLI mode.
Today I bought ATI 5750 Eyefinity edition. I wanted to enable 3 monitors with one video card as advertised. My setup:
- LG 37″ LCD TV Full HD – using hdmi – hdmi or DVI – hdmi cables
- Samsung 22″ LCD 1680×1050 – using DVI – DVI cable
- Old Samsung 19″ LCD – using DVI – VGA (D-sub) – VGA cable
Under Screen resolution (Windows 7 Ultimate), trying to add 3rd display (extend desktop to this display), it always shows the following error window:
Unable to save display settings.
I can enable any 2 monitors, but when I try to add third, it shows the same error. Some people have reported, that they have successfully enabled third display (for example Jeff Atwood from codinghorror). The thing is, that I have passive DisplayPort to DVI cable, but Jeff has Active DisplayPort to DVI, that cost $110. That’s insane! I can buy multiple ATI 3450 cards for that price and build at least 3+ monitor setup.
Now I am going to add one of my old ATI cards to existing setup, to fix this broken Eyefinity thing.
P.S. Also, I have strange issue with HDMI – HDMI cable when connected to LG LCD TV. With this cable I am unable to get satisfactory image (always black bars / borders and blurry fonts), so I am using DVI – HDMI cable. Some folks in ATI forums also have reported issues with HDMI – HDMI cables.
Update (thanks to Bill, July 12, 2010).
A maximum of 2 legacy monitors (VGA, DVI or HDMI) can be enabled simultaneously, provided that each monitor is connected either directly or via a “passive” DisplayPort adapter/dongle. “Passive” adapters/dongles will NOT support more than 2 legacy monitors.
ATI / AMD support site