Is there a site or way of matching cards to boards? I know the agp slot is universal, but from experience that's not always enough. NVidia's website for example has a performance indicator program, that'll tell you how much better a card would perform in your system, but doesn't state it'll actually work ok. Also, HP in my case, won't actually recommend anything for fear of being blamed if it's wrong. I want a card to match a PII Celeron 400MHz cpu and an Asus (and they can't help either), OEM board from HP, about 3 years old. Any thoughts?