I recently got a 55" HDMI LED television and I discovered that I really like using it as a computer monitor. My current video card has three outputs but can only output to two monitors at a time. I'd really like to bring both of my 22" wide screen monitors back into play.
I currently have an ATI Radeon HD 4600 series double head card installed on an ASUS M478 PLUS motherboard. I would like to stay with the ATI Radeon series cards if possible. I'm trying to figure out what works and what doesn't. Some people are saying that they have to buy an adapter to do three monitors simultaneously.

Can someone give me some advice? All I need to know is what to order to get me where I want to be.
 

A second graphics card is all you need, assuming that you have a spare PCIe-x16 slot.
 

Kev999
A second graphics card is all you need, assuming that you have a spare PCIe-x16 slot.
 

That's another issue that I failed to mention.  I don't have any more PCIe slots.
 

Hi Dave,
 
Get an HD7750 (passive cooled, triple-head video card).
You can run three monitors off that unit.
If you need a format converter (depends on the inputs offered by your monitors), you'll need an "active" converter to make use of all three ports.

As usual, Jim comes to my rescue. Yours is a relationship that has reaped dividends for me for many years.
 
Have a prosperous New Year!
 

Jim Roseberry
Hi Dave,
 
Get an HD7750 (passive cooled, triple-head video card).
You can run three monitors off that unit.
If you need a format converter (depends on the inputs offered by your monitors), you'll need an "active" converter to make use of all three ports.

I agree... In my rebuild that is the card I decided on... fastest PASSIVE card... totally quiet, but you do need the active converter unless one of your monitors has display port...
 
Right now I'm using two monitors but also want to add a third.  Would love yours!!!

Just installed the HD7750 and man does this make my socks run up and down my legs.
 
Thanks for the help, Jim Roseberry.   Thanks for everyone's contributions.

Let me show off a little, if I may.

Nice Dave!  
Your setup has really taken a leap over the past few years.   

Jim Roseberry
Nice Dave!  
Your setup has really taken a leap over the past few years.   

Yeah, I stopped recording my stuff and started recording other people's stuff.  

WOW!  My tired ole eyes would love lookin' at those! Gorgeous!