|Looks like TigerD sells those systems for $100:|
I don't blame you for wanting to get away from the onboard video but what is the purpose of this upgrade - gaming?
You didn't state what the wattage rating is but 11A on the +12v doesn't give you a heck of a lot of headroom to play with. My guess would be 200W?
"i think i see a HDD one. will a Cdrom work too?"
They're the same plug, so yes, it will work.
How much memory does the system have? I just checked Crucial & it should have 4 memory slots...probably only 2 are filled. From the TigerD link, they list 2 x 256MB of PC2700. Adding 2 x 512MB or even 2 x 1GB of PC2700 to what you alrady have would give the system quite a performance boost, but RAM is pretty pricey these days unless you can find some used stuff.