i bought 3 new full hd asus monitors yesterday. so i wanted to connect them up via my SAPPHIRE Dual-X R7 265 but when i want to display tree monitors it says "can't save display settings" i have on my gpu a dvi port a hdmi and a displayport al those r connect en converted via a stander dvi to hdmi and hdmi to hdmi and a displayport to hdmi. but is does not work im only allowed to use 2 of 3 monitors at the same time. i think by my self is has something to do whit the cable from my display port. but can someone help my ?
Eyefinity requires atleast one monitor to be a pure DisplayPort connection from the GPU to the monitor, the rest can be anything or in your case HDMI and DVI. If one isn't DisplayPort then you can use 2 monitors maximum.
What do you mean by two other GPUs? You can keep the HDMI adapter for DVI, HDMI uses HDMI so that's it and all you need is a DisplayPort cable to connect from DisplayPort on graphics card to DisplayPort on monitor. You keep everything and only change DisplayPort.
When you say GPU it means a graphics card and you don't need to buy more graphics cards. You have 3 monitors. One monitor needs to have DisplayPort. If your monitors don't have that then you need to take one monitor and change it for a monitor with DisplayPort and use DisplayPort on that monitor. That will solve your problem.