Sorry, Turb. Without the serial number, all I can get is rather vagueinfo from a user's manual. No specs at all.
From Google I gathered that your mobo has 400FSB, so you would be really limited as far as CPU.
If your AGP port is 4X, don't sweat it. I have been told that 8X cards will work, but only at 4X speeds. Just don't blow a wad on something that can't perform better than an older, cheaper card.
Memory is definately the quickest and best upgrade for you (128 MB??? How do you run XP and any other program?). Buy what you can afford, and you won't be sorry.
My Rig: SABLE
Antec 300 Illusion / Antec EarthWatts EA650 650W / EVGA GTX 760 2GB
AMD FX 8320 x8 Black Edition / Gelid Tranquillo / MSI 970A-G43
Sandisk Ultra Plus 128GB / Samsung 840 120GB / WD Black 750GB / WD Green 1TB / WD Red 3TB
G.SKILL Ripjaws 2x2GB DDR3 1600 - Crucial Ballistix Tracer 2x2GB DDR3 1600
Win7 Ult 64-bit - Func MS3 Mouse - CM Storm QuickFire Rapid Mech Keyboard
R.I.P. Danny L. Trotter
... 14 Nov 1945 - 4 Sept 2009