Will this video card support three monitors one is a 29 inch acer one other is a 18 inch dell the third will be a 40inch toshiba.
ASUS ENGT440/DI/1GD5 GeForce GT 440 (Fermi) 1GB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready Video Card
Nvidia Surround supported cards
I use a triple monitor setup, and depending on your goals with that setup, you'll need ALOT of video processing horsepower.
A single GT440 card supports a maximum of 2 monitors.
I believe that is true of all single-GPU nVidia cards prior to the GTX680.
AMD's "eyefinity" supports as many as 6 monitors off of a single card. (At least 4 of the outputs must use Display Port, though.) That's not a big selling point for me, but it's there.
because 5760x1200 off one video card, with dp native monitors is beautiful
Buying native dp monitors isn't necessary at all. It can work with pretty much any configuration (I just happen to have dp monitors).
Maybe this will help you determine if it's attainable for you.
Eyefinity setup guide.
p.s. I'm not trying to start a fanboy thing at all here, instead just pointing out possibilities.
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