Macattack, you play EQ? I feel sorry for you already... very addictive, can ruin your life fast.
Anyways, you can find out what kind of VGA slot you have by using CPU-Z, it is in my signature below. There is a section called "AGP" under the "Mainboard" tab, it will either say "4x" or "8x".
[size=0.5]Full Aluminium ThermalTake Case
AMD Athlon XP 3200+ *400 FSB* Barton (2.2GHz)
ThermalTake Volcano 11+ Xaser Edition Air Cooling
1024MB Corsair TwinX XMS 3200 (Dual Channel 2x512) 2-3-2-6
256Mb XFX 7800 GS EXTREME
2x WD Raptors (10krpm 8MB Cache) 36.7GB using RAID -0
Video Logic SonicXplosion 5.1 Soundcard[/size]