Like what is the highest end VC with AGP 8x Interface?
The very best AGP gaming card is the Gaiward Bliss 7800GS+ SIlent 512MB. It's a full 24-pipe 7900GT under a 7800GS name. Gainward North America has closed shop, so this card has to be purchased from Europe or on Ebay. It costs big bucks to do that...not worth the price.
The plain 7800GS is a 16-pipe card and is basically the top reference AGP card. The X850XTpe from ATI can match it in performance, but features-wise the 7800GS is ahead. Again, these cards are expensive at $260+ and do not nearly offer the performance of a X1800XT or 7900GT PCI-e card priced the same or cheaper.
Next would be the X850XT, X800XTpe, and 6800U. For the most part all overpriced new, but would be a good used find for $150 or less.
The X800XT, 6800GT, X800XL, X850 pro would be next down the list. Currently ATI has the X850 pro for $139 shipped free....currently unbeatable in AGP for that money.
Next down would be the X800 pro, X800GTO, and 6800GS. The 6800GS new is up around $200 or higher and for that money it's a complete waste. A used 6800U would be far better. Don't get confused between AGP and PCI-e 6800GS's. The AGP ones are clocked lower and are slower than a 6800GT by quite a bit. They are basically a plain 12-pipe 6800 with faster memory clock speeds.
EDIT: Ugh! Reading above I see:
Also I am not a gamer or anything. I just want a nice display that will be able to run the future Vista eventually.
These cards are all overkill for a non gamer. I'd look no higher than a 6600 or 6600GT if you want to stay with NV.
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