I am going by the evo line I know, which were socket A machines.
If yours is like those, you have a crap power supply (200W at the most) and DDR RAM. DDR is dead and no modern motherboard can use it. Even a low-end graphics card will require more juice than what you have.
The setup I posted will use the onboard graphics and some of the system RAM, but the chip is a HD 3200 graphics chip. That's not shabby at all for onboard. Vern (one of the mods here) used it for quite a while and even gamed with it. the motherboard has built-in HDMI and so can hook up to your TV without anything additional.
A discreet graphics card would be better, but you would have to buy both it and the PSU to power it all. It won't fit into a $200 budget.
If you mean RAM to fit the Evo's board, that is doable.
Newegg.com - WINTEC 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Dual Channel Kit Desktop Memory - Desktop Memory
(If your system can handle 2GB of RAM... some can only handle 1GB or 512MB)
I cannot find an AGP card with HDMI.