How do I find out this shit?

[Biggo2]

How do I found out what graphics card I have and how much ram I have?

And what kind of graphics card and how much ram do I need to play HD games such as IV?

[Caltson]

Your amount of RAM can be found under Start -> Control Panel -> System.
A sceen will pop up with additional system information, inclusive 'Installed Memory' (RAM) with the installed amount behind it.
For your videocard, i'd suggest to surf to http://www.systemrequirementslab.com/cyri/ and see if your system is compatible to run GTA IV.

 :ps: Next time, post in Hardware/Software support. This is not in any way relevant to SA:MP.

[SG_Baker]

Systemrequirment is very inaccurate, use this... http://www.yougamers.com/