I have a Gateway SX2802-07 desktop with Windows 7. It has only one HDMI port - for the monitor. I want to add another HDMI port to stream video to my HDTV. I see 'video card' and 'PCI card' a lot but am unsure which one I should use. Are they universal or is there one specific to my unit? Or should I be doing something else? Thank you.
We cannot help with shopping for specific hardware here on SuperUser, but this is what I can tell you.
Your system has "on board" graphics (built on the motherboard), but it also has a pci-e card slot where you could install a add in video card that has 2 hdmi out ports.
Below is the specs for your pci-e slot in your system, so look for a video card that will work in this slot and has 2 hdmi out ports. Low profile graphics cards are different than standard desktop cards, so be sure you buy one that can go into a low profile card slot.