I currecntly game on Hd 5770 on my old TV at 1280 x 720. With no issues. I can run Crysis at FULL setting AA turned up all the way with lowest 29 FPS, to about 35. I play MW2, and MW3. But i want to switch to my three old 1024 x 768. Monitors. Is it possible. ? Ive gamed on two at omce before plaing mass effect 3, but can i use three?
However, as greghome said, you need three digital outputs such as DVI, HDMI and displayport. You will need to check the specs of your specific card to be sure that your card has (1) enough digital outputs and (2) actually supports Eyefinity (AKA multiple displays).
Your old displays likely use VGA connectors which are Analog. That means that you would need an active digital to analog convertor to drive one of your VGA displays (such as this http://www.newegg.com/Product/Product.aspx?Item=N82E168...). You may also need to use a DVI to VGA and/or a Displayport to VGA adapter as well for one display. In my mind that's just way to many adapters and way too much money to spend just to support a bunch of old monitors.