I have a external monitor I hooked up via HDMI, but I recently inherited another monitor of the same resolution, with HDMI capability as well. Is there a way I can have 3 extending monitors, or will it not work due to something with the video driver? I'm not too knowledgeable in this area, and I've exhausted a lot of time researching, so thanks a lot to anyone who can help shed any light on this subject :)
If the second external monitor was going to simply be a mirror of the first, then you could use an HDMI splitter.
But to extend your desktop, not just with another cable. You would need 2 HDMI ports on the laptop to support this. The OS needs to uniquely identify each extended display to function correctly. You could use a USB graphics adapter to extend with the extra monitor, though I hear performance of those can be hit and miss
The Matrox Multi Monitor adapter accepts DVI which is easily converted from HDMI. This will work:
Costs roughly $300, not exactly optimal, plus it just takes the full resolution and spreads it across your screens. Allows up to 3 external monitors.